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 0xe11f63bcf4f3b70375fb2a72d45ce0aa7a86ac89ff969f3b58a0f37be9061ccb. 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/cee20e35-10b4-4202-94f7-1515c56f27f5.json and https://artists.proofprofile.net/proofs/artist/cee20e35-10b4-4202-94f7-1515c56f27f5.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 0x410eee56853a849dddd02689978dd2300c5754a811363001e5115b961fcb0f6a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA52140724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf093e50dec8e3deaa587c109794564b0781372adc4798e7ec6a212aa74a3f0a2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6L2135491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4465a183d0585709ca5daeaccf391b42382d7b4ae60ca227b0ced2f17673f3bb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6L2135492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe122b545688a8388ae8140d76b9ba38b5a595feca1e9eaf0db45cea57b02d6b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWX2159718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285c9af4661fef2b9dc8ad85e717223f75d0648ae09ef3c4f85263a60fa8f5d8. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZFYY2251528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef9fe4c36f3d8f6095b7da10e84624649b1b9907fe3027287b2291bae8a1a4. 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/QZDA62272797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1388d7be44ac6575c09c295f71fc09f97b491edcb58cc2f4a3b4fe8a233d853b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:20Z), 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/QZES62262983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c90de93e9337d2568a01578ce585fbbcd80adf81179126b2aa5b653e74be326. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:20:53Z), 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/QZES62262985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eb221d08171bfd5e86d6cf8d52d1ac7934254cd4c1f7e95002baa2ffbbee1b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES62262989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8523c8dd8d44d299d6e081a06ff4f1ace30b2113750597c81e8492ee548d894f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZES62262993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1171101671a9342b4487ba6bbd85b7e1c2584bda1d3911aec9fa1c80555ffa5f. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/QZTB92275837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59508160cb3c74b530b898fe1e7b62a76428099a68f71bcad0dee40e6196ec54. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:54Z), 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/QZNWT2329720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e942ea8117102be783d80249042225711cb9e7642bbb1ed48ec17d7d8e1eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72329592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1527d833be2d21bc8956543439df40ca0ed89eb2c90b96fe8602ff8c30577d5c. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZWFE2361290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa1b80c94259e6920174d6646336c0ee576ec78e42bc526ad23a31515ae4d9. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZWFL2386163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db3d78e21d0cc5fa00d3931ed0d78308cbaf2c49d9b14d87c090d2c0e4e2fe. 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/QZHN52421469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa85b632c504f1c829534cde99eef3c5a08cf9d768503534d264d4905b38c196. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZHN52421471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5bc5526e884af1ec0f3249e0ae3a3297b054d94f77746dd1e9f444caea766d. 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/QZNWX2421479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7c7bcebdf275221f0dfa3a9036b2e94f4b8b42cea905bb4e0ab7990c910edd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CALVP2592972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f86dd375c94363c90cfb2da693a508e8fb9ed1947b143a6fef7d64233a78a9. 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/CBEYJ2456065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d2b98ab33720bfc3a781487506416af252b1468afe34fcd3dfdb0ac3844f01. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CAGOO2451470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eed4574f105057335cc6959e55e1f84519cd856f44b93c843b3c95d8c7fef0. 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/CAGOO2543153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99d36b2c6ef789265e01ca3147273039a524d6df108b2083f4b8b245a7f06a5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CALVP2592973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27e3d19dc1677c973418bda82f522b5191f84d32f2bd74771c42253d2edad2. 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/CALVP2592974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d03afc4232732c44b88e2854881c297c51a448e7b71647c6cefd9fc8386879. 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/QZTAY2598878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c49728b06e3038de76db3dc87bbb387624d11b68646327379db8cfb05c8252. 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/CALVP2592975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ce2e35f8f98e229446b91a969ac8f583906932b7fb18444e99ad5a89d2ed06. 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/CALVP2592976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6eae8c373ba5768ced97a9fd61492b52fe226156429f98a438d638a0c9015. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:57Z), 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/CALVP2592977.