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 0x6cd7fb060e2e8826b46fdf297c5a18c68bbb9188e12d4ebc83f8fe57c6945255. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81998073-0faa-4fea-8e36-db75d50b9e97.json and https://artists.proofprofile.net/proofs/artist/81998073-0faa-4fea-8e36-db75d50b9e97.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 0x28917f9e652507ba28be7ff136070e1b8d5901e7e3f763d4100a1d766773c2a6. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/SEYOK1629811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8c1a18f85c6ac9c76b9a8b080bb0d99c615ac20786e115cdb1d00fdda8a77f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/SEYOK1629812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce6ae6e996e6ff69c3bf2d2b9dcb3b620c94dbcb1c25b7f140e4c7a85e9eb79. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:47:45Z), 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/SEYOK1629813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23dda4c9e46f0bdc17d654ed7b6dd9318b3f867ca34a89df00e1681b2d1ec61. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK1629815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bf988175cc386d52e230f5b9ac08828e4340b8a841f7ae9f13d3f02b85c840. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SEYOK1629817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38fb309d9a61752084306d9534e73465bba4381bac931c5dee217b7a63b1f16. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEYOK1629825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c15fb417d5bc292243e53ce12c38bf6a2bba54ea5009e1a2b6c72a36a3469. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SEYOK1629826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2fb5f602f374ea8cd1b127c2ea85b48d88e11c7a51764bcc570ccbf0785520. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SEYOK1629830.
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