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 0x8f68c873598df4999389a196f43618b07ceece12d8b9dd08af83c7ea06cedef4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8307f73e-2670-4e57-b15a-e239555ede2e.json and https://artists.proofprofile.net/proofs/artist/8307f73e-2670-4e57-b15a-e239555ede2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem in D Minor, Op. 48: No. 6, Libera Me
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 0x3a3365d92e5e98cf158006b1243c1ad37fa529758342ef99fc1e116a63f017cc. 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/QMEU31717760.
Requiem in D Minor, Op. 48: No. 2, Offertoire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff11a0c521100cd6d69360f53c9ad76749b5d083c6815d5d01590a7d68a78b. 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/QMEU31717758.
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 0x941b15eb3b5887f874258846f040aba942768bdd254e7026f6ec4fcd948ffaac. 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/DKKQ30800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fff59d8ded500ce169b89d77e7d798ebd7bfdd4b67836b3d3a65139932212. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKKQ30800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5313ab3699de1c1082c3fa16a7a6675006e0e6a81bc9cbce0d425056bcca9dcb. 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/DKKQ30800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d426915277a11a7e79e121efd1313830deca3877c386a8e2a33f6c0c096e1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKKQ30800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dc7ca56ffe93581cd95e9cc1053611b955b672611cec5ab85ab694943bea13. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKKQ30800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb013c83535635e6a540403d6911d8751175bdb326105f983d414cfca1b2badb6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKKQ30800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566693ed02f1a532180fe7d75d0a76fcca82a42ac9ea09ff237f9c47025fc1f3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKKQ30800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a529432053307889570548f069208c5f4f1bd3d62a4c08c19c013db51886b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKKQ30800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ce0e951fd4eff10cfc6da1f805b28a04909c5718ce0a7928239104475339b. 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/DKKQ30800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325157a95e6087cfd5ccda28ea6d6edd7039a88aa2f52b8f8bf6e1d8bb62b40. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DKKQ30800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31aa1d0688ded0fb079e6c6cd226763194efe8e807e682ac1c7519874531a4a5. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKKQ30800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cfa5ec81b90db77156c15b7eec3e16a0839daa3b35419718a9b68d51b92438. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKPM71000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cf3100e761257898eca5de54180dbff954a4e462e23270ab453b669d6cf46a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DKPM71000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677a57cc1638760e09c09ad531b3d6d9b7411d2c69ef1a4e5729c48dbc41930c. 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/DKPM71000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb3a850e9403d414e2e2ac25379e7f0e13f0bcd73d3bc2fdee69c5d9651b634. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DKPM71000306.