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 0x4f7a13a9c72096ba5531249d2bc191266faa3352c7168f894e95bfa7414a62cd. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f618133b-fe09-4706-a20c-763d40a8b1e6.json and https://artists.proofprofile.net/proofs/artist/f618133b-fe09-4706-a20c-763d40a8b1e6.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 0x339c6223c50955dece43a8ec839ebb04ce52ec21b22acfe7bc671fb4cc8f3718. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:34Z), 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/CH6542292019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf506bd17741df708a3edc66e2d794e61e7b2473ec94135f189f01d47434d501. 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/CH6542298746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ae97754bb309e65a2f5daccba8c578fd62d71fb80812029012ad6151e3963. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:49:26Z), 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/CH6542329621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7dd9c94506eec4ce68da0962012719490196c01e8983eed02852bbe8d0d1f. 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/MGA0M2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4c888b6bcccbe02e2cceebbeca469efb37e1a6977e71475522c19b19acd3fb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:56:43Z), 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/MGA0M2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec74a6d3221f6fe76fb0c473ff0b7e31f1e8978417dd0367e1e629dcd28401d1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MGA0M2500012.