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 0x2a701f2e4e1546df7c7c04c0ca223d733abe91f2b427d9ed73d5ab902fb7458a. 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/bc18c894-c696-4e94-ae32-7aa319ae0a40.json and https://artists.proofprofile.net/proofs/artist/bc18c894-c696-4e94-ae32-7aa319ae0a40.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 0x5546e0882ab621597e06d0fa989d7aa85b84c60020c9050c6f1a87dcfa8925c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0H2353132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf46b0507271a3d24d5227321beb62054b2b6aa2c63b17154ec41782207d4b26. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DGA0P2353038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a51b39f8e3e41a41adab03657dc4d5ee452e72677b70075e93f0e6b71590226. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHT2465676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1662d4cebe38cd41af0c3da7b959689fe7d84cbbfe711bc374c54ee238c6b1a7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FR2X42435292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539277b681248b88cfbb5114064026a5413eb85f5627a8568c1705bb9b64af84. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DGA062405116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a588d1334fb8cb389c016ee0e6023ef4a4ac17882298666f325ca7b6134c85. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DGA062405117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c0ffa85069a1b234c8a4fb1f619fb3c843751eadbce55c91b8115e29db44d. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DGA062492195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e7ab8f030b908fc0013e912c7438935b9cf468dda4d25cd72f2e6dd8738d1. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCAIO2474675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e7ab8f030b908fc0013e912c7438935b9cf468dda4d25cd72f2e6dd8738d1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIO2474675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e6c47a0ebddae2d9c2eea99ee71357478a0102596f2c504a781aa630969c88. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIP2456207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c3473cc1ea8cfbbabb990fd214dfe5e9ddd52304caab60a28617e94fc6d12. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIP2456209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e348813f8839cf6683ed17ae8da7469997974f169432dc33129fde778e4eef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0Q2425878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc48e10b2727dbbc0e88644898f26a945c8ee3837723e4275ae29ac76f446897. 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/DGA0Q2416972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc54d1290dd03447c9f42923f843dc05614baae068715402e37617894bd9276. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0R2490239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7202d084fb623ef92343ee0a8bbca696e9ec4981214f606a2da2de161b4ab9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA0R2490240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d603706670f6dba2d15b3c644c96e387f38f1965b2447549655facae131e4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DGA0R2490242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74f647b1e322a69cb4774c9bbc22c1c12261934b9b2fad8b0676c1b4e7d738b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S2518928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3b03a172d80bc6b2e304fc3e3ebd616fc8a75097075b10bee9d49ac1a652a5. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR10S2518929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e01fcb90fbdbe77d65204775c13e94b560088d0e37416f785b81a0173bef3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2518930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae4a8e2ac6457a8278b09086bef12d94a37950f02607651e02a17c68e21ed14. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S2518931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d0359ee5d5868e778ff9e9732b373cb39ae6926a0ab4a9db2a955aa7f1729d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR10S2518933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a83764b4295f56082bf2dfa83dd1afed02be36b3af14f2f6d7020e10ec21223. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR10S2518934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db689e27776745a774f59fb98da8dace84822b4de749d3a88c722c826a7d659. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2518935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c82e4e17eb6b79fb892f0ddaa5a7350e3da0a40bc8bebbbf3137ebfc4575438. 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/FR10S2518936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8fd4d1bebc73388c939fba259d84df2e1d19b92e1d9d7f547b275f9470ff93. 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/FR10S2598984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d81c8531a6911efb976387664b6e42702481fc110476bfae9520c673d9e1234. 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/FR10S2599000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5d3a3a98dc1aafd33d8fabbed0c109af8b6dadbbac4e7fb2f65fb65ad44c3. 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/DGA082202335.