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 0x90dcea94fc889d21c64cc71083f19365fa6d62ebe6b9df18d19fd2ff5060dc95. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efeff376-6612-49ac-a9dc-341c4e99dec0.json and https://artists.proofprofile.net/proofs/artist/efeff376-6612-49ac-a9dc-341c4e99dec0.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 0x984da4c2d37815de5a0d7173d02640871b37e3ede0109b9ae3700e51f19bbc4b. 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/INS172100819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30615803cd1315897059596c6c917e041efe13237e99eeef0842c2ab3ce0a44. 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/INS172100820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e81be89d3a8b1b0ace32bcc2f98a8f886edc7cff46e5d9481a1c975a4ea2ff0. 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/INS172100821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c3dd2bbcbb7ff0420526be2f8b0ee763605f444be3b112eff1695abc64a540. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:17Z), 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/INS172100822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf784afddea02e6febca60658c43a2dbe7ecaadea759487982cbac538f23ad470. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/INS172100823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd59c3ac04c66c4389a04c01d1ce96b2248e161949778542ffd067d347c798. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:33:22Z), 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/INS172100826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4435029119fb7cd41b0b5ab2737fc29461d4ebb084711c02663e25d1a7454a3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:11Z), 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/INS172100827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aa29a88f1003c42c27a64afad7d5511ac1727c98c291fef27218b5d786b754. 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/INS172100829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86059ae2476f3f5b3cb6a7eac0517e50b9fdd57b422dce7390dd4ed9039e2ba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/INS172100830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc423fa2a34681172a061bea377b95d77598390d96dada84d12de303f30689df1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:17:28Z), 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/INS172100832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5951fd7923f6aab60d31a1d65d19ce4fbc5347f4fb4b2a8be351aea8b39fa18b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:59:40Z), 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/INS172100834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e152769bdbab5f739ed9e667cd7356cb0784fd083c13689e6ab81e9a52d8271. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/INS172100835.