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 0xfbe1558b71984e0ee6689933dcb78c8a2a41504ed7fcf699565e43b6cbde1e4c. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b264f60c-80b8-4989-bb61-3b9de145e9dd.json and https://artists.proofprofile.net/proofs/artist/b264f60c-80b8-4989-bb61-3b9de145e9dd.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 0x567469afa601d70a1d9e3f6d1750bcae50beaf5596a3ad0d08d9dbacd14fb3c5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPS801834231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb8d0642223d0d20351e15d453f352c7d2554ed3d37751987e157df3cb93dd0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:36Z), 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/JPS801834232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cb2ac84fb1a4a3dfca9cef6434cb7e0bc6ecc55ecfa56e9d0f06035430b950. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:38Z), 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/JPS801834234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce295b8ab9889a0d60dbb82968003ed474715b721dcead177625aaff78fe26d4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPS801834238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cc06c02ad0b5ca4b2219ed64ce89fe7f53f0fd513c88dbbf26579a93c02fad. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPS801834240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca23c3c57cccb6630e20d4618074aba8016d4dadc8313e9dca2a6d134fa5c40. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPS801834261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d22daf3931762c77fb6408306907b1d5c7334ca0763a8f004c0a96becda559. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/JPS801834246.