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 0x9289797344d20bff6a11ae504fd3a089aab988bbe479e9d8aacce8d00328285e. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e6b3468-b337-437f-8434-2aefa2e4a69c.json and https://artists.proofprofile.net/proofs/artist/0e6b3468-b337-437f-8434-2aefa2e4a69c.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 0x1055cb04dbe05f84a9a96dd10cee2c9ed17e998e51f2368d8d48e89d673b70b7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:22Z), 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/QZK6M2026013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25890811a3c41317a3a4119e9ccaa5db281541e958c3f3ae6e2ba18b4d83e933. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6M2082409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbecbff49ac9a822a2ef9689989c6326e12fe0e4e4f33442fa71d310acdce4f6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72112029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbefd30816aea4e9239eafa5ccee178d261668a7ca1a15127326a36425d872ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWY2108419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb873b49730cb6a36ed6e1bdf51c56b83b5f390f5772acd4e3b5dc1b3981053. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNWZ2106721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8575c91865ecc66eaa97ba6a92219e5a0fba04b6d5c98418e227197ccd73d7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:46Z), 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/QZES92225214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b43df02e370475dc1197157f3c55b183ea5445a8dc4c022dc0399a402bc8c9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:32Z), 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/QZWFG2334791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40efec8e2d8125ef9a2ac04f796136cbb06fb5f90d50bf6200f0b2287bbab14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ772496708.