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 0xbd2fb0f29f897cded36e4e7358833ae3b028c9bde800df1afffc5b34919125e6. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42fc812b-eae3-4312-ad8b-a514918ac489.json and https://artists.proofprofile.net/proofs/artist/42fc812b-eae3-4312-ad8b-a514918ac489.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Dialogue - Charles Mouton Lute Suites
Piccinini: Intavolatura di Liuto, et di Chitarrone, Book 2
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 0x0f92fca18e61c0e49617595768efcea2bb2a352b24569400d8e4484ba30b27fe. 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/USANA1700201.
Renaissance Fantasias: 16th Century Lute Music across Europe
Musiche a voce sola e intavolature di liuto e tiorba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8516d3e0587cd661c2d45f55c585dfc4375b5ea6f3d8f8641ebee5966686bc7. 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/DEU241111729.
Musique pour le Roy Soleil, Robert de Visee, Works for Theorbo
Futuro antico VIII: Trentino (Musica alla corte dei Principi Vescovi, dai codici trentini alla musica di tradizione orale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c11ecba3d13a55922bcf431d01b35f83d5a830be79cdfca0f0beb53083386b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITP951400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca471ff0b4de92ac52074048f45c8af6571d47bd3f5a7b8b41e1839e7f75b7fb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITP951400027.
Baroque Songs (Milan Baroque Music Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739c0fa7d803170f16c83c09ad73cc60b3ee4a538a6406b5d91f27d856ab6fd. 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/QZFYW1903652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0292096c29a992b5971ade77d596be6f848b79b63d103135eca9423d7b9590. 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/QZFYW1903654.
Les sentiments: French Baroque Masterworks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7350fc700db827716167f9406df5bd696cf85b2ee814bd59b19386c49b48d463. 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/ITLF52416107.
Musique pour le Roy Soleil (Works for theorbo) [Robert de Visée]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2b5648c50f475dfd47d784191e86b1d112fbcd6c22c0475c9bc8985b7d5c14. 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/TCAJH2593241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8e52c47df36a2ba10a5aa9c529d8cea8292c80e9c32d5b96b413f6d0b52e7e. 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/TCAJH2593307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003be266f2444466fb1c18203f9d61aa47c8eb7c904f0209c9f2d7b10313a8ee. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAJH2593310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c820def47c189b4fe7c410cb2ecc6d2e074dc36bf32488ad050827cd5ef903. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCAJH2593320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171154a891f64df6e809e124f39ca126acd162445fdfa04c803284ce34c40b65. 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/TCAJH2593325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88fff6f16913eade9e18d81cd868975eac1ae2e82baabed4e2160c1240c03a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAJH2593333.
Ouverture de la Grotte de Versailles (J. B. Lully)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8856c895d43e177616078a1519347fb5ee912091f1bb39fcef402096378825. 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/TCAJH2593347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9126909e771684ceb4679fc966a48895308a1e481aaec156ed20570f43f824bf. 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/TCAJH2593352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc401fb690301632036ca0e0a913faca04de998307e5aea7934f8f640823a4945. 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/TCAJH2593434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a2b6e88a99b539b206bba34353a482d12808a9e28a515569a00f7c4cf934c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAJH2593441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5208b8b4b7a297e317e2f4724a0bfa581d1370731975ca008fbf2ccf21653c97. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TCAJH2593446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd093f5fd924076cb92063d4cea5ca51e7f52106f6ab52845899f5c28024e603. 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/TCAJH2593450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dc51ae4f6b63fc133414200912b92460628af80791e2b2cce3abca63de16fa. 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/TCAJH2593454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda1d702777db7179b1ab23b05c0d23b53f167942e8321424d3b06bcf83043cb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAJH2593480.
Le Dialogue (Lute suites) [Charles Mouton]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578cfc3de2adcf5bf4fa662e67a681d6cfc8a871699ccdffb5d884184d8a20de. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAJH2592306.
Le Dialogue des graces sur Iris allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35de23b78dae1425a07474a41d334baec42b3bd11555024dabc6d5487a5dce9c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAJH2592317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe325799d019972b212bb78bd6a8f48153d8acf2f3bd0d29b92a73ce7ce6c6ca1. 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/TCAJH2592336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09583e8629f5321545ebaf61ca98b405a70389d583fdad6151debf15f13186e5. 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/TCAJH2592340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83689a3530770579ef97439d39fdd9cacdeea1ee22c8a23398d9aa472b4f270. 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/TCAJH2592344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef352d6f080b0efca7839845cfaba5f6b0e88b3dc8c09b4bb2575df2402e711. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAJH2592350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a05f1cf15e44d38f4c6e93b79905f4e44affd6a51d862a28755776b594cc9e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAJI2592354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe566ddb11cf9a838b04c89c03675d4fbd0831268cb46258be1901fa18c20ca. 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/TCAJH2592359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1c5732621c30324be749214c3be8d77e0d3023a73ba4fdd0ca5f161dd10842. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCAJH2592374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed97e2d4aaf9d888944b2fac04ae83e92a0776736c7de2e40c60a04fe63fa8f. 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/TCAJH2592380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1be0e6a822475a3da924d0f4451a9cad61e74a2c992baab572301c718ba778. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAJH2592409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c62db32b8f1ec0d6f96bbbbfdcc9b5ba346f1a99630907b1f8950ae5df0353. 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/TCAJH2592417.