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 0xb605772dbe2f43ccbda49c13bd6efa84398e755bd8e1fd8a452f30f3609b2bda. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ae2e71a-1177-45e4-a2dc-9c94eab46c73.json and https://artists.proofprofile.net/proofs/artist/3ae2e71a-1177-45e4-a2dc-9c94eab46c73.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 0xc041f6cf7c239534310b23b7d7e76cdb484c4db00f47d3290e8f18f097529d87. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEAF75109853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3eb854536b2d7f5c6867e4161a2c99aae6fed757d57b4d4e6d785345910233. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ITQ921000090.
Scarpe rosse impolverate (Dusty Red Shoes) [4MuLA Remixes]
Peppe Voltarelli Live Café Vinilo Buenos Aires
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7536543ffd7bfc38ed6e16d8542c224bd4fc7a8627952a0ceb845c936e946a8f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ITQ241601274.
Capo Verde terra d'amore Vol. 3 (Canzoni di Cesaria Evora e Teofilo Chantre in italiano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36783454d6fb596df1e8dbb33d29ce9a7d4815084f69b0e4a979e4f013402a21. 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/ITK601102019.
Segreti al chiar di luna (Segredo Na Luar)
Capo Verde terra d'amore Vol. 1 (Canzoni di Cesaria Evora e Teofilo Chantre in italiano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2934ccc8901c215bfdb40bc690793ba7801900daff7ab2f089b75e6b0982341. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ITK601102005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc77b00eb9f4f5b4aa5190d36560cee9cfe6b935d87d710ffac9c2e1ee7862ac. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITDF92100015.