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 0xfd5ce95cd119a07020dc53451435fe86498d9b5b022576d9ab5a74fc3721aea5. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fc00e0b-27dc-41dc-afc0-3434af770115.json and https://artists.proofprofile.net/proofs/artist/1fc00e0b-27dc-41dc-afc0-3434af770115.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orlando Furioso, RV 728, Act II, Scene 6: Chiara al pari di lucida stella
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 0x678ef8b2ea447402d53820554bba1dfb341a1994c040648066f0249f88a93d11. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX290400630.
Orlando Furioso, RV 728, Act I, Scene 1: Un raggio di speme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d60bbf03711c2c34e3ded91bfe18b11e565939665cea71f590889d56c2cf7ef. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FRX290400280.
Orlando Furioso, RV 728, Act I, Scene 8: Tu sei degl'occhi mei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed36eceddbb27bd64372f0ae249fab200ec8ceb0936d2a8aab6da648d4c0e75d. 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/FRX290400400.
Il Giustino, RV 717, Act I, Scene 6: Cieli, Numi, soccorso! (Giustino, Leocasta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b3de9211e4bb0b828685ddae23e36a547bb9ae9a139ec1ce51e08c086ba6f3. 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/FRZ131811180.
Il Giustino, RV 717, Act I, Scene 6: Nacque al bosco e nacque al prato (Leocasta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad4ee3aa88ae626d2c14db90ad395f676d48e9f1a3090f65df133c3c27388a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ131811190.
Orlando Furioso, RV 728, Act I, Scene 1: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3320d1e3e9e88fcccf134c4ad47e5fcd541445e4bf86dd9155329202f2f9c8b4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX290400270.
Il Giustino, RV 717, Act I, Scene 9: Oh come volentier ti stringo al seno (Leocasta, Andronico, Giustino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea2d31ea797d11cacaf72cdf07f6ad523ea640a0cd5bf6e2efb9f042aced681. 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/FRZ131811270.
Il Giustino, RV 717, Act I, Scene 10: Del greco impero ai danni (Leocasta, Anastasio, Giustino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf684a8f3f60dcbbfea1b6ee8886ae5b54e32aadd4dab04c73d99a9ed031b58a6. 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/FRZ131811280.
Orlando Furioso, RV 728, Act I, Scene 6: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432aabdfdbe6fa424a5d898315697fdc9ea89cf6dc18af752889adf58c3b6bca. 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/FRX290400370.
Orlando Furioso, RV 728, Act I, Scene 7: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8f33c9be53b0badfcab797d873293d5342172aedbebcb47b09670fdd1a716c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRX290400380.
Orlando Furioso, RV 728, Act I, Scene 8: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e336560750f73a816f0082e6bfac8d2fb5ceb3abb7634c243887fb71d4d2b6. 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/FRX290400390.
Il Giustino, RV 717, Act II, Scene 7: Flavia, non ho più core (Leocasta, Andronico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c07c441cd99c35aa17b5dc90ec53fe47a077ffbb3b7ce5070f953233274ba11. 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/FRZ131811500.
Orlando Furioso, RV 728, Act II, Scene 5: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8144b2ee712d95e6a6beec5b3afdbeacb37743bcab6f4e55e4ffa0cd6abde7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX290400600.
Orlando Furioso, RV 728, Act II, Scene 6: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2bd685a43721a10cc6d0057c8d1f237660bedb386fd73b3820aac3fce68c0f. 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/FRX290400620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631bc3b09f036b16dfaac7efa9a07221931f420972ce56f74ee745674b88cb0. 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/FRX290400640.
Orlando Furioso, RV 728, Act II, Scene 7: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d39c719302f1b1d0008b541506a26a4915cb4afa8a8f954a1977d1688e51c8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRX290400650.
Orlando Furioso, RV 728, Act II, Scene 8: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21b54175996a0d7cff894c9f653e1ad6ba2801dde419f9602b90f5dfdc86711. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX290400660.