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 0x6861dca7dbcb09a7c0586997de6d92e3b3638cbc5230a899846bf764875556fb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c10299f2-b20f-416f-aecd-035fdef85bca.json and https://artists.proofprofile.net/proofs/artist/c10299f2-b20f-416f-aecd-035fdef85bca.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 0x7547bbf5a38e3ad469fbf89982126b6e5c338e30008553ffc64dbe1ff17f836e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ662427720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159129e469b08f534fb122a3fa1bc5b115c1da6d2a1aa3a20a78985b33ccb0a6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:41Z), 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/QZK6K2456414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15daca571065d274665627525b69158f7bc43570d061cbf403532a3a057f14a9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:11Z), 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/QT3EZ2442463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f75184d1e62afc866f6f4197ce138c99cc2263279a34fef48a97b0fdc0c2df. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZDA72518556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f5bdc94991502280f818528e7472f548b5a92e55a70ac95e0cc0a023b5cff. 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/QZWDW2553277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b2de1bc09431ef93393d1c75a4029c3238257ab924236949ece25c7e2adff9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWDW2568226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634dbcf68e56218eaee2c615492f3f9fa3a68685ce6d399a3c0a1fd78540a89. 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/QZWDW2581983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a9b008b9efe0615c094b4b3d06ea39683d27760bf0665fe77ea18dd9cd1a11. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:12Z), 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/QZZ7V2567522.