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 0xbc5798adcb158fb1213f107022aa9ab2f341a6eed0759b68e648660feb0df554. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad824ceb-59c8-4768-975d-a5119e457aa7.json and https://artists.proofprofile.net/proofs/artist/ad824ceb-59c8-4768-975d-a5119e457aa7.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 0x449eeb2649844a1115bc786834c6102ed029f5a4e3c1c4cf40aecfc7ee6c91cd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:39Z), 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/QZK6G2341523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eba61a47a512aa77cc66f0ec56a5d07c9538e6bcb78d5d5afd0ceda87d0ba21. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:31Z), 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/QZTAX2391085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410b818063e60c2aecda46e4446da57284a9196f7f01209bc8b85e7c1cda9b3c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:40Z), 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/QZTB32460493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8a0b0f44e40265306dbe37e68599fb7ae3a2071015e0da7d3e6ab248e106d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:33:03Z), 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/QZZ7M2474948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec021e5255817faf9c534048391eb0eb0d3305c38cc7420add66d020dd6b3f9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZFYZ2542548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51ef206ea84747f73930aa649d0a6929326581f96c9f980550052145924051. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHN92544589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b445724fe731dbc6981eb3ea1dc8ebe7ec200d1df7e270f0e5fcd00abc34972. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTAZ2578021.