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 0xb57b30812dd88cf5687b00da626bb21206d1e9fbca9751383dd4e595f9fef113. 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/9dc07e60-2b79-4334-b30a-8d44088f8845.json and https://artists.proofprofile.net/proofs/artist/9dc07e60-2b79-4334-b30a-8d44088f8845.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 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 0xd2e17aa527b9260b51c4344c19d1211c19ad386f213de262f4ff3d9ffeadfd40. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX202514688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4907fc1f1f6818b6bcae8d011c28de917d0d0459740074ec152f46fa99082c. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/FR59R2587258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f9d0f216a5ca7c547c750fae32793418a01f9006406a12f818ae9c6487b5a9. 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/DGA0S2489132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba00987f64aad57c0e6a3310e3a30d23a7783d7fdbdcca40c4b2be179cfb197. 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/DGA0H2485474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d40c2472055acc7dd68ba75a3bedc7400585404946c13826fb3583cd02064c. 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/FRX452481094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa0d2f23f45386506119d21acf173c240352a3f1eb76b6b16971645fa3eda09. 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/FRX282459884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd9fbe5ee353ec19067f598f0a10d85dd1f22e00342888541e1dbefac3fc323. 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/TRAKF1624017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d025019f4fdfaed9e73714c9781b9035e988f16f62d8ffcd3ed33f6ab0a75. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR96X2466488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81ca7ea6fa13f1c8e0f01269a230fa3bfa8caef358d8b9e653a734daace6f75. 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/FR59R2427964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293f56fd0436abc6bf870e4205edba18ab6304a690d873b6ea855f6a7aef7cf7. 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/FR10S2474370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2b5b6116b4ebf30b453fe6f07421033c8073b62c5b1b86ef050525c345cd3. 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/DGA0R2304467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80caf5d38526eb3090b18aea687381c1008d0731ce3a6c9fb629b7a82682bfe. 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/DGA0P2320851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c35d31be4eca039c27917fa38b49098cf852261ac34cb3e39f5a9ed765ef1d2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DGA0H2319412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9003bc7b6a08fc43247824fab03d077334cab5ea6065314769daaea5d902988. 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/DGA062332944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d2ae507cbb2d4fe61a7994635e5327bd28d3de078e8ff08c8c49f683edde7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA052380582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa145e922de21143a6ad9c15f2a58cbdc1383106360534ffb4fc5a9fd13702b2. 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/FRX282381839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44644db880dcced58fe909886daa8c9147fa34b657af6229fdc0efdd685b11ee. 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/FR96X2348734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059e4b954cb75ad8d32412268a82b29a8f45bc34c66bdcdef90a26f5cbd0f333. 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/FR59R2387272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83680230b0a146b6e59966a34d0a9d4b0cd02d909b448a28613c9bafa07748e0. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DGA062291634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b246b5c922f91b52da1c0366b5cbeff609daf76964745d25d6663e5cf8fd87. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX282242223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc7e33ad84c2937bf9046c632b69f4992dbbe77ef9524abf19ea1c5c1fb29f8. 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/FRX282242228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08f15379a04f100725cfdc0bff96461f35c8dcf048957936ec732861569e1c7. 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/FRX282242202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b1e8c92aaa55625d281b8eb619d97499c1dc7571f569dabfec8580b8293940. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRX282242403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c150b99de9e7673a3ae3ffaf687975275f0f5a2ce86ba64cc4a5baa8d9aaccb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRX282242224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8883b6475e7e1c71e27a0b95300eb033f6a0cf057615bd41c33b3266a1f9d93. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX282242405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747d07c706ff62f1721495102d611fa04e0f49c0a5e8674401da80a8bcb5e1d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FRX282242396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d3ef88c0ee089047ac2faf90b202ece6d66c6a0f3b5f5e0c4236a07e5129ca. 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/FRX282242392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb64e9f5fb88db42954a735d4c37751c8c510262372ed6178a54ddbb713d1f5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRX282242390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd681201100f1fc76cb39c466f6f0deb34baf0df56b804ca1e00484f7fa4f2c9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX282243134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f770917196aac9b8cc204fbd8cdf85cdbe41067f9e4978d5517b5ba5f913b85. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX282242406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44489168235164d547e398d69ee5e948f6379dde4073488a73774559bb6436f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX282242229.