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 0xffb0ce09132e55a749138a93a1d68a1f6a8edeb374fe5c83d4c652d4b406f1c7. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83d47ce0-9cd7-4e6c-b154-2c9b731359fa.json and https://artists.proofprofile.net/proofs/artist/83d47ce0-9cd7-4e6c-b154-2c9b731359fa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
La sonnambula, Act I: Perdona, o mia diletta, il breve indugio
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 0x9a53ec0439e95c7a408dde2675bd1ed067afa00dd956bb1f4685712ca6022fc3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842409 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931782c7bf0928f1a88c72352905217f742e1c73251cecbead98fd322a19d8ad. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842402 — a six-check JSON result.
La sonnambula, Act I: Prendi, l'anel ti dono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef438c205a43899d73c212ddb4dbf498be9cf026e3ed6fb0051d09212d6deeb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842410 — a six-check JSON result.
La sonnambula, Act I: Tutto è gioia, tutto è festa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85934a91f9f7f6ed313c2d52a5022bfb15211681faa0eb5c11d1e13a2af6d98. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842403 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2656f9221dc18e2db1e86a54601202626be48991a7c0bacf57e40b212ecce02a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBBBA0842404 — a six-check JSON result.
La sonnambula, Act I: Care compagne, e voi, tenere amici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf72f6dd65b266c683e1f706b44a0893cfb0c8ee459a92a70c29ebb3954c820. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842405 — a six-check JSON result.
La sonnambula, Act I: Io più di tutti, o Amina
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842408 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842411 — a six-check JSON result.
La sonnambula, Act I: Vi ravviso, o luoghi ameni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8c868e2d6ed05198e7d13d9dc21397681e8dbccb906c11c0cf2c65cba12df8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842413 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1f834a75dfdb8aa33d3a70b2b5d1c85cd6eb7f03ccb49ab6b4b63414c4e5ff. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842444 — a six-check JSON result.
La sonnambula, Act I: Domani, appena aggiorni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc788dbf6ea913239f9185e3d6e6e861ac369d0644fe65e1e123f6ee30388eb95. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842412 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842414 — a six-check JSON result.
La Sonnambula / Act 2: Ah! Perché non posso odiarti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13b69b3b788231af3914872a532740c97fb55eaabca5d12477b79ab9494ae1d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842433 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842416 — a six-check JSON result.
La Sonnambula / Act 1: Osservate, l'uscio è aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd824df9b0b5dd620a9ca4931d9eb1c61aa72347f10be22a098451139b933e49a. 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/GBBBA0842423 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842425 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842426 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2806e732f3c570e69c3952ba5ffcce0d4cde2df616e4fe747785bfea4a1bfb79. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842424 — a six-check JSON result.
La Sonnambula / Act 2: Qui la selva è piu folta ed ombrosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26db74d75bafbbf027d8e3ea6307f78bb12a3bbe0aef41553d3799788a3606d9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842428 — a six-check JSON result.
La Sonnambula / Act 2: De' lieti auguri a voi son grata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b9952277ab21d08661734a063066e9321808b33b728a95db47fe686c573e6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0842436 — a six-check JSON result.