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 0x79c068279ac3aa2ef6d692f16513e76af6c560bebd71924c2414cae84ea63f66. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7319354-ec48-438b-9520-f431c82a7314.json and https://artists.proofprofile.net/proofs/artist/a7319354-ec48-438b-9520-f431c82a7314.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La sonnambula, Act I: Io più di tutti, o Amina
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 0x70c686b9ce8bb100b2eb1075bd569d7730d2f3f6c1c8cc794788c963bc159505. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBA0842408.
La sonnambula, Act I: Ah! Vorrei trovar parola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a4087988541f0b8d560e82026598870954073fa1ecc469572be5278229c9f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBA0842411.
La sonnambula, Act I: Contezza del paese avete voi, signor?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cc17d395f1093a5a1017a6fbbf0881635d3f6a4dc0a82e2f16fab7625e198b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBBA0842414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7157c6dfe054b4d7ce83dd42245259a18a01219cfe514f33e2ddd72903403cf4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBBBA0842416.
La Sonnambula / Act 1: D'un pensiero e d'un accento rea non son
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47972516c3036e3f035ed1dc7a1d1b18f47206934e8e7d1eead370553b49845a. 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/GBBBA0842425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2e03e11b612aa1ad9b9dea4a47b5559f73c98de9c5ab621db4fd27d052d8f. 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/GBBBA0842426.
La Sonnambula / Act 2: Reggimi, o buona madre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20557da67162de441eb1b2473a08aabae3f8da3a03d7b84b8dcb428058900da7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBBBA0842430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6664525a3108cbb133bf09e60b713f54caa978f34b011f2357261292828b703. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBBBA0842432.
La Sonnambula / Act 2: Signor Conte, agli occhi miei negar fede non poss'io
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e62f3607b9e5ce2990c70f3a38631d42a4b45a7a267e022f15d8d3a81b49341. 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/GBBBA0842438.
La Sonnambula / Act 2: Lisa mendace anch'essa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467ac9b6ae79b2d37c584cb23bf6840f15fc30a037930a4a40317dd993aca03c. 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/GBBBA0842439.
La Sonnambula / Act 2: Oh se una volta sola rivederlo io potessi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c4abce4b62cb0d2ecb01e02ee38f58e43c54e94e03f25b5762421768bb478. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBBA0842441.
La Sonnambula / Act 2: Signor?... chi creder deggio?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8653041d4e1f16241f739f813e3800ecf33557800ca57afe90f32dd0ac67c689. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBBBA0842440.
Norma (Ed. Biondi & Minasi), Act I Scene 2: Vanne, e li cela entrambi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db44c9bf9a525d8bb31b3f1560fe637eca8f43f43e4b02568f9dbc5d816cb05. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF071340115.
Norma / Act 2 Scene 1: Scena – Introduzione - "Dormono entrambi" (Critical Ed. Maurizio Biondi and Riccardo Minasi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f334689b66be9f7092771f38ea2ec863cc51071ba50cc324b01594306cbda2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF071340122.
Norma / Act 2 Scene 3: "Ei tornerà" (Critical Ed. Maurizio Biondi and Riccardo Minasi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4dce553052261dca4920da5520948ab67010d89b018a4fe32c882ee839a51c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF071340130.
Norma / Act 2 Scene 3: "Né compi il rito, o Norma?" (Critical Ed. Maurizio Biondi and Riccardo Minasi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be291404df4c87a6ebb6ae2424645099d7dd28576f398311513a35e978dd0c4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBF071340133.