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 0x182d7fefa7163c1115a1a6639e7f3d0d76a56b34c434ce767c69869752e1bee9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11473906-d37e-46d0-94b6-e0fdaec37120.json and https://artists.proofprofile.net/proofs/artist/11473906-d37e-46d0-94b6-e0fdaec37120.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Beauty of the Waltzes by Strauss Jr.
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 0x7ab3cc9f68db9a5bad72a70c79d33eeeb5111634afda1a79f7e8633d0dcc2278. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJY2177465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765f6277a0ed27da66e85d74d7b781098246ec00adad7e6e5f96274f476eacf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJY2177466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242100cc36e0f991b60c1cb98671d134a01936445ffb1d1af2635d4b285442da. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:47Z), 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/QZNJY2177467.
Selection Of Waltzes By Johann Strauss To Read Your Favorite Novel Vol. 2
Selection Of Waltzes By Johann Strauss To Read Your Favorite Novel Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1843ecbd6f330baa9c564cd2702a32f50335d181d38c6ae0fafbef2a9eafd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTPX2435713.
Johann Straus - Unforgettable Melodies Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56283dda610bec21e70a92453198a186636235e5582349776722b02ce85411dc. 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/US6PD2401710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecafad1c0ae4a29830fe535662fba031cfc1bfc5e58fbc8d1fdbd02db44a28f. 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/US6PD2401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d834b38faa90d4bd6cf5bc173b3bdbf7a5bd880e6a5e1c9b76e32a7c30c329. 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/US6PD2401712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a5a3dedd89f9b7f65617c363507420449cc509d9042e2b38d25deccaa33cb1. 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/US6PD2401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5eb7a82e12b95545fdcae9eae9f6e6a8f6a5e93e4eb8d32a04d1195cccfad0. 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/US6PD2401714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf163fc9633ac03b34671771e8b3a20b14fd8fd83f75c2bf718a0e68d2e8d91f0. 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/US6PD2401715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddaa0280e4399a68e5bdd45f00cefff401bfdf856fe581f547a4b9fffab031f. 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/US6PD2401716.
Strauss - Tales From The Viennese Woods Op. 324
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cd7591808eae5f7ff8596cf617d9d099d82870da159863407118010e3bf122. 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/US6PD2401717.
Johann Straus - Unforgettable Melodies Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175532a8d402e04c3d01a2c219dbe3abb555c137b95f0a65d3d3710a9ac884c4. 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/US6PD2401718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7ca356bd6dfd55ee775dcb6b042cbec0278f8d7b88f4e380a62ac4cb107622. 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/US6PD2401719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44204ecd0a54ef87644006a821ba63d48dc38339a764b702e75a8bcbefdf772. 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/US6PD2401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d79bc495d9c882a78e82c658468ae0cc17836a270acaf29289e3671c4a75f. 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/US6PD2401721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3271820ec9132c02ec561f689a789bedebd9c9f2cbd4f08cf2e3bfafcf8b7e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US6PD2401722.
Strauss - Where the Lemons Blossom Op. 364
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92018a01ecd873c06d4652d350eebf93c28c9f25de12a8d97e31d8be2c084d48. 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/US6PD2401724.
Strauss: La Chauve-Souris, Act II: Chez le prince Orlofsky (Résumé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07b1571e29218a48ae8d32bc26ea1a411febff7be86af6b296ecaccab52393e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6L2502059.
Die Fledermaus (The Bat) Overture, Opus.362
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534a0c71acae8fd8e5bc2e40840100694196aa6efabd18869ccfc3a9f384d299. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6L2502060.
Myrthenblüten (Myrtle Blossoms, Opus 395)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea89870c906682e1904c1d02e3ba579eef197ae22988e76e9220c15a75fb9ceb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2502061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb108517c057e2c4b3a2ea3790b27aafd896138840e80f4095ff06a1fff0bfa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6L2502062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d59a0c630cae709c4fe651bc8e7c1b38c80202a3c452e7dc5a5396a6d36bc1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2502063.
Arreglement From Der Zigeunerbaron, (Duet from The Gypsy Baron)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab392ba393ea40fc398f95f7e8053fa88037ded8586ea4bac924843ef2420b47. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZK6L2502064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3b89f6a856befb7a29fd7e0d9dcce2a5c87b14740960c1bca8105ce2c1a88. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:10Z), 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/QZK6L2502065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd7ae1a58af6432c383e3375b3ed7771bc00117711f701def6b9dbaa68f4e73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6L2502066.
Timeless Melodies-Johann Strauss, Vol II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761972ce37aceaab6c41f73787a41df5b8eea70f36dd74de8c6c3e25c7573bce. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:25Z), 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/QZK6L2505470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313133ef2f669ef5c19d70b34a31e5519b66d329bded65a673bd6800bc0db8db. 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/QZK6L2505471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995e36d764910e278b2a45a42bc4cb92959de6cde504200b1210ac050b5a1056. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:08:44Z), 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/QZK6L2505472.
El Murciélago (Ópera comica) - Die Fledermaus-Quadrille, Op.363
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15b8ad6c8a487bedaedaf48472492b73e15a35a45bced1bc56029238c280584. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2505473.
Frühlingsstimmen (Voices of Spring), Op.410
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b1c942076afddb4d8f14dc4777770f04a47d74a938bcf50d017fcd93ae953. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6L2505475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9224cc117fc5269ce1c75ce7a6fecb117455ffadd6b572fcf6656a44b56a8e98. 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/USX761423706.