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 0x17897d126316611dae44d88265c0e9b57380292db33cbf15e3cfc277b2ecac32. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ae07e99-ad89-4813-bcda-ae207d559c61.json and https://artists.proofprofile.net/proofs/artist/2ae07e99-ad89-4813-bcda-ae207d559c61.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 0x0d71269dea2bbe6bb107f7a444478d52b30e7f96f83d5a3197426bd40fad1abb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ2566340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4b6d16d399776b7cdef3036c16418a67c16dbfddd8cff2cdae26d38c07219. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2566341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b486a87644e90a68439f19011143b204b45def30edfe705b783ce435cb6ac07. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USCGJ2566342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894cba11896eb0a87e76d0df4ba544292c133b62e5aac1a10f62396a2255682. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ2566343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b62e12940642c709fa12905f46ddf49259841a72ac21d646f8f0d2a5b2b1db. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:37:53Z), 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/USCGJ2566344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a494246ee7c9c029df518ba0b582aa6b63bfceb19b6a17e0003b44cd3d9d0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:18Z), 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/USCGJ2566345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f38ac0e03f8ecb83fe50d5f156ba245f63789e8f16dee206757d5fd27825a6a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ2566346.