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 0x3a6b141a40da304c17960541dd77f2009c245df821f5595b2b6cebb4f085aa58. 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/dccb57ce-7a81-424c-8389-26b035828324.json and https://artists.proofprofile.net/proofs/artist/dccb57ce-7a81-424c-8389-26b035828324.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 0x302f9d8ffd4e91849666b5b7c63481d536ff4d117725fb67a99000bcadae4a35. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/HKG731620453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c78486e22679f5601b19fdf1984f612c41b6326a16ea5c7a0fa1abdee76cf62. 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/FR96X2390710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f111c911e2089215bbfef0286eb8fd15c7cdbb4a4e82f06e96256438066d16. 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/FR2X42367997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0349217d562f150edde86ec98201a72f4c0aa9564a8243e4db35d731c903b25e. 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/HKG732420081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047049db8c2e6c20801c1a6e71a8757f49c9aa6405c949b60fb09d56e1e40a8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DGA072430656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04babaaa13b055de419f1e22d1fe289ea9314f6ad32b0f16e90141cbe61fbe6b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HKD012281834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5d0ec4dbe94bf950e50e4a528abdb3e583fc5b46ec9f7a0828c7edcac86468. 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/QZZ972479907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ff7797a5bafcf1824cdb4692b5666a88ce3d91e18990bf7a5e7e082c09a35. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG731620444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192c7da6af5fb75a4708a4c063de34f7aed24b016afb7a3d72ca05292a7bc55. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/HKG731620536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec7b62973896a424dd728ac29257306cb45549b0b8e05c21493aeeaac7e3158. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKG731620442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42bbbf1806e485e1261059c899c5f5514b4dc076748dbce13130450f3e3d744. 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/HKG731620443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a5be6d313c4c0097dab961c3d27c149cc40aade00ef5e596f11eec4f5322e4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/HKG731620446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d89be9166fb532da5b99a5a7fb632055663b2fd379e004f511520aa627ccd3b. 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/HKG731620538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e30f0685a1cf97168a74547b00dd9173186d1306f715f01ec09a5f7705caa9. 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/QZXLZ2317027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe27343632ac6d12c9061225d906ab7635f0f5bb6bc502c80dc1625095446501. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/HKG732319662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee74d6b1df4d1c87653b861cc0ecf35cf37c92d946a835f36a96cbecf161a058. 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/HKG732274400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8bed0484f55100590dc2fb0c1794eb43ba0ee0d1fa306de5c67c8f9f1e7fc9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKG732261750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f387f69102ca0c7e945fbfc134e159fb02f2e349a929d4589171195e6812c8c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWDL72204425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfbe24574b69207327d2fbc4734d60213ffe20f8deb99dd2ca6b17124f2142d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKG731620447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf757e9731535e01332be54c701e2b3b5b2bbd74588f7e142e57c4215add0b0e7. 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/HKG732203471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f76a7ef7bd3298495b5aba2064d00c74cb4ac5552b805aaf31cc09145126e5. 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/QZZ972326375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c66516591c2220e77bf916560b5ad7b46b8ffd4ff6773216b8901c117e5159f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG732128602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562bfb7f7637247e0f667e9ce08780f6c219726d28013f11bb13a30863e7559c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG732152474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6b03ae35b431f6895d261be56b259ad9f8a347c254ab836911a91406875049. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKG732154056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e397ba75b8a7673458c24ef747b92ea0d47803d16ec23106ad930797ced736. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HKG731620445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4834ae12df4fb51b3e94ad6e60622e7668e903b33b76953814fdb081ce876740. 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/HKG732111272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da15ad2f6a0177de63b2fdd5b22d6501a83e5fd90840260ec22cb5cca0205a5. 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/HKG732106613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749f2d8b0314ba2eeb7029cfa661f83e46d15351ce8e6db8dbe1ef4c58e12587. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/HKG732106627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d5006314ef1ee55942f744a7627fd25f87eb8d83395eb7cf532a6252505e13. 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/HKG731620539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9432fb40a16d4725c49d3f334218294c296314e8c6467ffb3bcfb6674c2f08. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732142205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdf2ed06116a2312e57506ebb2803a3fec669a61e2ed695198cf3561bf8822. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/HKG732105371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b86bd243c1e24d2a9f0aa0dacd420bae08bafbfa29c3e98fb873167baac5dc3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732102561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24236a199aa9635f57748f5a0582e04cb8e610ac01d6add4bc15534b6aa7dc98. 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/HKG732102562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa1d0af48ef9eb91ea292ed95da3b7fb9648faafe8e1c09b17d35caa289c838. 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/HKG732120892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873542083f2f0a183ae91a14ed2806efc1df4587f7b29e2e683e922c740ab417. 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/FR10S2320065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55d696cd72dd382a3c11276aa0e20c45ac2b6723a779240f02f73dd9ee41de. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HKG732298375.