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 0xd39f5dbd48c64bb34ed23161bfdc682a3725d8297d3f7e09073cedccd0e5e675. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d60f01e-438e-476e-b37c-8df008857464.json and https://artists.proofprofile.net/proofs/artist/9d60f01e-438e-476e-b37c-8df008857464.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 0x0ee2823cf3606ab26079bbb165e1b4c3defecb1c9f88297e92118a9a017a49f0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:15Z), 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/QZHZ51938987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d9dfee944d93fd795f8e454c69c91007dc507e0eb6dc012dcedb753b7c9bc3. 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/QZHZ51938989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4282fadee92bd5987a4d52861a3fb5d4af1f67d1ece6f7baee7f0171ff2f9f6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:17:47Z), 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/QZHZ51938990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e07bd6e3f649065a35b7a14bf15aeb5f373af31a9b7b651cce34bfefbea2986. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHZ51938992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9306bfce4a34ea7cf26d886dadb99e52f7e3641824c58fd7b06c29814cd6e19. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:02:54Z), 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/QZHZ51938997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fc95acfe0f86eceec65f4206bfac6f54a37c4c82098c0f7070e60a4c22dffc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:59Z), 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/QZHZ51938998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ee4c8a2df157589bdacf67fb243052d4d6a08f0afa5f7b54a7c30c5ce57462. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHZ51939000.