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 0x3318973e901d0868f63e2b059fc489992058518426e279e7cab62daedfef3ea9. 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/bc03e808-4442-4e9e-823d-8a59ecd56bc4.json and https://artists.proofprofile.net/proofs/artist/bc03e808-4442-4e9e-823d-8a59ecd56bc4.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 0xe54b7d75c104d014de4b2af4488c4abd948eedbaa979d40e55946ce0f6e93657. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLL6R1700837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9ea1325802ac3806659c38e6a89a80414977b50a2423008a42b70ea30593f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLL6R1700838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2003d0784d39b5f2543c0f814fd9258c76a032691482bc78a2900fbe479280a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLL6R1700839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432c2ad5f34c5e166a5460300753a24ab1cae210a44a32bfb2b1cb2bb9a92a4a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLL6R1700840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20de1f3e45b29bcf7344809a04ef46942c718bde67ae86e769d4942618b1ef2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLL6R1700844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72551ccaa8b8608dbf35f84da6a049def489aa40b557066b222a2e99a3c3a0ac. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLL6R1700846.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6800ab157f83082f15bea97b0b19215a45fc5055ff2dd8a3ceb895341c78655a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLL6R1700848.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a686736ac3d8797cdcecf0f803e788e66f6c5b663d49da5992f39999d6d3fc8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLL6R1700851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7996d7793076913a7cc4a9d4618ffbbe74641e9653160a7d0d66ce19f26ed25. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLL6R1700899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb98d6415e42448cb14b272181a3e418287b3696fe1489165e53d7a96d353e3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/NLL6R1700901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cb07378f37854a90083cfea098a1a80c132b21ea60829ecf94d4c2111c13c9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/NLL6R1700911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d328fc4512ef378c2ab10e5559b232be540e737cb5184f2c9c6932326b4958e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLL6R1700913.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ed9772d01c09c38aa9e8102cd1d950ebecd0cdc837c20a8c5a8b7916169cdf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLL6R1800628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e60e448aceb4e05ea707c9fbb0dd7c3b2af654172bab2f9384b372713c84499. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLL6R1800629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5837c5801ea14069ed5a4de1f1169dc1b632780a7bb21861c834353538664deb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLL6R1800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b23abbc47ca465c7b5f4f2eac7aecdd8c960adb269674c7c77f6f4d5256c381. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/NLL6R1800631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c1ddf5cf4250c4ddd7a34acd6faeb8e7e99e7d174a6cd64217f5fbcfb27ab. 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/NLL6R1800632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd0a82b6424e588e9282bb21d5cbf26880e542c9576a9381f9b31d60f41df9. 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/NLL6R1800633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b65af3e880d1d0f014a9992f27806521796c04044b2ba99411e9797bd2b2e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLL6R1800634.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51359c974c60718c3314020da2025ebbe17a58600229f76483189955cf5d0737. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLL6R1800635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc132a4fda9177b1f3a68f7b46b288d6413eb7f6c53687b8e187ca2aa8f478f56. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLL6R1800636.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cb8fab180a14f23158c587d53db06e666a7280023acfeee9499903c53e1f5d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLL6R1800637.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8902306e5efa4bf007b7e70414d9f6089220530c2c82acfc1aa508b0356aad6. 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/NLL6R1800638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4e061b78465c29623c8b7b9f74317bfbe8093a9d9d0a6e89262ef61d8219cb. 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/NLL6R1800639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fde0ee65ed9da422a8eaccf65c722f7b0ced68a427aa27cac249d52780c12e9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLL6R1800640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e77555ba951c40adeff62fdb56f23f52bd8964307c7e8c6c570b9a11f3462bc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLL6R1800641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bc776230b7c158bb14244295113a66486a2606c32f4b33ee84d5b55da5146. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NLL6R1800642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3497059e7df9a03609c7245d37d6fe548d8d216423918f32d43acf94cda402fd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NLL6R1800613.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3ed5c439c3f07fbddbc7dc7e7e4f3eb03eb99eb9d2fa4103ce55f11ac44385. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLL6R1800679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d40876babb97c918742d951a482f7a64ebbc9749998581ea72682f5c283f1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLL6R1800680.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bf69282ba6c87d816aa2fb2b682656e9645bffa53b3d065093b02aed2dcd85. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLL6R1800681.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920380a56df7a90888be9857072dceed552b681644ec046f3e09b7f33dad2b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLL6R1800689.