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 0x818e4da5f568aa5f25d7cdc12cbf64911046c0036c2f8a45aeb4b0ab934d1bae. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fadc220-84fb-4d2d-b320-8fb53c5f5528.json and https://artists.proofprofile.net/proofs/artist/9fadc220-84fb-4d2d-b320-8fb53c5f5528.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Bewitching Ballad of the Black Forest
The Mysterious Madrigal of the Medusa’s Mirror
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 0xb12c257f0eb02c41076b357bbebebde0289c7ced1974dd08042bebc9009fbcf1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXBAV2216152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d30db71c9242926ec0e0bdd0a1151f20667dda3f10f5aeac83dcdaab38d1f04. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:23Z), 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/GXBAV2215185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f70e987b057676d955a301aa6ffd0f924ad191e0b1c22ffb2fa5853a58bbb15. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:08Z), 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/GXBAV2262877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a18832d1c80a87012940f508258febe6363fbcb093446e162be5cb2b15f077. 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/GXD7V2258981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981024d76b1e938eb1f362bfe9e10d649e9c23c3bdda58cb6c3e7346045fd0f6. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GXD7V2475681.