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 0x0751b22e56977fc0426c6de4c3085b77de22d151f09e43c960f4fa92ff6dacd2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be17363a-e270-476d-9380-2cb987fbea3f.json and https://artists.proofprofile.net/proofs/artist/be17363a-e270-476d-9380-2cb987fbea3f.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 0x355dece62f67b8f05b836cfaf90f6106a3080248306daf28117e053bb76f7520. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:26:11Z), 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/DEQ322200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff8a536afe024fcbbb87ebfee40f2364ca1c7867c02b183fcbde1949038c94. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEQ322200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb65e7a83e509cece6d25c4c1856930a8c3eed3bcdab697d46266dbe5f7bb9. 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/DEQ322300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa718bf6bbd555c11749db0e6fac2d8da0e4ccfb7560a124676c9fb06d30655d3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEQ322300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c57ab24bee1b29c69b0ad1fe24b42393733709dcb47f2ef0d593f96a5b97d09. 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/DEQ322300436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d685727463a4249727bf3a46b1f24cbe9aef9c1fddb5ae98c7fa9e6257bd94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ322300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb65e7a83e509cece6d25c4c1856930a8c3eed3bcdab697d46266dbe5f7bb9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ322300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb28bbbf1de5bff9584784e7ec52a3fc3a224f0d473469c95b85418aeb4f4a76. 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/DEQ322400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f865418d47905782902a90915af7296f20cbe5d5ac9fc5cf1211a979425c414. 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/DEE862301312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0526512563b61ce0a73a7777aab2b10b32d8cb317ab2a925e9b2b937b82d6f7a. 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/DECE72202214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0526512563b61ce0a73a7777aab2b10b32d8cb317ab2a925e9b2b937b82d6f7a. 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/DECE72202214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0be301d2f40861a5ba245d0728b16bb6b8296676600132b9144672a913dad3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEKF22400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0be301d2f40861a5ba245d0728b16bb6b8296676600132b9144672a913dad3. 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/DEKF22400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0526512563b61ce0a73a7777aab2b10b32d8cb317ab2a925e9b2b937b82d6f7a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DECE72202214.