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 0x6fa122e565f3737c4be014a3ad38e03a27224e063e0a07540a106882f05fdfa1. 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/18d4e30a-c92f-408c-bd09-3bb5f1f83ec1.json and https://artists.proofprofile.net/proofs/artist/18d4e30a-c92f-408c-bd09-3bb5f1f83ec1.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 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 0xc922acd051fecdb28fcd9d8b687bcda579af7c2ee119d8eed4086e2b17f6c4cc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA370535621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4707487ccc1f1badfe6f006eb0e78fba7d18da0bee0523ea4afa701259ca1e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USA370535629.
Medley: Love In Portofino/Addormentarmi Cosi'/Rose Rosse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaef827b82c8c2c02b76167d3752faa1ffb9be70d5afbe8482691de041a4036. 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/USA370540179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaf5c4e4f6c1e89e8d5d2ec1852fc7b4166de6fca358bd58ec24e7f17ea0809. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USA370540182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421a95336ce0970e9b65dec33d87d3eddbe4b6af91eab621e32d8eb204ac109. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USA370540183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850b6cced9bec0d93eb2c3e525b657aa14ed85decb7d24bc4934fe8f01920d1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USA370540188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9200200a26a70bdf751559be70996e930057c04548ebc366945cc1822230e655. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA370540193.
Fisarmonica italiana (Tango, valzer, polka, mazurca)
I Maestri della Fisarmonica, Vol. 7 (Claudio Ranalli Vol. 7)
Fisarmonica Compilation, Vol. 2 (70 brani fisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29789d98c8aaefbc3f8a6ce55cfad2644553dbf4ce07df8a1bd597eb365bfb7c. 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/IT0150300402.