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 0x83a30bf636ef10d1389c5626548fb860434df375598ec31bdd8b7bb2c129334d. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7a6ed9d-56da-4c25-b119-876e17815325.json and https://artists.proofprofile.net/proofs/artist/a7a6ed9d-56da-4c25-b119-876e17815325.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 0x6ff14581170ead9962c477bff49dca8971118ff3776506528dd3a9272e827e2b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7Q2420780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d193a50029739f55d1484b4c789fc4696542ab4e3dbdca7a0339985c96b961. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:05Z), 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/QZZ7Q2420781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8140537f52d77cd91955f12212814ad89d67e1d38aa8f1d96903afe82114674. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7Q2420782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa774cd34d79fe03f9bc9c60f7830a38e078072301252e5297aa12b8f8ba5528e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:18Z), 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/QZZ7Q2420783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a906e625eb1980df5c8b3575eef8988ac2866970d6937a1e1dfd6fc1be52fb9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:45:47Z), 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/QZZ7Q2420784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71807df640e5e657c60134ed9942a05c6881b8ea4c93305940212f631e4462b1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZZ7Q2420785.