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 0xfb8f975e4090488de489531712aa64b176c3bb3235c809e7a784c10cd6355fa8. 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/01b3ed05-6a99-4d64-8288-7e4504d4ca51.json and https://artists.proofprofile.net/proofs/artist/01b3ed05-6a99-4d64-8288-7e4504d4ca51.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 0x37bd3852a6af4ff506c2e357eec5593e657030fd0a72f84ccb16cafaf49b8c98. 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/DEZB52010021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50652e830ded279248b24a8b3b38aee04a45b98a9611d7a1a0c2ae142ccb16db. 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/DEZB52010023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc315d5f2c7aa4f29dafb1bc42daa994e77d643c0885be14c2ad4f465d8a008. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEZB52010024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e0ee9956a08e44c318dc706014cd1a858e6504889a9c58a110d5054b64aa5. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DEZB52010401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f5075f48c45e0eaa21a48278618c23a5d7e336953ce927e7ed8278ce326604. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZB52010402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc7bfd2be440e8127026d531225f0fce5ba587fce9b627e2221ad04d47d96b4. 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/DEZB52010406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3667c16010e99e02b45a12c7b8e76e8fc478c55ec703d241fd3989b6be9d11b. 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/DEZB52310064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d4cae9f8542f0e87a04aedce55f8d25275c9fe0b740413d77d591b5bedef5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/DEZB52310015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02470478a5e9df7b3a83464c708e1cabb907e1b3eeaf75d3aa370c56ab6b0245. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZB52310018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7303ee6c3ebb02d9b58295fa8192ee2a21451ec3b4c0fec8b1f0d3e24d5de52c. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/DEZB52310240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ec66e9bc4d462affc4ff126c7ae9aba57f67d3745bea5c90ba81b4b7fd5c30. 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/DEZB52010341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8cd95385364488d7da4d6fff6abf076db22585b69242380785d3859d0a3540. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEZB52010342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e45b476c97de8c6a7215167fb62212194e1f2b3465da170f70f1e1f227c02e. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEZB52010343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d6c6b20a749bbd20839c659beb81a7d62e88ebcf45e6a7ff285bd6754a1d53. 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/DEZB52010344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc47bc8b334ce7ca2d3dd3648703d470ee18d3fd5bb90de6f43f02e1021bbef7. 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/DEZB52010346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8d138aaa221bafb36b2a45e30e4415dc25085e1ccbe6afbe2c850a6a35d9ec. 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/DEZB52010347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48bb96fa2756cbc01c0a1033eddda907904a58cfd524481ab59978a86d03e12. 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/DEZB52010348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6664ec56764fe314fae96f2aa544f685722802f9d06913fa7e7f65441d60e4b8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEZB52010349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa070682865b480f0fcb6199d42d86ec1b4a797c1433c152f1f05d6809cb272. 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/DEZB52010350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74abc82a96d0fbd57944d43933c898dde1e4d342a5885e3185ed60fa265d9225. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEZB52010176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f229b341b6b8c69ce0e43a8d518b50e25c05e723a4e2952eafc6e50277bb0a2. 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/DEZB52010177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6aa727101d547be6c34411c3695886c055ddd34547195b0e7f7c73ea490b35. 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/DEZB52010179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e125e2b49359e92fd803505d12901cb61692a12b596c719058eaf5ee769aa2. 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/DEZB52010180.