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 0xd01a8ef2190a835df68169721a80595640db466a119ec8a8d4a21883ae24ad47. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce24d818-194a-492b-b508-c3428d65517e.json and https://artists.proofprofile.net/proofs/artist/ce24d818-194a-492b-b508-c3428d65517e.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 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 0xaed3fbc1ce1501fd26dbabe0c0bd4cafb28648cd3e4b93cc50437eda68815a8c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA622302951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdeb338068b345af9b146492ba2b84c01dba4a825446be93d10597b8bfc122e. 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/DEA622302950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3fbc1ce1501fd26dbabe0c0bd4cafb28648cd3e4b93cc50437eda68815a8c. 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/DEA622302951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363bca687f7837fe3f3bb27e0ec2a2c13c668e6b2a4f97976f9f8c9e238309b5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA622302952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd0244f0b3c38c65690e8ffeec7108d8dcb69948631fb1f134da6c8eae4fca2. 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/DEA622302953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2286b9d4d59acbd6cdec786c5c7090149357dbd7031876fa0c35d3761c75a91. 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/DEA622302954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6050856e816b38f01f02ebfb73f21f4ac948ab8397329b73c9fdb96cf5bb1e2. 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/DEA622302955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe313d997187e557698f3a807d2335b5bdb98e14439d89124dde48afd7c81c992. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEE862000686.
Arietta - Based on Grieg's Lyrical Pieces, Op. 12
Silence Is Something You Can Actually Hear
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6972b2bbf0ecb1704e0d6e8bf8f2da10aa156a08b9249ac676e9faacd59e7c5d. 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/DES382310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572e68615b6c96141a353066d29bff19f4ecd0eefa75f168e053b8f9aa85cbb4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382310002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0564720576f1f940558c7e27afde423e6a620bf15092865f78e32a2f2a8cdf1. 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/DES382310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69c11abc00898e839314bac5da9c4f73c24486e4726e8939c11d2be960711a8. 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/DES382310004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e348d3fb221062c54a8146f9c7a1772ad8d530cbdf9754707d37bed387e0c4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DES382310005.
Enjoy the Silence - Piano and String Quartet Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4051ef4f2ca2453af350c36064f908e3ef7d4c7d6bc3e167473e53473469c24. 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/DES382310006.
Nich Yaka Misyachna - Ukrainian Folksong
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193cb216e53618d7d71a5f742af3b56d606c2200791d06d3e5639ab8d51fd7b2. 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/DES382310007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c88135690658c591bd0bd7131b50c5592a9cfdda2d0df0c4874328ad3687c5f. 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/DES382310008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b76fd7b65b95620a80dbe1da894674932a2ee42fee47ffbc5a55a482164ed14. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DES382310009.