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 0xe1dbf4b18c8308d6cdb7b4a8b6294c5b0086505bc494d623fadb0fb6f7a622cc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b082d7bd-b565-42e7-a027-6b8f802f74bf.json and https://artists.proofprofile.net/proofs/artist/b082d7bd-b565-42e7-a027-6b8f802f74bf.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 0xf7f0eaec151161dd85434ca070e486e1d629f7eebb7ba0e3cd0a2d36b4fdfc98. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL4NL2167695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4594db866b27e4512afc71e389686f062c328510b307b21de0340140f3160e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:09Z), 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/DECE72200884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ecaef47065c804d37cc8411ce2d9c945015fc5988b151f1fcb3228e5c15df9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:56Z), 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/TCAGL2232718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207deda08df19136e0dab2ba43afce6dcef64958db21cf0443b20b338d1e9050. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:53:49Z), 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/TCAGN2274379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf980de6c5e3bf5837225aac18f06ccf9b087393408762c2f506fddc8b031e6b2. 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/DEQ022391370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb53e5c7875856eeb32e166ecd7070ec758f26063d31644c288b786fea11b86c. 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/DGA0H2336797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e86e58c483f776c399f8205d7fa235f2b815d784170ad9259ca9ea672ae988. 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/DGA0P2375039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdde9bd78e02e74a23615b8938287f3e19b173abf7da956ac339ea5065ad9412. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X42422792.