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 0x4c25175e14daa2c7d1fd804ee791d57c1d0c74bf9a46b7e2097a212c9855ee0a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35eaf5d0-9146-434f-bc4b-2120600b25f7.json and https://artists.proofprofile.net/proofs/artist/35eaf5d0-9146-434f-bc4b-2120600b25f7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ae78b60e8db2a3493cf0964471b544b6c0dcf7f53141d35ea736d8859cfca. 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/USSM11906167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db2893dd82ab35cbed7fa348ccbf6f0b2c3b19500dd96562d471e90d23099a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USSM11906159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8946170d621e23cfc5a7403b177a4d070bb7f8fa67bed5028145b8904d286cf1. 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/USSM11906170.
Farnace, RV 711, Act II, Scene 5: Gelido in ogni vena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf5569da6fcc5bae4b32df9f57b6d3e275276f6f931b8922fd23b266cf027f1. 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/USSM11909101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e653541c22995d8c9635e84ef0fcd6460d68704202f6a2cce245f29646a500a. 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/USSM11906168.
Il trionfo del tempo e del disinganno, HWV 46a, Part II: Tu del ciel ministro eletto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e6e9591df2e466d818c30a97c66fbc9f3b9ae80e410f405a1db4515eaa1074. 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/USSM11906166.
Rinaldo, HWV 7a, Act I, Scene 5: Furie terribili!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e6f47786b43ee8b490e2324bf1c8a87358f0fd2898806a3524eb59bbdb234c. 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/USSM11806629.
Giulio Cesare in Egitto, HWV 17, Act III, Scene 3: Piangerò la sorte mia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14161952af874c8106a643a519e418d9cb9790427ca6d1fa93d2ae907a6f8261. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USSM11806630.
Amadigi di Gaula, HWV 11, Act I, Scene 4: Ah, spietato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701e5903120c6bb8226a7a42f403c32a8d3808b36e106f19420fdfcfd54651a3. 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/USSM11806632.
Semiramide riconosciuta, Act III, Scene 4: In braccio a mille furie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ea0cb8f42d69ea1ddd4e23f6690246f9dec88d1fd5dbed39a170a317557fc6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USSM11906169.
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
San Nicola di Bari: M'incateni e se mi sciogli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc775877c7fba38a2fa3b840ca934b4eb5e65517dee9fa2a2d542b2d9fb4ff4. 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/USSM11906163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b11fc000437b601a0de25b358237c6009c017be55c185756110a109b54883. 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/USSM11906165.
Matthäuspassion, BWV 244, Pt. II, No. 39: Erbarme dich, mein Gott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7331d92b598358a2f4b4d2f4ee28e8127d09ca83c427f03a027a7ba6b56d6dd3. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USSM11906162.
La Resurrezione, HWV47, Part I: Disserratevi, o porte d'Averno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd7b2d1a79d0f6f45803308a6a1b06442c3b7fe2558f52583403687d112d3d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USSM11806631.
Il trionfo del tempo e del disinganno, HWV 46a, Part II: Come nembo che fugge col vento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8eeda5d6db9719f28b28eba294498bb494787c1650522c577b32cfcbaa886b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USSM11806633.
Serse, HWV 40, Act I, Scene 1: Ombra mai fu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0121cb849e7471ed08767a6db6560b958f4ed99119c0a5eb783fa2492d0e17a0. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USSM11806634.