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 0xd9877ae33dfdc00bed1a78d5f15e02bde09ee24436ad44adbd98e237dfa51f89. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc77c372-451c-428c-93b9-ff8bed504f70.json and https://artists.proofprofile.net/proofs/artist/bc77c372-451c-428c-93b9-ff8bed504f70.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 0xac2bda0a80333f8b1ad710a84e66ae2f6dac3fa03c517671023afa9722d62411. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:43Z), 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/QZHN92371352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac88747f805c3781d192e54db146738af96d693355a6601465f8a41510bbe1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:02:13Z), 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/QZHN92371353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815291251a24f1218a0c01fb24d134a6bc46a0c7692ee7fac9da5d77e02ae24b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:13Z), 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/QZHN92371359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc66ced586a487d5161301bae3784a0e8ab8373ff9e34db83f6aa43b188a92f9. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTB32462174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980af27843145e406051992bcf7ed285056691d7e2c782fcca96eee690ca861. 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/QZTB32462181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc769988e3078052dbc1207e89e64d7fd92e4fd7985d33ca6e7c6e513022e27a1. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZTBF2441740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76d2811a0f96836ee06e865c1119d5bf427aedcb637a30c012f9e99dfa3507. 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/QZWFV2414698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100bf0cfa43abb415cb87359d4412286e43e5f5e7ed111fd9c11c6865f3609c4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T03:00:50Z), 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/QZZ7R2479802.