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 0x1d9d63663f601e96906facde8965bf83ab555f7052a2c7f37e0d36ef08cddd13. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ff9ee9d-70ee-4951-b6e5-29a1e338e597.json and https://artists.proofprofile.net/proofs/artist/5ff9ee9d-70ee-4951-b6e5-29a1e338e597.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orfeo ed Euridice, Wq. 30: Qual vita è questa mai
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 0xf878ba2061f46908751411b09b6e9fe0759d82b38b53e5a737aa18c1a93aa6df. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEN962002811.
Orfeo ed Euridice, Wq. 30: Che fiero momento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627822533bb6f15e17b95e38d812083c2e17e6f239aec2978438bce6094089a0. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEN962002812.
La Serva Padrona: Stizzoso, mio stizzoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbe5e61cb7e39f42acf4844b4dde215c654bad4b02782eb10d1fd8923020742. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN962002800.
Giulio Cesare, HWV 17: Se pietà di me non senti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a1c92184471a052817ef56e78a4c9e994704fb3e7f7b5e3364b8ed19f46d1c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEN962002820.
Idomeneo, K. 366: Quando avran fine omai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4807d2f15070d9263e0ab1ceda0de04ba0f088d104f5613aaaaf60f2f662a7. 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/DEN962002851.
Idomeneo, K. 366: Padre, germani, addio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab585a01a54a475bec63d3e243733a7d628fc4428de0d64eee12ee99743a0696. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN962002852.