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 0x09078e39020ee2d943f3df953426fbd4f33bed15f4114cda333610f28f83b56b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3b83260-9187-4137-b14b-ad948c22982d.json and https://artists.proofprofile.net/proofs/artist/b3b83260-9187-4137-b14b-ad948c22982d.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 0x9a1f4e1054ab63877ff7222965ea1b6a2d053fd5b952831a4a6e77f1331593b8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLP421700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2e7a8c6a179d3143b55085d717115f10b898794d3220bd683e5949cee0195e. 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/NLW2R1720649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98600f32846bb106c91f0361c26d721f795dc0bd3c2eb9c1ee8db6f58907aae6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLQ901600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be1ab106cde86afe238eaef149f2a952ab40a8b52a798a1c089b1e32bd6bba. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:48:42Z), 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/NLY8J2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa630e4842388faf74d883ed6335e906bc7b55b2d4b15c64fbded572d6f148a54. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:02:28Z), 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/NL4NG2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdda226201f6ef16861cd8b1b2af5152d165be4e9b746cb94a3ffe7d1d73206. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:55Z), 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/QZHN52248146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad903399b2d20ed9ea84d8b74438aeb0310e8c7801fac31fc33225dcf5f710b. 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/NL4NG2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4788694308008c49c54dec6afa97d92b3f192a3873c1cae24515a962fc1716ce. 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/NL4NG2400040.