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 0x8fa0971df50d03b9be06e6ecdb7e849de0c869f88f6f8edd5b8788333e9ace83. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fcf63ca-9a2b-4120-8fb0-4f9d78ef6783.json and https://artists.proofprofile.net/proofs/artist/5fcf63ca-9a2b-4120-8fb0-4f9d78ef6783.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lucrezia, HWV 45 : Aria "Alla salma infedel"
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 0x8877549877ed4b9b1fc4a27d3f69c4cc33b8d1216e5291d05f9186b1c72ca8d3. 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/FR50X2076508.
Amadigi Di Gaulo, HWV 11 : Aria "Desterò dall'empia Dite"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e613dec3bcfb5f3027bbd142ebfbb263061abfacc3a2cfbf530046671042b78. 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/FR50X2076511.
Alcina, HWV 34: Aria "Tornami a vagheggiar"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab22a41f5867c5c5234ddab2460831633a74b0f586143cfd4b5b734a38faf7. 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/FR50X2076513.
Alcina, HWV 34: Aria "Lascia ch'io pianga"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35263acb131166b7c92b4c3a92958c0145cdcd27655bf14151ee2d25f47c830. 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/FR50X2076514.
Lotario, HWV 26: Aria "Scherza in mar la navicella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ac2c26bbc0b78543cdce4469aec4a85ca7579fef93b71a20d07f3fdd022f1d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR50X2076501.
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
Rinaldo, HWV 7a : Aria "Il vostro maggio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08bab8326b24bc829a9e445216d30382d4676a9dcb868b9aedba92f241b7917. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR50X2076502.
Giulio Cesare In Egitto, HWV 17: Aria "Da tempeste"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5874c5773c1170d1872cb1e2df66afb980b193d9645ee9808946cbbb303efd9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR50X2076503.
Concerto Grosso No. 4 in A Minor, Op. 6: I. Larghetto affetuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef28da27c8569c1db9b276e580bf82d12d26cdd9c116f982f6416caa2cb724. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR50X2076504.
Giulio Cesare In Egitto, HWV 17: Aria "Piangerò la sorte mia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d36fdd71e1c04b27f250c1f99d52bb30f15eaa2e574e109f2341fd5d01cbd47. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR50X2076506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5dbd956795901c5ad6d89404af831ddf2bd3a75cf5ca080ee62905e7dbd5d3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR50X2076509.