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 0x6ee123d54401558636109b836b52ad6fedfc9be9e36e8fde282ad7f014984b1b. 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/f0358c45-aa1d-4c88-9ea8-2a1590d5d9cf.json and https://artists.proofprofile.net/proofs/artist/f0358c45-aa1d-4c88-9ea8-2a1590d5d9cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Obra para guitarra de Antonio Chover Salom (Selección)
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 0x2f102645bade371d6abbf6ac12aa459ffbc592ab95c95cce907492b022c43a8d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P41750506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf2fa6d6297d6fd3a0a2b6861ae401e09c59489dbbe25f3f7f398af1e4ddb6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QM6P41750507.
Homenaje a Escocia (Variaciones sobre un tema escocés)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dfdfcbe5c6dd24c83185cf252655a35d573f50e0511610dc3fdbdae7b00ebb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QM6P41750508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c31e5f2cab1a43805eaa859f458bf3f153688d104aa7f25a069e8d3a3086aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P41750509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea67729937a7839ac9bffd1df1812d3ed8ae257de7a9eb63c29f2bbebf9d614f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6P41750510.
II Mensaje hacia las estrellas (de Preludios cósmicos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6271027f879385a9530c00ccf4c18345a4c4e7f09a6870e79aaf960875e5444a. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QM6P41750511.
III En el vacío intersideral (de Preludios cósmicos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1358cc200d43be38ee62e1491d36a9f91bac350dfcc257e28fcc08ea8969d8ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P41750512.
IV Cántico a la infinidad (de Preludios cósmicos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b6eff5a051df3e8fa9b06ec0047773d8ae20366040218e8a7f40519e2cea29. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P41750513.
I Tema de juventud (de Suite de Valencia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083186b614d7d79acbecce752961b310e716373c9e88a7c56581007561c70c5c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM6P41750514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f15dc45111805a24162bf049cac56f8f084e3a6ebe2d61ba96aaf6f70872a8b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM6P41750515.
III Danza en la noche (de Suite de Valencia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd95b478758269f4cb8f366f861111cffc9f68d090ec59762f34fb8dcc8bae33. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM6P41750516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0ddab8d3c72e8a6f78fc8061e267b110b7732cc9d3e74e7dcc6fb4cd8f530e. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P41750517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5320fdc12b8c7e99e22c41581da8f94326f241cd3694c1a59574ab23d80c6492. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P41750518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd7f6c4f8d73a8dedd77a511d5721a25c4f2576e5f64b7add6def469c7fc517. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6P41750519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4db1939dec6277815baef26c45ec8a03f8567be68fda6d4f36bbcdc01e9120. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6P41750520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36d955921fd80c60a49943a11845bff46b0e10f4a4930ef5556ab1e14f80fe. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QM6P41750521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d9345921597443e90c3a9cfbe6ba817aa9ab05a479ca76dadb473d5bf37975. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6P41750522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bf4de45e07166175dde70430481a5b42fc605c37472e558ddbdc4869ca7bbd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6P41750523.