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 0x911322f65411435e3bdc0a7cb882f4ca7206a6e677ff8828be62337187932b57. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/431f941e-f0f8-4a6b-b3ab-9579f436e965.json and https://artists.proofprofile.net/proofs/artist/431f941e-f0f8-4a6b-b3ab-9579f436e965.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x5fdf5e0544308a32b1110509198da62582a94cba7e291d781ec8f8fc772ac0ad. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/UKKVK1801342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ddc293fe043573321a93aa6dca3ef07aff1fd58b555cbc5fb906bb2540a793. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:21Z), 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/UKKVK1801341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf956def84354ea7625a250d198f68a3537958fadaeafd59529913524a530de80. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:04Z), 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/UKKVK1801338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe889109844a8a13ecfa66027713832079a69f1a2c41b789bc42dc693d073aa1c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/UKKVK1801336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8d300e96b63477dac53111ec7f510cf3d385e08fe99eb61d4af5709f3ea57. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:33Z), 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/UKKVK1801327.
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