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 0x8797e0a9b7b3add58828852f4ba787bc8d4a8854118efe5b1607a3a991691f7e. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc84f94d-ed72-45e1-9a62-bcd6843f9cb4.json and https://artists.proofprofile.net/proofs/artist/dc84f94d-ed72-45e1-9a62-bcd6843f9cb4.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 0x1cee374887cccf7b4203e2fe7c0fdc98cea57bb274c1f2419f01d17932cc7769. 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/QM6MZ1842728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556e14021fb8aa23da501dd25d25b2728e47380693957320663679c9aabf7ac4. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM6MZ1842729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc41f2075b3d7411d82d7f940fdc215459caf87a73cdd6f1a533b231b0c9ea6. 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/QM6MZ1842730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d929cc2c75f0cb870a01e9a1d8d712da07e57c85bb43d5980c79188d7eb8bc. 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/QM6MZ1842733.
Prelude from Partita #3 for Solo Violin in E Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf049eccae5db9504696db744d029ebbe15ee27e54aaf0903adb764dbadbb2f15. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QM6MZ1842726.
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 0xe2b61562f259dfd4c41e6367b5d8466f2b416430511a32ca2ddb99086a02de62. 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/QM6MZ1842731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df99e7392abd8182fa7f61fc8f0fa9b97aa544ad138915e78d7cbc3c7991896. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TW1524437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1859d54c22ac41fb13458ed5f1b3cc190a361702a43796e884d21429ecc9ac. 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/QM4TW1524441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eef4f0369eed700b4f5b6f44574c000233911f0e091add19bfa0853734a156. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QM4TW1524449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e52567eacfe430d6950383653950e69b0f2899fe6dd1f795db22b61fc2654. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TW1524453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dae6b63b91a06fe32cb6cdc948ad95618ea87201b92de73f478ac9e50c55fd. 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/QM4TW1524455.
Canon in Augmentation and Contrary Motion BWV 1080
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd6255687aa1d489f4aabc3c2c2f80af40cfee4020c7cd862474a00ae876029. 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/QM4TW1524457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794cdc325129fbcc3c276a93e13d86375c318d341d0fd46f0fe4852b12931075. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4TW1524438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8f6b2f9659226c06e6a4ce8b727ef2d9449dbc6ce9b2a7972cc689060215b9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM4TW1524439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff1cb12339f2c799936210722ea1bc2f71e709fa174ed1d96557a444186da2d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM4TW1524440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725bc1ab93f039e7f1a2cb2a3ea123f4087b6288cdddadd5c0dc57620925db26. 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/QM4TW1524442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e5e0f7381d9ed12cf5cc55fd56d1d27e1879471cc581142770a8b25e48ffc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4TW1524443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192fa6dfe83d74f98edb72ba5cf1cdf6796cb91eb76b029ff293a811fa998bf9. 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/QM4TW1524444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcd9e7525c2f9a9fd8a715a2efb764fd0321dc40ebb3c8f32f2eb6983691b2c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM4TW1524445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626ea4731a927b980d50e6a1aadd5ffe0ca75705f185e10842e5ff1ecc8ef6a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW1524446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3bfa7419db7b5cfa3a293d16d22b136a3dfc11d02548653efa715104c7c880. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QM4TW1524447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e060f0dbd4dd295f56ef547c2d69bdb0b7eb03c1fda37e45c168b50deb69a79. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM4TW1524448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38826cd88d008fceb96879402eb852edad1b7fda6be18b871c554ef2c293c088. 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/QM4TW1524450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c02b4f41804911fc78fc140f85eaaed338ef39396e23cd5a75f74fc7ba7128a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW1524451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a8c2dafd9e9fc976845578fbb798a5e9319cf0ca9397d96c745a20c19ecd9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM4TW1524452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a4ff492581278c29bad758479861e343f99bdfa4bcf7a43ae6c0f63daf67e1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM4TW1524454.
Canon at the Twelfth in Counterpoint at the Fifth BWV 1080
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e960aa356b5b6a5782d15d3afdec8218e45d6111bfddd60c76d37c12cf8f679. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QM4TW1524456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34a233fc29674cb2c8f2dd9a27c2ea3222407ce6f74cc1c721d75ffa455d94. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM4TW1524458.
Hesse: Music for Mandolin and Guitar - World Premier Recording (Digitally Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bbf88a3b9ea9d97d74b7c3b9000107021da2e8944d0e80be52db26537b7b31. 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/QMBZ91377820.
Violin Partita II in D Minor, BWV 1004: I. Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e57583dc8a95043117c5e9fa910384adf95fcd923d70a0da37667ce975a222a. 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/QMBZ91377830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8685910d595d7d2c6033b05dc7aa5150930e9556e78d4593ed5ea55059e9c8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ91377836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd426a336f2de49c08de1337da0d23e1013efa483df1e42fdfa97f744e432896. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMBZ91377825.
Bach: Cello Suite I in G Major, BWV 1007 - Prelude (SongAid)
Ein Engel in der Nacht: Eine musikalische Erzählung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43840af40b4a421f8d5425e761d4244ee68be693bcadbc5e098fae04ee9d410. 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/QM6N22062084.
Angel Heart: Tiefer und Tiefer (Arr. L.P. Woolf for Cello Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efb41f305f053987f3967a700362a4b8714d22d03204e764c0b28b1531b956a. 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/NLE421801026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb420c5b13e304f294dd1c5dd56f7c018898d72315e45496c1a1e1124a21e0264. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USEEC0612263.