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 0xf60db741be188309bb282e0617349497eac537323b2952dfc2d6677726e19126. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4e2ccdb-2159-4d9a-a250-4b89a0a1888d.json and https://artists.proofprofile.net/proofs/artist/e4e2ccdb-2159-4d9a-a250-4b89a0a1888d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x3fdf41312cd128f236b75de0fb796be9c5cb1bfeb98b2b5673a9cd6c401c60a4. 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/BEE020995801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc118515cba635626436b1c3afd037d75c6d42979af2a9c8faf7ddf2644447b2e. 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/BEE020995807.
Prelude, Fugue and Allegro in E Flat Major, BWV 998 : Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7da90ae306e0086289e29b85b0a7eab450af81ff538b684b5678abeb286f08. 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/BEE020995818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39204ad2cadab2c63322999e1e61954f6537d245a011ad11801234ba698a178. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/BEE020995802.
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
Partita in C Minor, BWV 997 : Gigue, double
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46c18325a3324da172c0ccf28898094e3455078a61f230a1a2d9f455fd2939c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BEE020995804.
L'orfeo intavolato: V. Sinfonia e solo, "Possente spirto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376bbf79cd3ed6d82c99d5c9f0b29d12cf9d2ba46a8f1c5c358d38bc1b3fcdc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BEE020995813.
Prelude, Fugue and Allegro in E Flat Major, BWV 998 : Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eb7ef2ed39bc07556096799ded01728df9ed2a944584a44e2319cf913579c9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BEE020995819.
Prelude, Fugue and Allegro in E Flat Major, BWV 998 : Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53db1a4e98a00a38e75688d0cb4494f7b5b5df0c31126d8e56b3f0af64239a03. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/BEE020995820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96c180d7bc2c49d456ec118b14e3b3fd475fe43c83c61829b4225f0cdb11014. 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/DECD61313002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778a872fd4c6632c42196cdf09ecacc7c5273e9173a8b54cc06e4fd6df90dfe. 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/DECD61313004.
Obras de Musica: Diferencias sobre la Pavana Italiana (Version for Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b536d0599440c4c7a504ab05b28283c2fa546943e356c06441f29032a6c156. 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/DECD61313010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87475b4ff82bb47a8d16dac453d9b1c26f32a14d226ea78d04961a1b00c9da81. 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/DECD61313011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc4255aae96ee764f56cb850cd7aecdc0fdafbe011853e77348dd03f4f74496. 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/DECD61313017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e5e649ecd5db8399c09b990bf6d1f9470b1936f6dbc8382cc8f27326f85d04. 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/DECD61313018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7c171d8ff4c276f6afd90172b13c71e9549bd32f1db63d77fe2edc45b119f6. 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/DECD61313020.
L'arpa Barberini: Music for Harp & Soprano in Early Baroque Rome