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 0x644deeb4148ac6afb20df36c27955522dd9a5bc1f9a854fb9b118f84809eff40. 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/482e108a-5bcb-4ab9-87ef-ac556f5d1aa9.json and https://artists.proofprofile.net/proofs/artist/482e108a-5bcb-4ab9-87ef-ac556f5d1aa9.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 0x6115f57380b55dea472464e7daffa2e5edd807a280727e3ac3b6b2d475d5b574. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6K2565357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50272957f2d9f11559b0e6660b3fb08859d234ddf9b9c7e96e41d15da613d0ea. 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/QZHN92542306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64e37ca0a548e9919b07394940ab966ed5a65170e45a466fdf72e2f5901573b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:27Z), 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/QZFZ62564271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de56564a77aff5832bcef431131ff934913cad1eecbd86d8669273df733d6fe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92542307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8e1a3a8b38752621f2c7b54b4d1872e385cceef7d5a7b053802fca51fc24b2. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:20:46Z), 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/QZHN92542308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5906e23e58967241cb10cdd4c4af1f433abfe4db3cc8579cae1162749a8176a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:31Z), 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/QZHN92542310.