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 0xd77575ef2cd09fdc37c0b126dbdabefe1a94366d9a0154b3ba15bb8f29ffbb88. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77448c5b-6e39-4c9e-b26c-582dc921cbf0.json and https://artists.proofprofile.net/proofs/artist/77448c5b-6e39-4c9e-b26c-582dc921cbf0.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 0x30c739c0a3831f9c3d9036c1ee9d829977c8af28ed9edcc59f5c2e026b4aa938. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7L2402191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bed561e18bfe22ce6abf8359aaaa931e70125bcea3dc5db702520fa4fd241ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7L2402192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a18ab4980fc35b868bb1edc68793aa7ae973ac272a90f1733e1896ccc371deb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7L2402193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3702a332726bc9ea1665f72c423971f01bf27c8a07a567d174f3e57d6b98f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:32:04Z), 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/QZZ7L2402195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa614ace4b959ae03f58a8c5a0088aca23ffe0826a7a76271f6bd1e4ac34cef0f. 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/QZZ7L2402197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cc0e4f1c3476bc2c709c9bf512d7f8459ae8378e30418fca6d6c7a17690f63. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CA5KR2531331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3588d36e25fab72d1c9d0444a84ebd370c41fc87188e93d625e41cd1d1edecf. 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/QZTBD2525824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265ef9b12cf5e4f5708f1e25a9c085439003fe1bd4a01747d143979b7ebb90c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBD2525825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b239bbf6e53b7ce39a3f868921bfbe5cb5c8e0aea8b1445a7e13c646fa215. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLF712401464.