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 0x0bc1342d6bef930efc9ba8ba3c06983f97a0d860dcc185ad5e2977e0c87c0812. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49d952c3-1648-4806-b5a1-1b1b06f930c4.json and https://artists.proofprofile.net/proofs/artist/49d952c3-1648-4806-b5a1-1b1b06f930c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Giuditta di Cambridge: Dormi, o fulmine di guerra (Arr. for Voice, 2 Baroque Violins & Organ by Anonymous)
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 0xb2c44991309a6cb87b712c99b8a06b2dd76b69bce3a52e26765f842ed4c4875d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES17B2400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d8f67ae0578a557dedd6618351ef85becb534a917d7d7e1e22c708c76179b. 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/ES17B2400879.
Now That the Sun Hath Veiled His Light, Z. 193 "An Evening Hymn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fe71c038179021bb0ab10231f678203d4d9771ffb1338d8e2eea4917d9ca1c. 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/ES17B2400887.
Dove fuggo à che penso: No. 1, Dove fuggo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53cfe6a3617d92c09a97f851547b3127037d4ccf4415a437a7c3c24d89c110. 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/ES17B2400655.
Dove fuggo à che penso: No. 2, Risolvi ò peccatore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e7621b826bc5c6c9f8eb9db9f28ba234740ea7ef788b029312ce4f412b2d77. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES17B2400656.
Dove fuggo à che penso: No. 3, Dunque che fai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8979f20f02eb8f6684ce55d66ddb9807f6004599242ee6b9c1ad206f6cb211f7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES17B2400657.
Dove fuggo à che penso: No. 4, Tu mio Dio che in duro legno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153999cb8652a22c0bb2639a08daeb9f9b5b7fac8b83c3ef8c7addc4848b14b5. 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/ES17B2400658.
Dove fuggo à che penso: No. 6, Piangerò mio caro Dio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998b3bd770d1facd0c5c500968bcff3e6a4df2e17bd1c1a949c2e91092ee35a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES17B2400660.
S'offendesti il mio Signor: No. 2, S'offendesti il mio Signor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae35f559222de4dd2f3f88d50ec5e1a0122251b4f3d4ae37e0e8014c71c7f27. 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/ES17B2400662.