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 0xdf2e913cc81cc660ecc98fd0d285eaf62f4812f2fafce3290b4639d053ca16ad. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cc01483-fe7f-465f-b506-4f59112dbea1.json and https://artists.proofprofile.net/proofs/artist/9cc01483-fe7f-465f-b506-4f59112dbea1.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 0x769d2e826d23f63ae334b7eb0e4d83e3911884dceb309652830afb05a35e8cf3. 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/QZWFF2365816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccea3a786ff948ef81ddf8c3be6ce16784533ce14f183fef2d15af632d41476. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:08:52Z), 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/QZHN52429904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73701c87e9498645ba54db3e5c2d80afa914ed866d183f77555d164b10d6d6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB22433208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101c1dbdedb06ee9aff153b30820325513c9706e9cbb7c9a83e1e9c353c97cec. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22433209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b333d4b45bfbecb578a185a275812c1647aca407e8e15ee3e81d7c94183e73b. 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/QZTB22433211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9180c371ccb2d2b77f31cfb03e71992a79df72bda9185903d900190203f7d8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:01Z), 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/QZK6J2403978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b48edd13f32d43d4b15f3170dea0009c030f89d0f0a63cbdd1d79cdbc9de03f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB22433215.