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 0x54b4610d181c62970538226babe07a25f53f3861c548c9c98e58e3447370be09. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6987bf20-d230-48df-b53d-be74529cd50d.json and https://artists.proofprofile.net/proofs/artist/6987bf20-d230-48df-b53d-be74529cd50d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Raff: Works for Choir, Piano & Orchestra
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 0x97e8a8edd00bc93f7d6f0bb9c35bdd77f08b3dbd73d0bbbea64c35f27c6f681a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SEWSJ1000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce90ef99df79276b0a152b31c99322c7de7fe163781485c22eaac1b0fb4897f. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SEWSJ1000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebed1c8f879488fb98ae178ac9c1acb30f84f817ad473619f63158daff6b80bc. 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/SEWSJ1000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fc1356f29be8715d7f1a989cfbc9b1b2440564d5276bc1d176379f104d4237. 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/SEWSJ1000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c2a89dd04c8066bde5e598f5e05359d33107ca7bfbfaa23ae29ebc33b97540. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/SEWSJ1000311.
Joachin Joachim Raff: Suite for Piano and Orchestra, Op. 200 - Overtures & Preludes
Sara, med allt sitt väsen - Musiken från filmen
Ante Lucem (For Symphony Orchestra And Jazz Quintet)
Anna-Lena Laurin: Anders Bergcrantz Plays the Painter by Anna-Lena Laurin
Norman, Rangstrom & Wiklund: Pieces for Piano & Orchestra
Atterberg: Cello Concerto / Brahms: String Sextet No. 2 (Arr. for String Orchestra)
Cello Concerto in C Minor, Op. 21: I. Andante cantabile - Allegro -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dce5340aacea471d9dadc6f9d7bbda8363af8165d1011511d7012dcf5ca7e49. 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/SEAEP0604010.
Cello Concerto in C Minor, Op. 21: II. Adagio -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9adad3281f4be411ac663f77fd67e6ab8e96d5744d757282a4ca36fc7d3b81. 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/SEAEP0604020.
Cello Concerto in C Minor, Op. 21: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18330f09fb2c95a9fba6e54780edc663168e01860c3422423162dc7119f7a83d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEAEP0604030.
Svenka Folkvisor och Folkdanser: III. Poco lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9666449876b2d6bca12ae363c8c9cf9c54762bdc3df17f103ee6c0ae88e33b1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/SEWSJ1650368.
Bellmansmelodier for Orkester: II. Hor Klockorna med angsligt dan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817c5131318bdddac436ac841b1750c6cef1aeb890a52643e2df66b7f4ceca07. 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/SEWSJ1650376.
Bellmansmelodier for Orkester: IV. Fjaril vingad syns pa Haga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1b948a100f4fbcf88b81eacbe928d13a597c1ef81d9a7def4c6571e83c926. 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/SEWSJ1650378.
Bellmansmelodier for Orkester: V. Se menigheten, hor pa trumpeten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56be049d5711fdf5082f2d4cd06b77bf1b61ca5c9d5b2cf90c476467f952c3bd. 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/SEWSJ1650379.
Symphony in D Minor, Op. 17: III. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473cf6a348f8cea0f39201383f3989180ca50cac4b82b291274a072c6a9074b. 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/SEWSJ1650517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd86f83a4aff2c5d32738a2b858d158b567425c8f95d04e8958ec5438e86b3e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA1900801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0008cfa2a08ed653d29476a79dbf3f5e0ee5ae7850b6ee1a4c23b426dd364e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA1900802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf39df3c572c9b6b7d7556cfc67371c0c6ec0e3196ded930351ae25d65618926. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA1900803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19029e9519c6fbe6a283adaed4072abb1ad727810fad5b11a30451e3c441c9f. 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/GBBDZ1830695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfdb69e1c0d2ad2f978128ccc70be9d5c13d3a81fabfa78d4dbe0e1d9a97b60. 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/SEXTQ2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd0f9a49fd1a7ed9641fdf52c98696b3ab79f8efd98676e0c914a202b8e0c7b. 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/SEXTQ2000207.