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 0x6f46f82869331aefd17c0bb009be5345bdf9a9fe65ba404c4addb0a6df6ea4f1. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb32994b-1329-48cb-bc2c-93c840874af9.json and https://artists.proofprofile.net/proofs/artist/bb32994b-1329-48cb-bc2c-93c840874af9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Albumblatt V.S., Op. 6 (Dedicated to Valentin Silvestrov)
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 0x48bf6c982c864214154c044e053b3688f2168761f7a3bc9c41c653dcc56ae1d6. 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/NLY332301327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7105c3b77d7f8403618f1ac8b8edebce03c7a8da65ca4b666ba02aff2b267. 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/NLY332301328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66faf89d2054dcd3c268ec721b75e54f9e57cee5cc1014d349d3d1909398a026. 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/NLY332301329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c4e33d02d287f515226cff130a0d562d2f003be16a69c6bc03e9a7b860de7. 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/NLY332301330.
3 Pieces, Op. 102 (Dedicated to Laura Reinila): I. Elegy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049a8d99f1d8b04c340be6412743c7443b37ea48fab480083c5ac5ec036f2417. 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/NLY332301333.
5 Pieces, Op. 143 (Dedicated to Laura Reinila): I. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512269fdfd32260ed98e12e15bc86940769e8ce46fd0be5d09912efe88051106. 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/NLY332301336.
2 Pastorals, Op. 114 (Dedicated to A. Levkovich): II. Con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af1caed2ce39c0dd555c5a8400e605e333ea29992d8797b90a6859a903d3512. 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/NLY332301342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9b2bd2cfac46081cb63d91bd59076e32195e8f329a9e8b028e1753a622a42. 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/NLY332301343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161b11a0b8573040df560cb8f3d0709f96409e7f7d05293d1a2589e5af511fec. 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/NLY332301344.
2 Pastorals, Op. 316 (Dedicated to Tomasz Kamieniak): I. Con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bee9ef0c6d7a6a5e4fbe85b2de2b1762ec96fdc1ac43316f026dd336abf14a. 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/NLY332301351.
2 Serenades, Op. 142 (Dedicated to Jenny Lin): I. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe245e5e3fb897ff5d15e0aa18e64f30f1abacb60d8dbf99f6676d67ca857f9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLY332301331.
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
2 Serenades, Op. 142 (Dedicated to Jenny Lin): II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e0a006c3c74a80a6787fec3be98eb172bca7fa458b7b49f9d7ce026899fd8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLY332301332.
3 Pieces, Op. 102 (Dedicated to Laura Reinila): II. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a511a41df377491be69298fc0d1d4888671529125d76e22d7be693108b07eaf. 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/NLY332301334.
3 Pieces, Op. 102 (Dedicated to Laura Reinila): III. Elegy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6102e49830ed6bff111bea616c9bb38dc94e03995b5ea2f7b8b9d89a2b45efd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NLY332301335.
5 Pieces, Op. 143 (Dedicated to Laura Reinila): II. Pastoral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5104e4e70876b509ee9cc2adfd42ceefa87e851821d237a2129e5f8325684f9. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NLY332301337.
5 Pieces, Op. 143 (Dedicated to Laura Reinila): III. Tango
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087403bb467fbe0d6b8687dfa2e97d998c3a71f3dc2395671513bd256f8df3a5. 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/NLY332301338.
5 Pieces, Op. 143 (Dedicated to Laura Reinila): IV. Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c94d29a9203656c4e9e6263fd6f460a5b7257a3e402eb3fb31e099fe969c89. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLY332301339.
5 Pieces, Op. 143 (Dedicated to Laura Reinila): V. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d215d810653f119a85f209a8441b724e91d5c476f08e5f31c2bf6f3206a6df8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLY332301340.
2 Pastorals, Op. 114 (Dedicated to A. Levkovich): I. Con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c20c3c720471287dc23e2e65cbb77a1e574c55b036ae17b87fc88a19e2dc359. 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/NLY332301341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72955cea148e9db824c1f0ab9ea8c53a626cee7308baf1a72c13cf07b6ce39a. 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/NLY332301345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5dc17a4b17245c2184047ed24101c4b3fe9d0d3d53308ecc8231eb367ecaa8. 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/NLY332301346.
2 Pieces, Op. 293 (Dedicated to Tomasz Kamieniak): I. Pastoral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea8122087aad2ec2f557316fc97edba84a8dcd9bb222f25d80021062ee2c43. 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/NLY332301347.
2 Pieces, Op. 293 (Dedicated to Tomasz Kamieniak): II. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01107395cac01eef6e357b1d3165a08d9fc88d7c31585ec0d22faa5170c45bc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLY332301348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0860dd3e08a411ec7b7a2cd13295dc5be90737e4aadf5bf5b19047f77c79e73. 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/NLY332301349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302949e170355c3072603ff455273c326a1a5f39e077629197c468902b49960. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLY332301350.
2 Pastorals, Op. 316 (Dedicated to Tomasz Kamieniak): II. Con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2542a62145c7428cc3b4d49bb25b6063d976b95ad554fbdb78bb8eb52426c7f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLY332301352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1050b3639d41eec590716f41d800225d03b50e53dbb3a6c389ff94de753cb9. 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/NLY332301353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c89ee03239accaf50bb743845205ccf56f53a6a106d0c5c18e1e3247b0d13f9. 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/NLY332301354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e66ce0454a7f6c835a4420670b7adaaae79186b0ab0a31254b569e10bfebc7a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLY332301355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890ea85ed313156035716766a7a239fad6c7ac62abdf8d6b5f1ef89175ebfc2e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLY332301787.
Tomasz Kamieniak - Buch der Geheimnisse, Sonate (World Premiere Recording)
Tomasz kamieniak - am rande des tages (World premiere recording)
Józef Wieniawski: Piano Works (World Premiere Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dcaba68e7206936cbe07ff14c9e688c85834d02b09aea0054744e8885c9ac9. 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/NLY331902873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72202876824983fe445e0be44465501c2809c12f8e23046a02889f784e7d49f. 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/NLY331902885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59716bcdb36c20180c196a63dbdeeb33718a295751ba2194280dc426cfc4b4d. 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/NLY331902872.