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 0x75718d129bd5a4896612596887b27a5b2fd823aba2bd97f40061a60a7bbb121a. 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/0646fd04-6aaa-4f33-9411-4fdc3cba8006.json and https://artists.proofprofile.net/proofs/artist/0646fd04-6aaa-4f33-9411-4fdc3cba8006.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Capriccio: Mid-Century Music for Clarinet
Stucky, Ustvolskaya, Salonen & Brahms: Works for Clarinet
Ballet Music With David Howard for Barre and Center Floor
Plies With Port De Bras: Barre Technique
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 0x665656c7512aada053dbbb4fef54df01d806fa1d257012ed41e01aa51ff36476. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:39Z), 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/USX9P1348269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c3ef6b3bda8136936fbe728eab5e7b51f4ad623c4b010be5d64dfea25e5f5b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USX9P1348270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc6ad62c015bc0eced8de4e67594f6e8e905a767eed724cc0cc8617fb1e7a41. 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/USX9P1348272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef9f29372d01c8de6da9cf478c8a957da38cbea47c2af26d6401e6f28886548. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USX9P1348273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590738510790dc7e1235473432c95f373cc3a4eac6d9f3a3597306b8f73ec53b. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USX9P1348276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034264a55ed8a752da8e6f5946efca36d53c22d50750d54691ee10585e4a4c52. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USX9P1348277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a571fe86b58610b5d3cf57ae8e22882e2546e68db151a798cfc774ea06409. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USX9P1348278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dc0d5d359181155d8de1102efbda4b9f07fb057284e79333fdf9d592a9ef2d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USX9P1348281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c93780e44b3bbbe0d7146a85a273c48b5ca8a69dc4fa44311cd9425f5add0c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:24:25Z), 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/USX9P1348282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba66c7adf7a6e276518fd7a63132f9c42e555014dc3e8ca77c6221d9273be4f4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USX9P1348283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36babb4dae95bcb30c6f5a4c3a74774a8452a232e777e0200206c7df89215c86. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:49Z), 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/USX9P1348284.
Pirouettes No. 1: Center Floor Technique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d3794eba7d28e6e3ecffd7e6fcfdc290a31789ef81a100c337efce707e105. 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/USX9P1348286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e8b2cf9538bfd23c205d4d0b2cad1f804f3bd35baa9eed811c542942315df. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USX9P1348288.
Grand Allegro II: Center Floor Technique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe2ed8b81519427535c97d2ec29755bcd79ed366f61e5711df23ab336e58608. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USX9P1348292.
David Howard Presents a Great Ballet Class With Pianist Joe Cross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe596432cb551f3cea7251832f442dd314d6bd22a3bd9ac483b30efbc36e4fca0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21485247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8bac6e8d9d61bb4864ae833f5ee8b36ddab7b73f3859cd5722865d96aa82ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21485249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6442268304c2257ced561226ef11a8608a3a77469dd0d85db4800b81a265eb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:54Z), 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/USHM21485250.
Dégagés With Rond De Jambes: Barre Technique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c817b85406affe6e44e2624102bbe084ea8d41dec301d00bd31e785efc513f. 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/USHM21485251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f050a260665ac6ea6984305c62734417c6e9799d919450e4df5e38302445a73. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM21485252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758fa1b5c1f703201c1fad89bdea1ce6842b87907ae134e2a6243bd57c4e5c3d. 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/USHM21485253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d598960f9ebbcd7c0f097aed1cbdd6a1af1de969c8f56515ac5f4f943f8f1d9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21485254.
Ronds De Jambes À Terre With Balance: Barre Technique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bfc910ef10429744bfc2b9d3874a8f3cd21759b8b70444c8fbccfd9b8710fe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM21485255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547a497780fcf84b8760d720587ca9b48f0ad5826a5ad791270558daf3c07193. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21485257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd594ce1db98da871f53f38f4f7d7ff64e37354356e1cf2f72374978b31e782c5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM21485260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28dd91d1a4425225a351b17eb42cb313580545f406587c680fa859aa05ff6c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM21485261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58161fb6877527a7bd632763954ee6a44421f02dc6970c0c241b90f682554959. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM21485262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d836b0f96c5135e937611ecac190fcc4a16936fe5d691ac0a13b197a52f82a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM21485263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f57ab32c7d3746ed1fbdbc396f26cad5cdb33c306ebbb1df85060426acc5059. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM21485265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b8f43e6fac417e9ecb99af35385009d7644b9e37dd2f3d5b2cb0ac8e7a3ed8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM21485266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d3e6326ce11f53c96811b738449350183815bcc2d6c9998823fbac39ca3c08. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM21485268.
Allegro II-Jetés, Assemblés: Center Floor Technique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5d58bf6e6d9176565fda31945e9822814053e306f18987c0199156bfbc249. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM21485269.
Reverence/Adagio: Center Floor Technique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10138c777450ba074df04da26130595d1b75d7033bc1b2c9e39f866ea54fd739. 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/USHM21485275.
Ballet Music for Barre & Center Floor (6000)
Ballet Music for Barre & Center Floor (6001)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b6726b8ec1843f6117552860ebfe506a99f0792e89cefdddd6d7334c865c08. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USHM21701090.
Ballet Music with David Howard, Barre and Center Floor (Roper Records 6004)
Ballet Music: For Barre and Center Floor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa32be4b75aa9292fb7794a2b5e70b1b82b6c5833332318da40f51b30372ec77. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USCGJ1892387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1bc29259ac95b68fe6d2a2fa6da0b1dc562a878ffa95a4b90b2a80b0446721. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGJ1892388.