1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393218390a90eb54c8298c7a8f5c0a7932b0c150d65acf903e9f7f0422360c1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/552b229b-42e2-4258-9c55-ea6ae52248b3.json and https://artists.proofprofile.net/proofs/artist/552b229b-42e2-4258-9c55-ea6ae52248b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698b3ba30293d450332ba2656bad6ca5aad6e5b1d625b7d9d79ac842e82bbd0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731775334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f32d1429c61ce07cc5606ed1f81c25741016f9a0424110653f41ae9403420f5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732406601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628b7b752eb0472c1d781c7dfd41763df34ad96e5e9ed056f46474b0b8347aa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC992325491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b197bf4e23a56961a56a088165e01ddc8e94d18a47479124d40407e15dcff57. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC992325437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3cd6c386c8328d7065408b21097bc418ef24af37fc84a0847d807c30ddb390. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0H2325138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e9c8293b5c88b6b3d46ca5fc52c71f8687c96bd4526925ebb6e5cf7a9b825c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0H2373192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670b4f092a291747a12109e9e43ef5b6c3a4797de30eda0a94cf0f2e9402caa7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC992324920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0aa3f37841e1e0852960c67cb8fe32bea986e6578e0a26bb4dd1c2bd290302. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC992324490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b05f99a3297fc71fdee622655cde8e711323f00a0c21624b8d943aa3e8a7ed9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC992324042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d4b2ee5ac0a3fe8d01ef82a12d0f26a53db94c90b51ad41202d282ce7f045b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732313296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb008775e3e43225bcb63a9ad663821bcb7ae984ca09b193353de2e77f6034. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732305260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda45dfdaac3a3c5f1a080204a7fb19b5038965b4767c18f543732eb9eec9328e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732295020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ab167383d319d0b0f00f7ea312e9c885136c745518721f47630620f92a101. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732292189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc116d71833eeba2ab83e3e81679f24cd45e76013653df3518a332ff654fc86. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732292191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b451be1cb2e0a85950a7105f8fc823bf291fccba067d1020d104d80a81374b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732422264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87337c9cd69fd12781595a262017155828b6010fc8cc333ce9d2e0f97f76c68e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732254168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc175c9d627223203b791b2480d10385a6d6a2f27a1b39e6e964460ae2c9dd6d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732254166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab809a3f00237b8916c55431bb1f311502aa2ef749d2df4ee9673bbcd08d3545. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732229072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74d7aad2c6403442d411f1d5c3f16c29dbe876ff6783a6bda1bfa1c223b3e73. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732229073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b8898849c65f966d30b38307edc1a6e7009c3e8e5e11fc48b2cf3c507157f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732421340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdc93763a56ed06900d88f2980f082a82c5c338a2bba713eb9bf40e51c4ca31. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732421341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18dadd4ce5694f67b8ee2ca2f62cbb4b82ae4dec18feebfdfe818364cfb2711. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731761950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2f1082705f8536bdfd4c8dfdf95030eae5dfd44dcdf3cc82fb17e6b450a287. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731767283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdbf93951ed0aa2b42c98996136079a5e8402a966aa7bab2c80018a9f1c3cb5. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731736531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df584ccdfc14477906613470feb47c587a4cbf2b86fd8f500999682ddc5021a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731736546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca464588fb68d8bea13bc629b2f4692d60bb62cda14b632baad7bf6bb5021fd2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731736527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a0ead10fce979637eb8d340e54ec455b9c95e470e250bc1fc56ad7546b8a50. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732254316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3959c6667a177413c69bce263bcf04b48103142e11c97936ff81697114fd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732254326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae8d8a898e01a4a2fbd484d07c2bbbd66721e1e599ded8f7d363059c908e62. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732448144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982aa7515658eedee82a9035f65825c17b3a254bb5c6ceb5c4b035e1a48eda3f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732448145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca6b07b5fb28f449818cebe4b018833a6b4ee11acb428bc54caf0402f9cf64d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732226657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e367e66a9a77a36df35237cc563bbc14e711b1bdb63cdab82960a15ebd38330. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732226658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca03b1fed21f921a1fdb0e5b4fd97130d0d0e3a32da7667624e5ca8c1f22b091. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732106659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f9ce067e2654d5241ef9edb6048b4964c52a13ffde377553ec97ee61edafa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732104895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17faae40ce00b014ca28acf6f092f9f1e3ba5832294928b182724802f69bdc0f. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732104896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb3bc494fbb92188c027f9da798b69e4af797e88ed4401ed222f62c921b3f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc491c592b88f20fc7b47e00d8fd16611b0ce2229b49e74acef467a54794c242b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732130616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a026bd303767abc991d4a155abff1bff54645455e22a185c9859eff7e1ed43. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8db76285528d86a9375fc1206c021a3e7ef57eb81c4e277f577ef41a4469c22. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762078581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2734ec6bb203b51de92ac995429d5c988e726091aebb08d675ee381a64747f8c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72305034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc2ce47248ae2f4f53503e19e2e89e6907fd142940eba5ac15727fc4929616. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72301109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fe52d8678149232c80f9a525dc173eb272775ce750fb30970728d20f42ee93. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72202696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5efe9fc6e8e81a50aaf64fa9499e88334e43ccdb53f2ed6f3df63099835cb66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72200348.