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 0x8de4a7cae02988425961d53cbf2973d09bf703dd067dc99709dbfcaab5e5cdbf. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4a8ecbf-7876-468d-b29f-c69d85d8c069.json and https://artists.proofprofile.net/proofs/artist/f4a8ecbf-7876-468d-b29f-c69d85d8c069.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Cenerentola, Act I: Aria. Una volta c'era un re
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 0x7cf0f5c421c4dcc9022b2998bfe82e8914be717a579d77d96c7d0422563d3067. 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/DEF057130415.
La Cenerentola, Act I: Recit. Sappiate che fra poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44278d3ccebe11df2b7dc1a220422556d34c4edaba5ae7e0f39f98f606849bc0. 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/DEF057130420.
La Cenerentola, Act I: Recit. Allegrissimamente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f363d887d80e6c4c2f5db61b9b372b72827877d8ac7c33aa89d96d17db5786. 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/DEF057130423.
La Cenerentola, Act I: Recit. Ma bravo, bravo, bravo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaf4c8cfa74ee1e1a0ce2573838177e88ad8299373734486353aed646102aae. 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/DEF057130425.
La Cenerentola, Act I: Chorus. Ah! se velata ancor - Sprezzo quei don che versa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acba9421196913304e0aa7811d31251f5d1e98fa681465b197008a494e89fe0. 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/DEF057130428.
La Cenerentola, Act I: Signora Altezza, è in tavola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71828078c8c79bc046c4b6ca02b7b2070414b77d3dbdcb37bd0639ae01fc0df3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEF057130407.
La Cenerentola, Act II: Recit. Mi par che quei birbanti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dafd45e8565636d1520aa65d6191b8c6c6af1758cedb128e4b02d6302b9967c. 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/DEF057130429.
La Cenerentola, Act II: Donna sciocca, alma di fango
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be38e737f8e9ea6fd669d919ae943fb5b9d68f392d11c28d9c7e9697f692450. 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/DEF057130438.
La Cenerentola, Act I: Duet. No, no, no non v'è
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fdd3d363c8bda8014fc4ea2a896340ee6bf1c1393d9e4981d0333bcf3f1561. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEF057130414.
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
La Cenerentola, Act I: Chorus. O figlie amabili
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead59881bae691ee1f2ec9f1afd5919fdac49cbb11bd95034af5bf9021246320. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEF057130416.
La Cenerentola, Act I: Recit. Cenerentola, presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac95bbe763646fa493051941570dadea9ad5d5cc39e6d8b7b683d63573126c1. 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/DEF057130419.
La Cenerentola, Act I: Duet. Un soave non so che
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298e012064d156ed22851457de08ecc8e1e005c637f8bd3692844f30c226ae22. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEF057130403.
La Cenerentola, Act I: Chorus. Scegli la sposa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958c39a40be0b3b53c3da43d21880d20f9b10a2a73c8b52bb48f067a9f268c32. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEF057130404.
La Cenerentola, Act I: Duet. Zitto zitto, piano piano - Quartet. Principino, dove siete?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9b896919bb9c91f1f7801561e2da9c4a48d7200d990c6aeba1ac176faf3ad4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEF057130427.
La Cenerentola, Act II: Recit. Quanto sei caro!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2273f560c07018087377d68a91e010c48ecd686f9df0560d1b5bc060a41c0f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEF057130434.
La Cenerentola, Act II: Sextet. Siete voi? - Questo è un nodo avviluppato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf246f80b3b0bff12297d7f8afd142c82ed043b19fd4ec38329f2a8e359995599. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEF057130437.