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 0x2424accfa7fc3521591d63806851b5b55f8600d243c9004eac9eb8b624e20b1d. 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/4cc61428-5bd2-4634-add0-65cb2e96b0e8.json and https://artists.proofprofile.net/proofs/artist/4cc61428-5bd2-4634-add0-65cb2e96b0e8.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 0x00ab5e9687268b63aee1f3714f5fe54c109e4398b9429f91fadd2cb3099d2ee9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR6V80634080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e33e510e7fd164a634a209af7f07f4f6d3a675cf9a57cc64bbf39b6cc5918. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/FR6V80634087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470f53ba49b39d4d255ffc0df521a8426a8d3d023edb0f120bd52f3e3027feff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR6V80728080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1ee12e21bea4fc3bf701fccb2b6d5d56451bf7cb9f2e0ec0ce340b8977e4c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR6V80728081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab253aca70d8b6e0fe33bf72ce5535ea42d17d57aefb9aaa3711b9264fcd182. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:24Z), 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/FR6V80728084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ee381dbc4df42c99f3da2867d4fd176d9f433ce936f0cc459354bd3ffd0ad. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/FR6V80728086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2c305d4d88041d47b3cd4be0aa6a52072c04bdc99a9cb205cfa1f1a65f36db. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:17Z), 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/FR6V80728088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dd1f77b733de3f6627f265fb16e8655e17783ef224fad33fbb172b1f7c09f0. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/FR6V80728091.
Antonio Grosso Band e Orchestra La Paganini