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 0xe6d136f265d5069378679e02cc95bdc86a57b31374173bc1a52d6de9567b2574. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e723150-118d-420e-8cd3-2256f86213b9.json and https://artists.proofprofile.net/proofs/artist/4e723150-118d-420e-8cd3-2256f86213b9.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 0xbff3f67e399aa0f7cad06457fc1188998e28e2a9427cbb38272c5b68f7980465. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:37Z), 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/QZDA72327788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16850f0a66563a8a460887fc18a9d72feea2b961c28a832e9ae534ace111bcf. 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/QZDA72327789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7ee911206dd106ada1de36d1aa7423a10a12f6ffa3fac914e778533aaf6332. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72327790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab4b4666e076bde6d34aa1451d8cadbd980fe8be373cb897ef897552f6a033. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:42Z), 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/QZDA72327792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff90541e45e1a3d49a7847b02f744208f582068e291786065bc4c82c879268e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA72327793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589288ab458efc5c0581895135614bc4dbc27c9331002f965b8425731cdc638. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZDA72327795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e3fae7368dcdbeb7b8d97c9fd1bac6e27ce2fccd4236ba5e2e2ec6286e21c2. 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/QZDA72327796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b8d0bf9ea62b7409df30418fbf96b67b66a4f3c5fa0082de9217ba99e5ae6c. 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/QZDA72327797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa650d47cbc742b41667ad8c414ba363e824417041f01cbbe6d9512067cea769. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBD2334359.