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 0x7115eb615c9d28e549ce4499b112da123afa77580c406a3b14e67d0f3394643b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b217770d-b6d3-4270-a58f-cebbfdf63739.json and https://artists.proofprofile.net/proofs/artist/b217770d-b6d3-4270-a58f-cebbfdf63739.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 0xb6581168bc77cb1a6d3d1af621bd06d3e8c0b273e09331b0679f716fbe1f2a87. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE421404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3cd7535bce509d9758de70517472af93a77fd7d38c02b3442c55dd07cff8b7. 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/NLE421404902.
Sieben Magnificat Antiphonen: I. O Weisheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf34bbe064844de117ed276470f7d7a03015f640d84e6449a4fb3d699c93146. 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/NLE421404903.
Sieben Magnificat Antiphonen: II. O Adonai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4df6e0401aab2f81173ad40052821e23fff871b194528c7e604dc963bf31cc. 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/NLE421404904.
Sieben Magnificat Antiphonen: IV. O Schlüssel Davids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d5993f0a8ef8194e34f8b50d62e2fd2f61ba87b4fed7ff7c55e19ec813942f. 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/NLE421404906.
Sieben Magnificat Antiphonen: V. O Morgenstern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a19d27ce586f0ba2ab2a559e3577f25580a72e5264956f9ac2ac347451296. 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/NLE421404907.
Prayers of Kierkegaard: II. Father in Heaven! You loved us first!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab489b92324426368e42470d4015dd5e89e99453040bc9e2b54f3f462c0c34fe. 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/NLE421404912.
Four Songs of Love: II. Until the Daybreak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2474d7d9db505e57305b0f4f0f17778655ca8a65dce5f3f35e070005f9293b1. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NLE421404914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7fa1ddcd46b84c0fcb7582aa145d7b347476c34325ec228ad599c7aaa87b27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLE421404918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8924e4338d4cb6fa3e42b7249ea8352456112d6feded28311aef9b8a5ed684c4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:09:23Z), 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/NLE421404919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2c3001a5de37d369e4f0af094a8c6a559f69d2a17088230f15d9facc750d10. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLE421404910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cbb5037e5ef16e18ff27d4ba90d491c54a1b1aedc7ffa2fd17f4367a431d4a. 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/US7851700232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7075bef216f41c9cbb1fa3a20fc393ee6b60d213c9b0ceab048fffbc40636b9. 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/US7851700234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1e06fb076e8f42eb6eb77eca4d0f7776f2af70c75408dcf2e0b730e75a4a73. 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/US7851700239.
Frizzante: Celebrating Vocal Music Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f6e54e191816d75d6b47749ada8c4337055d2bafe5e4fb884207cbd1d1e06a. 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/NLE421902517.
Pictures at an Exhibition: Promenade III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b3fff06086477418106f778d3f6927da2b9a804e3eaecab5ec7062471451eb. 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/NLE420900910.
Violin Concerto No. 3 in G Major, K. 216: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d112da9536ef6c5bdbef1c3227e910d8626ed43dba4ff7deded10b0635da1. 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/NLE421301302.
Piano Sonata No. 25 in G Major, Op. 79: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f6a87714a15725bc31e760ead0b412224b2864bf4e19afa2d39b2af7c18c6b. 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/NLE420801502.
Piano Concerto No. 1 in G Minor, Op. 25, MWV O 7: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c57743896bda85c732c02da6e3b80faee66317ffc9690c603ee5b1a6591a3. 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/NLE421000102.
Symphonic Metamorphosis After Themes by Carl Maria von Weber: III. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c3085dfb04ca8d941e97671987351fdce13c61c81cf27ba4eeffcd001185cc. 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/NLE421701403.
Waldszenen, Op. 82: No. 3, Einsame Blumen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefed7966a871fbc26b8c22dd7ab38ba0047254d8a5e2f831be2b9e83ea7eaa1e. 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/NLE421100903.
Violin Sonata in D Major, Op. 137 No. 1, D. 384: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846cb11fe5bfb733de57ab07473458ac6cc6f4529bca73bfbea7c9415a4b360d. 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/NLE420900102.
Piano Sonata No. 31 in A-Flat Major, Op. 110: III. Adagio ma non troppo. Arioso dolente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddd556d836a74085b756de62378b232713c3cb2ee0079907db0ca5ada357457. 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/NLE421101406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e714c6d82435bf096399f2d5554eb0cbaa2d24155cdbc76d2af0980f94e1b9. 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/NLE421402306.
Wandrers Nachtlied, Op. 96 No. 3, D. 768 (Arr. X. van Dijk for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94426779aaa088400c25f4a67288938096a53a454f97ff23003abda6cd42fcda. 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/NLE421701509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7fa1ddcd46b84c0fcb7582aa145d7b347476c34325ec228ad599c7aaa87b27. 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/NLE421404918.
Abendstern, D. 806 (Arr. X. van Dijk for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ff01f3bbad2f62c7c9006cfcd3750ee8c030873cff569e764eced6dcf605f. 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/NLE422005308.
String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante e tranquillo (Arr. M. Mussorgsky for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee127bd22e5e7c716eb7cb581a821c5f5036789ffe9165b30b459efe311a08b8. 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/NLE421903806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1334369278876e8e5d5693a58fbd55d1bd5bb46bfd9d6969733effa6495c6b. 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/USAB11663701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490701195c0ec69a1029a0889162f6cc034846388b64ca28f3f953c6258f86fe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USAB11663703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803a7c0361a94d60c9ae04e2c8db2eb71ba0c4c730c4b647914bccbd03fd18c. 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/USAB11663705.
Rachmaninoff, Tschaikowski & Whitacre: Lux Aeterna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b34ad57544f36239b81cf6294210103308cf6768ec7de2d82a937dac6442221. 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/DEG021020001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e38342699040815efb661c86d1ca0ebf4826cd413e90d4825ea37f1a3f49495. 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/DEG021020005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41eaeda05cab1d13ce939dea24f9ba4913b6a1e4ed419fdbb89ae7dd211cc97. 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/DEG021020009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19450e6ddd1ec4aef65ceff61e6f96ee92beda65a7fa6bcee907844177f855f3. 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/DEG021020013.
2020 Texas Music Educator's Association (TMEA): All-State Tenor-Bass Choir [Live]
2020 Florida Music Education Association (FMEA): All-State SSAA Chorus & All-State TTBB Chorus [Live]
Lieder, Op. 12: No. 2, Er ist gekommen in Sturm und Regen (Arr. B. Williams for Choir & Piano) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fda97bbb4465e51492bafbb216101655d46e4a6cdd2dab7b89711b8f0086d9. 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/USVZX2014304.
Elijah Rock! (Arr. S.V. Gibbs for Choir) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d0125a0561ff99966c4aec98fbc734bae10ff0a7b8462cf55a219cb15f6101. 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/USVZX2014306.
2014 American Choral Directors Association, Western Division (ACDA): Counterpoint & Mt. Eden High School Chamber Singers & Women's Choir [Live]
2020 Texas Music Educators Association (TMEA): Baylor University Symphony Orchestra [Live]