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 0x60ef3f3a75cea31d087d5a42161653843373d07688b14e2c780463134dd69df8. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/055a792f-d869-4cf9-a2bd-07966e77410b.json and https://artists.proofprofile.net/proofs/artist/055a792f-d869-4cf9-a2bd-07966e77410b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xa4096ffcc789817a87eb958d220dc242236e154c945ab6c0e0250634c3e7fa06. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078712070 — a six-check JSON result.
Ernani / Part 1: Mio signor, dolente i sono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27f2711a9cbd9d46c0809a4b701a18e7631a181ec385b1a8cd6629c4a94b1b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078712080 — a six-check JSON result.
Ernani / Part 2: Vieni meco, sol di rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9960367521de1f1b1fc7a1141fdd2af9c859d254485fed3355141bd261b13f83. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078712180 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe290d0d386ed9afac1102ee51c7a7d6fd37de38414a62d56353c50a3e63d5224. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078712210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360368ea6961d2967efac0b43c5ba103bf6978f2553a4c7974762eba868ca37a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078712260 — a six-check JSON result.
Ernani / Part 3: O sommo Carlo, più del tuo nome
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb08fdf0518a1f35a6db9b0b2a5037f839235b18e2298d62110044fae96670d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078712280 — a six-check JSON result.
Elgar: Coronation Ode, Op. 44: Song and Chorus. "Britain, Ask of Thyself"
Cambridge University Musical Society Chorus
The Band of the Royal Military School of Music, Kneller Hall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179640905f1199abffec116192d5c92e8bbd63082850e45cad20bb4d6ce5cbec. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700639 — a six-check JSON result.
Britten: Rejoice in the Lamb, Op. 30: II. For I Will Consider My Cat Jeoffry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dae5547c995cb4837a71e03fc47c24aeb53bc1b4ef7d832f8e50a636c1b6a59. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700620 — a six-check JSON result.
Handel: Dixit Dominus, HWV 232: VI. Dominus a dextris tuis
Handel: Dixit Dominus, HWV 232 & Coronation Anthem No. 1, HWV 258 "Zadok the Priest"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2044a6ee97ba11a8c52ba7d40e422024eb51ce09931d30e56c761d7e5f41e7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ207602206 — a six-check JSON result.