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 0x4c1f0dc09efb96658fef5e20c035fb1a42f6a2a882c653d43ce0634e54fb3dcb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8b60130-1fea-4eb7-baf9-afe25c88517b.json and https://artists.proofprofile.net/proofs/artist/f8b60130-1fea-4eb7-baf9-afe25c88517b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Agrippina, HWV 6 / Act 1: Voi, che dell'alta Roma...Il tuo figlio
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 0xb55ddbcb01ff53fd7261574a117318a67359cb95a02fc32826b4ced8446f1e8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLA509010511.
Agrippina, HWV 6 / Act 2: Coronato il crin d'alloro...Roma, più ch'il trionfo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f847ead0f291d3dab9aad4b49a30d3c6843f6eb9c9c74fea7116679aa431fc0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLA509010530.
Agrippina, HWV 6 / Act 2: Di timpani e trombe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b058cc13e2f4c3202476439401a41fa6eef6423aa501e0515151a7ae9dd08. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLA509010532.
Agrippina, HWV 6 / Act 1: La mia sorte fortunata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d484315f89d05bff580a7509a34fe82c0e4df72dfd181b02eeac50ae7483979. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA509010505.
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
Agrippina, HWV 6 / Act 1: Amici, al sen vi stringo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7697c11438bdae909d8eef16419fabe55e7ba0cc055c5fd6b53057cb8deeec8a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLA509010510.
Agrippina, HWV 6 / Act 1: Ma qual di liete trombe...Allegrezza, allegrezza!...Che sento!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6711e2e4e86e0e51d680f07f24d4226e104e2bde8fb64d0834e695f7aa56177e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLA509010512.