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 0xaf01777526395ebe037e615bf56ee5337623419080e2580820490796ae834de6. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3ef1ec7-df40-4823-a7c2-ddf775dd44f0.json and https://artists.proofprofile.net/proofs/artist/d3ef1ec7-df40-4823-a7c2-ddf775dd44f0.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 0xc7f881809f1a6197ebcf223155692f96fa9bf44ce7aefd309a1a1d0fd26d1073. 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/QZDA82426895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb79faa21eff5691e037ef176c44c827e9c6e51deb3c8b9f704d8373ce66d1f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:11:07Z), 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/QZDA82426896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd35fa4e0ac636bcf968fda22d9d03c950a84bcc3df93a30a395b13942076a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:49Z), 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/QZDA82426897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b01de959d5b6d01fdadad25196eedf8b5dfe4be5c8f0378df22098aa106c5e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:12Z), 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/QZWFM2398472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b0ccf0ea43f7be3388e15c634672322f1d1891903fed951e686732faa3b1b0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA82426899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4014c1462519b4b216ed3158093b7e0b5d9d5ea92b598a968738d2ecf07f8b74. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFK2521737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6795d8da3238168289576e32615cf6253db111b97c7dbc5568740d6059fc6257. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFK2521738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7557833ee49c474ccd7a42c5fe8eaccdf5f8543e2fe806a9352d08205ac59866. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFK2521739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47fc98ab581cfa6dd08b82922104c635052bc870d405685a885a5cb18c6be51. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:43Z), 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/QZWFK2521740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d098743adc149f470f155082db52be07287bd89af8348316e0098fa4aa0f98b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFK2521741.