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 0xff3d011d224d0235d8a1da0676a80f773652024bb2c2c95cc92129b18a26e05e. 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/397714ca-aa63-4db2-be23-3b473fe607ad.json and https://artists.proofprofile.net/proofs/artist/397714ca-aa63-4db2-be23-3b473fe607ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
My Favourite Things... (A Guitar Recital)
Fernando Sor and Mauro Giuliani: 24 Studies
Metodo, Op. 27: Poco allegretto in F Major
Ferdinando Carulli: 20 Studi (Little masterworks for guitar Vol. II)
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 0x333fea8655997f635194af76cd756c8e911e0ebe616359866db30a8418624541. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITTA12302536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa72f7fb9f0d4b4a0fadfd55e0fddcda878ae23568faf6baa7af8154dc963e6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITTA12302537.
Metodo, Op. 27: Rondò Poco allegretto in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b420681b1f520aca97e0bf880aea103e689a016725db4b9a9dae401491b13. 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/ITTA12302538.
Metodo, Op. 27: Andante con poco moto in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac8f04e992d7c192454040ffe1398980aca8fbfe6ea3dc63abbdaebd2b35f51. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITTA12302541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd02fc355440073c511a6e96898cf206e02f93aa93ca691d3f53d475e2763c. 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/ITTA12302542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95167958f7abc2f76a38cc0d000d9b0e65ecbd564265c384bbae8d7aac97a829. 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/ITTA12302544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbeefde3e176d480867b715a1415994b739a0f1d9d1fd7e3ecb6c03ad5728f83. 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/ITTA12302545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0ce718b05dd3bfcae4f935cf4ada68e313a859a336d6b21349b92cc88623f8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITTA12302533.
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
Metodo, Op. 27: Esercizio per imparare bene a legger le note coi diesis ed i bemolli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06608834c91ab0837cb4adc6efcd637b5b258abed49a5926a4db076a611496c5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITTA12302534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1479a41bcb81c79f303fda30a0ba31e6f26a227dfc9b2d0328af19ed46dd4ab8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ITTA12302535.
Metodo, Op. 27: Rondò Poco allegretto in A Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebb6a74dc56c610ef5183ce9eab0e69c206ec87d427b7b52228c271e4d1481f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ITTA12302539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1496ed6cd776f722ce8eb788db0f23e4b3dcb16c2a33f0688f9b38ad8b935b. 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/ITTA12302540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d468759242ed0e380a430ba0a41e801f19cbc85f9c4548de6b6a5b621c70b5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ITTA12302547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272e04e14aee9ce92c23c229e4ac496bf8c05262a39c6eb2aa363cf7d2b55315. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITTA12302548.