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 0x68ba4a47307d7c6766f409b14d5f8edb7645fcf4183b4d29e1c160f2d09a78d9. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f5bcb02-e30d-4fdb-a4c4-3a5a6d79f034.json and https://artists.proofprofile.net/proofs/artist/7f5bcb02-e30d-4fdb-a4c4-3a5a6d79f034.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 0x2456fc1d1fc0aaf97adc940a87ba7f4d65613e03f5ad63eda036d03ecede5fdf. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:24:53Z), 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/QZS672429184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7412d692fa6ca30ed569ed5b64a9fd16a36835be623fa603d48be78e63a57306. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:32Z), 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/QZMHN2425359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b7c06be60e3452184a6046e4635af2a196212437e66c94ae6839060883493. 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/QZS672507684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3fb9c9f52bd19e0cd87b58b729f5b3437068e9cb7ec88cdb87de005e55123a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZJRC2525662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7bd9ef5b89376c12f72d0fb260c6db88acd83a14642dcbe43e7fe61d00412. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:01Z), 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/QZWFT2574864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7812074df7670e9033cc04b95e76ef9542bc4fce3ba905e4111da9e1c3c5d0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:34Z), 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/QZS662503059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ef564e4acc23fdc73e50fc395c9efef4980d5ece5e1c55224f92ffc8121a7. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:35Z), 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/QT3F92548509.