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 0x95602e1ae2b2797a138e2acedaf07fc5499596f1de2ad43c0af2b3a6cbd41e90. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b00677a3-a41d-48cd-83a0-9c1b78953606.json and https://artists.proofprofile.net/proofs/artist/b00677a3-a41d-48cd-83a0-9c1b78953606.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 0x7179cc6c853c36e7dd96a5ae36e55b70c4d640779f369119d0b188333e210732. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZNWV2257205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98369493bc13c770cb2ccc185cca898241953eec2c1308db72809c88a224316. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:20Z), 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/QZRP52245789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1270938a3737b9b852d900558d4312d2977863c42574bcdfe16a785b2e411a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP52245790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bad39d12d2c4d8ade7b0ff4153d96e1ddff1a049a3b27962bbc07227c5a7dd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZRP52245791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9dec1e7b46345fcdfda993d03ca4c61e0cdb26be634afd1a7ee73558f58257. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAY2205191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c428e88c7711cd49eec64d4a9787b85ad124afdbf96658793c8017a0ebcd85b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:28:23Z), 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/QZK6J2374098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3285d533e003c6e85fd7d409c01661478c1684809468eef8e8572f40d649c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMER2406291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210e1b61d5cc70451745788fae14368cd71f64304dc28ab374fb1aba7b1a2148. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTB92419248.