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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404a0a62b419fdf51c4a30bf834ad310d54ada0a476e6d180b42f8c10645f9df. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96cbb4cd-a899-40c5-9cac-da42175ef6ee.json and https://artists.proofprofile.net/proofs/artist/96cbb4cd-a899-40c5-9cac-da42175ef6ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Bottis: Mitilene, regina delle amazzoni: "Io piango" - "Io peno" (Mitilene, Armidoro)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697c60205d08f6b70ac5ee0cf598e4098a9f89a4dd5d123e7d14b5a07e035ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC2003405.
De Bottis: Mitilene, regina delle amazzoni: "Che farai misero core" (Mitilene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35510a1ccc3e8e1c68464ea57737443e26dfb67049154502e113aae266c0abe. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBAYC2003402.
De Bottis: Mitilene, regina delle amazzoni: "Lieti fiori, erbe odorose" (Mitilene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a24744fe43ccb6f1252d544fa575ac45637ae7e1fb5e34a52ba65c8090d11f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYC2003403.
De Bottis: Mitilene, regina delle amazzoni: "Sdegno all'armi, alle vendette" (Mitilene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5e949d8c19cd264867f15812eae67c8de7ed45c791a76c734fff3edf07a5d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC2003404.