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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd8cc8c22190fdcebc3cb5a4c02fc5fd028645e5a994a4f5f40d3464c26bc98. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a46360f4-0582-40d0-aa50-ee87efd1c916.json and https://artists.proofprofile.net/proofs/artist/a46360f4-0582-40d0-aa50-ee87efd1c916.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faa0de0b738f991dbc7e3075dda927bbe653e02e09629f56b6585d3b81f72e9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNW72412617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85846ce88cbddfada8528afa1f9c7ad5b348cc61bc37d75136fa1887c4456dd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:48Z), 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/QZNW72412619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcebe163aca8bf98dddab0c130dbdeebb337210f40ace9bf71af0807a991500d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZS7J2448724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd7dea2636e3ca96fd2c8d2cd9d7ee7b28df410093477d8d7d994765c6f305a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNW72411750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b253c6490dc6b67f92f8e6f0daf655e1b5673ab45bda42d1d80495ab086ca20. 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/QZNW72412661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab2c7dba02d2a8ddcd9a102186bb9b4e3b58e65258dc8ae15ec4764da0896e6. 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/QZNW72412662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad0fa8a9f50e64fe6e5d28041e10a6ab00cf641713b6a060cfc3a76fd0b8b78. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNW72412663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc68c4da3fccd3f1e60241e4fa352234795f81736f0ca5881cee1da00bb4ba4c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNW72412664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638804be0e89ef9ed048d093dbbd575e6ff07da30577ce9d64b77f5a51d53d04. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNW72412665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce709ccbd52bef755c0039210b0fff9fc4a28074bff00c34549c30b7235ee66. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNW72412666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c9fdd86a0d1d2abd7b993564d802d6fe23b250f5bb53fac07d08d4d3932c7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNW72412667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9135b4c6595bb3e09ffaa4aa64ed5c2cc9e345fdcf93dfff91719ca51c9c6f31. 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/QZNW72412669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa4678b2b6d0a084debb9873380b4a07d60bb5dfb281094a091f1f2d6b4ba5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:03Z), 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/QZNW72412670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115e1d34affd588a299b93e93df6665a3f85e3f3c6f7f4ad79c80e38dfa87a7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNW72412671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c586f8a2febb5e4ab55454d023586922dd2ce14a209299d69164fcec26651e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNW72411748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a346dde9a76c092dda6fcfe55e4b089342607ec0289c2d2c271f59eb925b2e. 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/USHM22576951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cb49fbd3c75340afdf651c06b964dbd99153a406649cb1a4c297d3c12ee41a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWDW2567098.