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 0x40537e524dd8067d6198ba9b8235d9ca0e5632dcdacfc92fae92c46384d21849. 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/1494cb3f-bd22-48a3-b82a-59124ce0ebc5.json and https://artists.proofprofile.net/proofs/artist/1494cb3f-bd22-48a3-b82a-59124ce0ebc5.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 0x3c40a571292cfa7d3bb37b7bc4faba73f32568bcafa5063d089c336b84d222b4. 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/NL9KQ2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ce479ba2b8fcb796ba219975ccd7218f38db095a306a144d00a18d2cac8ec7. 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/NLQ8D2200723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21945b201bc39260f1a1d427c5d33edfd0d3c9d309e517f3c537259a0cdfb75e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA092322940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0486c1042ae50033b78138744e779899ceee998810e1f11b1997e4d1ebf08e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL9KQ2390080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac4f3d6e79fa5311ecdd7f86728149e5d1a87b54a671a53923c33f92497873. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL9KQ2390100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e4bcd19435229014c83119e34e18b400765d0723135f01002ce1872165c35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL5WB2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094173a2050799ad7c321f7ef065ff981f342b848b3889a628111443596dd7fc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA0L2343748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94c9fcb17cf9e6e35113505c5ddee8158be7a7521d3510dab7ab2dfa5d2aa53. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX8LD2368587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bbb5e6dbde8ffc77505dd907b1a6c0c41efd50ddec7d460edcf631a6e5e3a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX762467982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca123863d362b665b9154714e766c35cddbd26ca24b26144d07717005bb42f3. 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/DK4YA2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055a6e9689760570fd38f9cf3d96348a0f08edd3f252806ac60607638b4b5a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX452403962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2fb79b3ed85e647d69b7aa518e59b08503dbd315de0a33d01ff592af8737c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX202445490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xababcc72f87859e1ef6421636302f26216351626ba40b0683fe1e020bd7c1d5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL9KQ2390324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e0d40e5f2e33b1de520a25521ed5565c2926fccc0fb85db4dd3f00010a150. 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/FRX202403221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb585f2d1285631a439a0dc01255be87d06c5e45bac90e27acb897f2164953f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL8NY2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4b243ed2a332da9da4351087a7c1bdc2275ba22b13e774c026cc85bcaf8584. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL9KQ2390202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566958c4ee78d3cfbe3597883b4222e0cf2e8200e5a746b1ff3598780d21a8df. 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/USLZJ2416753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a49bbbae6ead7678b7fefd29e41e88dc534f9b6951faa789b3d586fa52e24a. 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/FR59R2461294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6431007b4d62d19a82589d49849ac26548a421b6f09dab5536bc32c7f9278a4. 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/DK4YA2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c2d23304fb6c2a1f9c03c5d6fe3817c3ccb0d15053c745af7924bdff63fca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL9KQ2390169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e69563a074931d40c6ecbb944191a28963afa1f33806ae6130e4cbcc34f3f8. 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/FR10S2498519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4be29f88f7f44bf2034d7f99381c9da7211707eddf03191d3ab13a03b69227. 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/DGA0Q2398506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d675cc585f88f46300f6d14abec0af817570f860faab2f28fb2ca58217df9d9. 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/NL9KQ2390133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce53e3aa14bb037f1712415db97097c66fb6366afa7f78249264c6b63b409d59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0Q2348331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748ae79cbb454bf81ed3fb5cf3a79ea0af52e062f3e663960c7661bbd7e3032f. 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/DGA0L2371371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83b7ffa94ad39f1854558b00f5d3487153dd9e61415659f16e7a32ced90c57a. 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/DGA0H2316072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac6a17a0e094a39f1b1f779c0198def854a93a34414a6f2e7ca07b940fab5c1. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DGA0H2316073.
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 0xbcb027b9668da9cd842887f7d7f414162e5fa959bcf4a5a0be0e667a4156fe80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA082306699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0274b12905f2d9914a10627bec55f6151be9b68a80fdb8ad30f8fef0e913ff88. 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/QZNWY2331449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ce6b2bb167fe3240d9edbfdf076d61b7fbb39a6388d870e09682824c8ed88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LE2367848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ce42c91f0a2f117175024eb36a63f0d0a85c84116e39e03b75b678c8a79ea. 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/GX89G2305834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd757d1b9070538bfcabb1ad8952c844c0def7d2ed56f826963b6cf7d290c759b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GX8LE2264114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb44de16e211aa019dd9d474dda9af97e412633cd675757b0298021266ea2254. 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/QMDA72205678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cab5fd96586f61abe4048b6d86c1408198e9879c82040c45619f427f8f5fc3e. 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/QZNWY2263309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fee722efc8dc370dafbc9fcb2399d374eb10d4dabe43df66f01c3df51710062. 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/ATEK02277302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1306e6cd612100993af5cc639fd2fbc6f72eaf95f1ed15e558b7ed5714ee99. 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/NLQ8D2200853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28c7daa93d8c200e1610bd3706f3c73b7f7c15504babf3d9a4c09a6c3fb408. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLQ8D2101494.