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 0x3156ebb7ba414caef74d0ebb6c23650997e4a3c1679692ddc839f11be7283581. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c318ab56-a4ba-4815-8803-bcf19f3fa55e.json and https://artists.proofprofile.net/proofs/artist/c318ab56-a4ba-4815-8803-bcf19f3fa55e.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 0x62b68bdda315404f3d922bddcc10fa98ff159f638d2be6c4ddc0408659377bd0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/MYSW10892327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b9950c64eef158dd5e38e5f3cec8eaab8c69f22d44d2830811d4e23b0e6bb. 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/MYSW10891564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473eb626dad1bf3e3ece03d071e5d06517cf9afa574758a211fc459f059b9bca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/MYSW10890480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2171a32c227daaeaab4029a4948480c0f4a5a4306f47fbc50af13e791cc8248. 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/MYSW10892820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361f9cbd494e124ca0a4a84ea81c6a67b82cfef374a9f7b08ad143fd803da65. 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/MYSW10891558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af31de9e5398613b93d5481f2a55cefbd840a147257a1d2c5a47c6585706444. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/MYSW10892166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13165ae54f5a30d9d6a77c1bd3402b4c62873293d086095ceff2c088f2d2bbc9. 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/MYSW10892840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927c74265732453ca79dbbb14c06a0843631ddc3b560acd3fc810ad77674b72b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/MYSW10892812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5d2fbac1076eb570ba1b0899ba3fe53d59906496df6c763c3ec6802939bc0c. 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/MYSW10892809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a7b65965c3006d4dfd0a46622752b9172b126a7bcaed46eec4ec9c827a1e70. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/MYSW10890482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5926b885129dcc6eef277665c69a8cbfc845b6e2f4f676b1feb95c974ab49351. 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/MYSW10892158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf906322c346126d8c1eed707d393618b976194c26ffebc5a1525c738c90789b6. 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/MYSW10892810.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a98e8471e6e6ec6bc0137dabb13295f0fb9883af8c27840b72437fd118a0d. 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/MYSW10890180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147dc1e740cac701421a0c7e8e7776d818fbbfa9430ed5a964cdef9cff4c2688. 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/MYSW10890131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a700ca6fffaaca1ce37bdcb5338fbd63dab2978ba53393178c9d09aab7798c. 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/MYSW10893049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0b6cdbc77a6931bace56d8f0ae7ca0875fa0ac24eb84740f822dd80d16074. 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/MYSW10890189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5720bda60376a059fa743d649e5d87509c59775efd8ad69f41d5ce935fbe07a6. 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/MYSW10893050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd18e25164f289d6b178a7d9069d8dfa071e967c83abe4589d56702b18b340fe. 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/MYSW10890190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071d8ef50466298aca4851c2461a156c1b986e64b21b8a9ca1ee8fc52b456fa. 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/MYSW10890145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6794811693f5d2773d8403cf2f7932855d416f96cee6ea6696bf0418526f50. 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/MYSW10890144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc106c9906da3335e339a4c5f79f4b7ce76d3aa6f46291dfec318912564ce0cce. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/MYSW10893051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a617ef8bb907482c7e7c559522ca7202a576934d4428249b84a03f6059630. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/MYSW10890920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09989e4d1d4d8cc493a217cba9bc758f1f1c3be8c4f4dea38c81a5f50850b418. 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/MYSW10893052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02577ffde29a437316fee60c4e5970e1e54e2e2a054633ca32eed9fa8542f422. 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/MYSW10892805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39c40765cfd150edd803abc068ff2908b38d8f03d807a5db53c8cca8f74c78e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/MYSW10890108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8db92b46116df277dbaf08ba1ac58b3bc4132741be8967a1d97673bbc9ca15. 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/MYSW10890185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873edf19ba2adb283b1f7a19c83bfd6045366e53d5aba045e286b599abf3171b. 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/MYSW10890187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d8015b71b2e954ca1f7f5ffbcaf29a481be30821d4a8e7f127a3827eb3158. 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/MYSW10890143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4fdfa94896e1b7bdf1a8cf36b2563662f8d6becea2ffae9996b4180e8d05cc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/MYSW10892786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d97ba62de4fa332f42b85107ec0dc4a85ce9b83d5de92cc0edd46f4d1dce2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/MYSW10892319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6d42757fdedba40e4538512e7b51e766ec8758e920b484222bba64a36de9c. 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/MYSW10892329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7477d0eaf1e8f724610fc9733ba4851e631742ce701c2072b1990c597f2a2f2f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/MYSW10892106.