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 0x576ef05963e893889a1de068ae87d8639089435ffaf2de3b2c4456577b3d46c1. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2caf9e4-de56-477a-b478-c9aae783dbde.json and https://artists.proofprofile.net/proofs/artist/a2caf9e4-de56-477a-b478-c9aae783dbde.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 0x243e887cf02c7db8b3e183931f9daa6f09a54135df7b21650831dba68929ce0f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:28Z), 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/TCAJM2559320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7723f912763f5fb2b422c12cdeb02f3f32b802a7b29a43f06fff08b62413d2f6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:39Z), 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/TCAJN2571153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7827047663cff13a1db5fc67048cbcb6f3d57812c8fe32c200a25e9761be7a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAJR2539300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5958c8c1b8ebf41f1ea73e717260079ebfd3f11c81dee784bfab1bc1db8468cc. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJQ2597171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d2ed8d1eae184dd528ef75000314189f587cbfd4091b176912a44ce82b3c3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:33Z), 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/TCAJX2578027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb379db83e08b17850c465be7d93aa6b3831c9648f5d9422b7852d322fcc03c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT65W2564233.