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 0x90ac44673d44e2f6748dfb45b0a7451071e3e7a78ce11bce8deae158037add5d. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d7bba6f-2509-42ca-aa16-b4fb85f3b495.json and https://artists.proofprofile.net/proofs/artist/0d7bba6f-2509-42ca-aa16-b4fb85f3b495.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra del Maggio Musicale Fiorentino
Ettore Bastianini: A Discographic Career (Recorded 1955-1962)
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 0xe931513285086652057fcd890eb4fa82643b225ef62304b5a76f60b24acc9203. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITCC51101612.
Rigoletto / Act 1: Ch'io gli parli (Monterone, Duca, Borsa, Rigoletto, Marullo, Ceprano, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba5df811053bbb8b3b13018e4c96d50a53c20209bc4ba78d571914ff28dfe6. 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/DEF056431024.
Rigoletto / Act 1: Scena e Coro - Finale I. "Riedo!... perché?" / "Silencio...all'opra" (Rigoletto, Borsa, Ceprano, Marullo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3e6d25030f18f04cdda68db9cfb05e4918d72a90ca5f7fc5d12f3bad9e03ef. 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/DEF056431039.
Rigoletto / Act 1: "Questa o quella" - "Partite? ... Crudele" - "In testa che avete, Signor di Ceprano?" - "Gran nuova! Gran nuova!" - "Ah, più di Ceprano"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f05e1da1a180231e943848361b4cb3110c068d8e91e5a1dd54cc04f06115c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEF056431023.
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
Rigoletto / Act 1: "Gualtier Maldè...Caro nome che il mio cor" - "È là"/"Miratela"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1f7c23776a4a15e4d2b10d8849cde9eefdfbb7a30e76ed482aafba48c3cb45. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEF056431004.