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 0x0dce5161913d214655085bba621fa163cb8e9780f17531a569ed98ad44de3783. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38001d22-5f72-47f2-92de-7746c8beda1c.json and https://artists.proofprofile.net/proofs/artist/38001d22-5f72-47f2-92de-7746c8beda1c.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 0xe18ce8e31e8703d34bf142b2bbff15ca86f8f022d65f97f9b84ce3d459ef9c14. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ITFGO2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6a888beba404f0e3a8347751c2573622aa267f27ef02eb32769b14f31f6bc9. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QM4TW2417530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79852cc4c91ba0133547bd191aea90b24cc92fa57b45f017fac6cc2c6fa21ba. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:42Z), 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/ITFGO2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c08d70521c7828ec0b84188a47b7b729e796cde6737bcc5abf1cdfa0062e3b. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ITFGO2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cea5ee3fe2e9751f8d728f5d88055d1dad590e8d0b30e11fbed61648ce3f8b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:01Z), 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/QM4TW2525517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed22c66469cc953369f0e03dcbc654a7b9ca19ce26aaf8aeea670ade065fceb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7532200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb896a98f67cb0c1e326cc77eb2497c22aa62ef1507df1fb2bd1e245259b61c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7532200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d589e9f833ff6a030ad8e9e63184a82f3164cce4e97dd2a642916bf798aff0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7532200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6a9a40a4a7e058ecde281f9675d4538571f719fa1595f4588906079839479. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7532200010.