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 0x745cfc187d033824a1966f4fb69bd39a128e92a20b0970479562e67a9d71870e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/437a25f7-3df2-4288-92bd-823e1bb6f201.json and https://artists.proofprofile.net/proofs/artist/437a25f7-3df2-4288-92bd-823e1bb6f201.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 0x5c12fe7ccf974fda7e7b89c71576eef926fbe0833dac473a739d805b3522f2a0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2P2006074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb91c36a99e575506af7e7e9902a277fe6c2f2ba0359ba26d2897649ed5fc96. 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/USA2P2006075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd84ab28eac08ff9d3455a16cf08d1a8ef2d1c34fe55fa39a94a216163b9854. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USA2P2006078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0569f8510f009ebddd6dcfbedd64de2ecabd4b3617ae379940e521426ec2de12. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:43Z), 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/USA2P2006079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8958c0379564c67e26c91aa8cc33af5b206f035300da34e7e13af18c1fbc48c1. 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/USA2P2006080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ab514853a9f57bc291dd37c70b536ad08861b0b078d7498e9e295c80ba5d66. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:56:02Z), 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/USA2P2006082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ca66055705a225b24de076a7507e24e3872ffd49b98be84acf0143891ec6a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZQMB2104917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c55f545b826e3d57d8be25a93362bd13ddabce3815e2ebc4fc23887077d8d5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT2HF2400667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72866451d8ee3f9c6fb2844ffba80f3026c1e835c5ed77753c17525aa6313193. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT2HF2400806.