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 0x1819ab79d1449c3d1f7eff928ff73087b314baee61d49d949cb8397184181d1b. 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/86edc0cc-8b6c-409d-96f7-6a490136821a.json and https://artists.proofprofile.net/proofs/artist/86edc0cc-8b6c-409d-96f7-6a490136821a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2014 Texas Music Educators Association (TMEA): All-State Mixed Choir with the Baylor Symphony Orchestra
Insanae et vanae curae (Arr. J. Barnaby)
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 0x9710e5763a9f034f67a5386fb6c089a7afb3e6d5c24ea97a628ea3f46cd66386. 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/USVZX1403102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9212441a0777e4035365eb2633eade20780eb8d7ed4511a908974b02e2db2e. 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/USVZX1403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc371ef17253bb43520c1da1b0dce2a951f54536080882ee44aebb4ce001d5c7c. 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/USVZX1403111.
Candide: The Best of All Possible Worlds (Arr. R. Page)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a4fb51fab53e19c66a823e4360c2a0d883aa57302a21e7d06761040b3650c. 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/USVZX1403110.
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
2012 Illinois Music Educators Association (IMEA): Honors Chorus & All-State Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b7a6176c36d28025cc898e8544400704750d4000e3b3c83d8bbbbcf1b23ae. 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/USVZX1205605.
Nabucco: Va, pensiero, sull'ali dorate (Chorus of the Hebrew Slaves)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8a064ab8479c28b40317080fb8af0792bb808f6071a6e7b618fde4099531bf. 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/USBC15900238.
Zadok the Priest (Coronation Anthem No.1, HWV 258)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa518b3c7413a9f2b3c856082d0bc5ab27681246c5c06632c7ea3ab5d55a759e. 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/GBARU9700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2b702911c90097b2d653144316f03d43d1f80c5fab41e59a80d8c7a2549264. 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/GBARU9300002.
Requiem in D Minor, K. 626: I. Introitus: Requiem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ae08742d5480db27995d2bd4920e6fa1a9d1008ae63e04750581023f5ab0d. 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/DEE860901010.
Requiem, Op. 48/N 97b: VII. In Paradisum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ed60d8daf297129b534a535bf9c05520eba723258afa133c51e306d4affed. 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/DEE861101045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ab9be62a87daecfe00e71f64c50313525ede0e0625f3c18d54c7a23e6006c. 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/USSM10018924.
Matthäuspassion, BWV 244: Part One: Ich will hier bei dir stehen (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba409848bef73ea25eb49a9831fb067803be355c298d1464a7dc5a966c8a6305. 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/DEP620001117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498e8b4780778c8e85d9097c608398be88af3c8328a696ff3fbd123ab901e94. 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/DEE471300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518f15c9ac559c2fce6b62fd0c320e0de6ab56611ac8a4681e52ff8468a64d5a. 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/USBC10000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852a1aef21fbbdc032b5c3b50daaf7c5611485ce2f36ae426db48fe5303a78a6. 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/GBARU9700447.
Pomp and Circumstance, Op. 39: March No. 1 "Land of Hope and Glory"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0361026d806fe08f0da5881de18c6b5f295d97d0f7eedcab0edd9ed8f8670e. 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/USSM11203567.
The Ultimate Classical Christmas Album Of All Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fee54f4d9b13586135301fdc53fb9877ea98403432642f34c02be2fb7362fc. 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/USSM10210634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6dc2f92c0765478d75816bc7ec0c03c5618819b1029f991bbf9651be5977c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM16801465.
Wiegenlied "Guten Abend, gut Nacht" Op. 49, No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2ac52b4fb1877b5b77da69d2d40b361bae73c9a88c5573f3519ee47b6916bc. 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/USSM19905419.
Advent, Advent - 24 Stücke für die Adventszeit
Balada, L.: Muerte De Colon (La) (Death of Columbus) [Opera]
Leonardo Balada: Torquemada and Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b0e8203ecb71b3205416f72edd43eb70493a1e6d5ab3ce2afbef846fecdc02. 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/USSM16200421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ebf200ee40a25afe64a55e41107e0bbcf99dc0170d739864edbefbebebc9c. 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/USSM16200420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee827e13972fd32cd45e29e5acb68627345713da6b0ab72149f304c232858e. 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/USSM16200419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f81580b730db08928f9d014879a964989b08b6e723400ec3675108b3957ff. 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/USSM16200417.
O Come, All Ye Faithful (Adeste Fideles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a12ed94d62289b1bd4386fb17970204d0b1a658e6f6bb9691812975b67ad2f. 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/USSM16200428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd2e38d522ad389bc1c1a40d28786669d89e46b22519b4c73514f983cee023. 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/USSM16200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce73faaadc0680497a0edef1198a933df1146b54afdb9f941bf419d6dce70577. 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/USSM16200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ec8919e70046f0cd4523d92f7ae7dafbdbd58379196178354919caa0295bd. 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/USSM16200429.
2010 Texas Music Educators Association (TMEA): Texas Two-Year College All-State Choir & Juan Seguin HS Chamber Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed20edf2509c8dc8ec3c00c3a2769c597f66fae5ef086268af1350e45689d58. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USVZX1220004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae6029d13707bf0bfed53bb83863c1527fea007346cd5cafc3558b6c480363. 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/USVZX1220017.
Eugene Ormandy conducts 20th Century Classics
The Joy of Christmas - Original Album Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44501446ec5e96f038ee6eea9bb9a9ebbb6dfc5f2e460eef5f22b3dd54843716. 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/USSM19913485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d573edd8187fd2647de5e28bea0c37919c65b7e56b7e420e23e927814b2c14. 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/USSM19913502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd975435f73fe5b06238f1a673f288a18e7b184f6eda33e40ebe9d5ef7957de9. 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/USSM19913509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd2bb116b82e11272af1a6c2f681d7f9e2474d19388226a91536f2a70f6d3ef. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QMPKX1662519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e56fe2e1a24753062ad03fd629aa5fb942d1d492b06d22d199f7e560a04ded. 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/DEC767600012.
2014 Pennsylvania Music Educators Association (PMEA): All-State Orchestra & All-State Chorus [Live]
Christmas Carols - Die schönsten Melodien zur Weihnachtszeit
Ives: A Smyphony: New England Holidays & Orchestral Set No. 1 (2003 Remastered Version)