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 0x379e84625c2ff23401e3877e20edf49ceab3e9e6975a85b1b94ba8c06e2a85f4. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bfc25d3-f558-4174-8776-ec0a66b7e6ce.json and https://artists.proofprofile.net/proofs/artist/2bfc25d3-f558-4174-8776-ec0a66b7e6ce.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 0xf06783789ac840840faa918ee84ebe9d823df6a71f1d732aeb2d56317ba32e47. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZHNA2006135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c07356ef3d7fa7c8fb9cc826aa46b7ed1cbe103127d16d7c4430c7c1011a35. 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/QZTAY2313501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa00daef03a83f471af2f56299cf05e0e43c49f612c07d8b2cd45268ac21f68. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:30:02Z), 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/QZDA42479678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1433acd62f10026c6db14924e31f681907579b3468805169fc8fbc6c660b23d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7T2417903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34950d0be6e621d1fc31751eb4c93d0ff9acc369f113a054c7bdfbf0568a7870. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2594405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9379a0c340d0b1295be07370bc60a59249115e0ff840726f585e8f628df3001. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:16Z), 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/QZMEQ2594407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1433acd62f10026c6db14924e31f681907579b3468805169fc8fbc6c660b23d. 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/QZZ7T2417903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e95a97d596913899106f7470f28f4eb94de252c9a629040951e7560b24d511. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMEQ2594412.