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 0xf980082cd27a549846b5ab814c2c84e8f9b1ad28548964141ec4b01175ece066. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf915bf5-40d9-4ec4-a5f4-d87ff0821efb.json and https://artists.proofprofile.net/proofs/artist/cf915bf5-40d9-4ec4-a5f4-d87ff0821efb.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 0x917a11c9f44fda54170f5e53bacd73869f4200ae22aead8be4089d6ccb8cc4c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFN2337558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5af38dbf2a9d5016e6ac8041404638bbc024f72e2e06f2d3c4990bd6a53687. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMEM2456315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259250510171a7e5168b93d28fe466d363d19cffa789b41effa8b7acc7011b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEM2456318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1fd7e39e0174f5d391620d3d49b54583c30bb544c9fa44911871d0dd00b5ed. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:59Z), 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/QZMEM2456321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307bc6c812228e8a6e34e2f1c6b851f7bba07ac42c772313dabbe6597a59b89. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:28Z), 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/QZNWZ2403080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8eb9565f85bcc1c842dbd3243c76045f593d10556f10292b391f39c0e9d5d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAZ2447332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966e29b854e661092745b30e0000415cfe2ede7206648aab4a114d1b5f41172. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEM2509452.