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 0x024e323bf966980800f9043e97834f2932ed8659df9c4b83e20ee409c3ddf345. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1d8e34-5c19-4c24-bf7a-2c9994a3f6e4.json and https://artists.proofprofile.net/proofs/artist/8f1d8e34-5c19-4c24-bf7a-2c9994a3f6e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
W.A. Mozart: Reincarnated (Lion Music Presents)
The Magic Flute, Opera, K. 620: Ach, Ich fühl's, Es ist verschwunden
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 0x2b1c499001e40dbd624d5db3d32a66f7f35fe572e314487efd4935afb72fb7f5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USDY41531514.
Eine Kleine Nachtmusik, K. 525, 1st Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093021139c047d155bc1934b15ba7412cabd913ccd4f98e758e11da247199de2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USDY41531516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f62decdbb6a5f7f0b12b240358a500d0dfb54a9838768159bda731b26fdfb4d. 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/USDY41531518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa432240e276ecf0849665dd5641c5c61adc19d4af57f66599fce573f1c94387. 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/USDY41531519.
Symphony No. 25 in G Minor, K. 183: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddfd86e2e995787394b1649bbd3b06d4d1250747ac63e61f04693dc772df5ed. 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/USDY41531522.
Interpretations: Johann Sebastian Bach (Lion Music Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d27973c5476b53cbd3b078fd0e6048bf6e83b8c8b0f0b02dadb25a52bcc77a. 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/USCGH1508714.
Brandenburg Concerto No. 4 G Major (Andante, BWV 1049)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f754f96c07b8862ac086adc0f15546fd4766de15f43eedddb2f37ea1ecf08fb. 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/USCGH1508715.
Badinerie 2 (From Orchestral Suite No. 2 in B Minor, BWV 1067)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd268cb9e8d1fa407407dd50b14dc84b48ec4dc056215f73c7ba0abf1c1e30ccb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGH1508717.
Well-Tempered Clavier (From Book I No. 2 in C Minor, BWV 847)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9cb8a6e9d5d3267bf328e74a349ebdc92e4b7562761e382bdfe683e1feb5d5. 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/USCGH1508719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef2263b818a4270f5f45883cbd903c685c44e77a4f4e59bf0f10beb4d8c92b1. 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/USCGH1508721.
Marcello (Oboe Concerto in D Minor, Adagio, BWV 974)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa390cbe3f804e10a15661ea84c46fe1d205d6ff3b86cbb9063a48c041ef1f2ef. 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/USCGH1508722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b2175a1df535e06fc92b3ba4d8a4f2389fb8df7ba2871169165cb401fc0f35. 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/USCGH1508723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93622d8664331192439d7820f3b85f1681b0de1f4c8be65a97748d702f31a11. 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/USHM92446254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f757728ea308fcf95093da1a4ba0d5238d6b7af94af11411602f2e1a95c2142. 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/USHM92446255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb2a5921dcd0c235e5b08786eddeaadb1a779ed24a70c420880454bd75c05c9. 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/USHM92446256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb61c8476e84f6dbc64dc5f55f0f57f0d11d415cd536f5e824ece6b7860ac62e. 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/USHM92446257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba58fdb0516908228e0dd2358f76939236c93da0cb0f015b2a84b120d332a629. 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/USHM92446258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c4f5f3be6f1ad51897b2a4fcb477ca200b26b7f06003e42cf98eef74154c6c. 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/USHM92446259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533d541005250d2267b9e0d80a4f3c46f4593140df80af93382164062b5cad3a. 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/USHM92446260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17395d45b531f21bdc91c5497dea2a4c13508cde4af7903cacfcdf565b44a23b. 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/USHM92446261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc880bf5729055c3c07346f613b60266e329d4c4c6de78cbfa9be43da63a0318d. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USHM92446262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7f93602ae1f7c5a3648afa89bdf426b005245e6831ae817b3e14f74b22dbb8. 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/USHM92446263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f9c815074143e7a0ed3a6c9a6017cdeab3921fba01aae018351ecfbbcf0eda. 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/USHM92446264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cc81fc25ea7779988aefb433b2638ff93e137148d1c1d4560a8216d8a2c064. 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/USHM92446265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93622d8664331192439d7820f3b85f1681b0de1f4c8be65a97748d702f31a11. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM92446254.
L.V. Beethoven: Ode to Perfection (Lion Music Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e5c2bba67673fb6cc218cbfc3fc7572e7eca823cc1dc4da8485dffad6b456c. 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/USCGH1703705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4872064a68a01fff380dcd747d3a200ab362100190fd150f2b10c643fec534. 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/USCGH1703712.
G.F. Handel: Baroque Passion (Lion Music Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49332a5a90672286f42a43a71ff671fcc91342fb3b84dfeb5f33bea2c8bf91e. 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/USL4Q1707248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e640f32ae14a832ad6d64a7f0c2f2d01ab2c60bd59f846b880a8848e9dca94. 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/USL4Q1707254.
Need to Scream - Best of Screamo & Metalcore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea52700c0bd3cc42c7b9419a704d09d2e2043ba1d5b38affbe3e79f16e1108. 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/DEAR41528918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d77d47c5402d1188a066043c937722faaf4f01c0613930ef854cf434e0f0477. 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/DEAR41217917.
Joseph Haydn - Reworks (Lion Music Presents)
String Quartet in D Major, Op. 33, No. 6: II. Andante (Arr. in C Minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f20848665976056c2775859b4b56062d6295a99c7a58c3126ddcc544d1a28. 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/USCGH1924368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711447ec2efaec57503e5e5cbbca07515a6ed57ce5c5b8232c89b0107d9c1396. 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/TCAJE2525361.