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 0x62637ccc4bf1c7ea327d4deb8dcf2fc4804fd8a628e3bd138166d58cafd8986a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f62705b-0e74-478f-a5c1-d4c2a5f06ca5.json and https://artists.proofprofile.net/proofs/artist/1f62705b-0e74-478f-a5c1-d4c2a5f06ca5.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 0x7888a04b583277c1e3b66b5376d4b065569e41f2f92342b312707d3a7c2ca467. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:51Z), 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/QZ5AB2010727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f696c9aa83707a65041974563c1558fdba476d9f3548cbc59938e8f0ed805c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZ5AB2010728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64b029d770f75d04391ffba567ef929c59b4a9833ca43a37c08fd23c4cc3f0f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5AB2010729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a5c3dd135ae0968c270a2c1855804ea3d19deaa7341f8f7ab8389f47d7754. 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/QZ5AB2010733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f09464c2212b67616cc61c4eb04bdafc3aa088e2017cf54241e82f45291e120. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:57:55Z), 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/QZ5AB2010736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d238be9e63e0b631def468b5cf11a849e97d587a29639643552d31f4cb7098. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ5AB2044529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b3e69fb1690e4f4bdb319d509685b9ba2594e0d6c23b5d471e2d02db59d97. 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/QZGLM1907827.