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 0xc0ea87b01cb4e4d8da8bba3b14e7dee46ba21fdf988faab371f4b80587b2f72f. 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/eef0fea0-d704-4c2e-9485-43f9e10b2f59.json and https://artists.proofprofile.net/proofs/artist/eef0fea0-d704-4c2e-9485-43f9e10b2f59.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 0x816e0bddd489f8d0df1b06b190be0bfa0b2202d6aed4bb2c3d58df793549f389. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USHM81691661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0285731212ac9e38ef76d66a5633972d79e1edbde9cdefb1c791a8432d3129. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM81691664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca0fd541164039285dc979e7e8b63da837ed2449c1b069b0b17955a8c48c215. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:49Z), 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/USHM81691670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe896e95dfc099cb71d8825676e48c5408a9b104d8d3f9d6d419f048d27601ae3. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USHM81623054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e97a55c68e0e093efa7a0a0137081c631f9a1bac0b5e8c88f5d4db75e74f7d8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USHM81623055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10f2d2427abeda10aabe4d027c8e06dd047ce2077107d57a9132151f7e679e3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:14Z), 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/USHM21662441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421734b500a38c71e6fa860ca1be52d606685f4bbb7359c287b0b7b22303f2db. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM21662442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc481e46b68ac0e05a0f4ca2374a7025a1340c1bc74dec1cdf774cda47dcc26ae. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USHM21662445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd777bb56346013b6b159c7c544b8826887a10f8c9319d8aa4900a976fe063159. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:28Z), 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/USHM21662447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187aeba21673118023c886040c7c02b3d75cfc9107b29813730969a321bb52a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USHM21662451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e361c0407fc0a151f21d5f17f1dc6d1026ab5d2bac100332938342366a139a9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM21662452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd962684e68097860826a16fc3cc1e344292a6d9cddf2be946dc8b42951d4e4. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USHM81690692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c715f3aad9c59c568cd2da8bbbe6a897122ee003bce24ef85c7ad8245f512. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81690693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf142c42a9a22fe41fcb13d9c3d4e0f18fd3566e5cbcbbae0b7de4da6b12438fb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM81690694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca34ee62a0c1c26ad800d1a63680191ab6b263724cefcddc1b19b4e850fd231. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM81690695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998c5bc33d5f734d035290eafcc784985b7ac22e3d30edfe54ce526aecded085. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USHM81690697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0716e8033c003fe9333e96e61845324eb1d436495cfa54b8e6c90aaa592804. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM81690701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2ecd9b3f6c38efe8bac928855e97b3cf44804a6de919b45f102c33b287130. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM81691649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1270528dd7cbcf4f938cf3b81e05be6de774e40140747fb1a1e404e9c08f8d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM81691650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d52b4c64bca64731b4878d46fb47b2fadb6c03ceeb8d964591b6eb73160db. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:14Z), 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/USHM81691651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd06f537e8dc618b0ebbf32bb66d108fa1c244a6ec4755d225fa61db09118602. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM81691652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8ecfdae6b5e5df0eb92004c7c7bc41d436a7300dac1de8f582dbbaca524693. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USHM81691653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601a45804d5d0bc64a4651b5f3b0aabefc77aeaa3152f3ee3e96a35c2d2b224d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:05Z), 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/USHM81691654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a829530ccee917b9f854863886695fd0a5446d8a39b7afeca4b75d7a3a6568. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM81691656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880e0d872147db9d14653dca1d0580f64b72c7ae4f2d84f36d7f261f84c18783. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM81691657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9752c7ff9e468154937c66dd2b8ea24cfc97b425102c4e011bbc18b3331ad08b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81691658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c31aa8cc0acbfe58b8763c4409124b9fb5b8e77d05fba2f564832333be7ca9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM81691659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359bf45c373cedb951b28d2da9a075e4014f66db5a7f749300ae9873d062bb9c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:34Z), 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/USHM81690680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb74e7414f1cac8882e020bbca69b38615b2d77e6255ed59c9021243e3d4b993. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:40Z), 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/USHM81690682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4af2e674e37ede3ac26586481f73595d9c2820240f51d1c74e1939e41f5e871. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:45Z), 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/USHM81690683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de0ad85f9fcdb4a261104c5e810cdfdfb5e7dd3cf2e67f6df3ace147509449c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:08Z), 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/USHM81690684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d0872891b34232ad5904e3087278d3532ad230a44e78f46a959f0c04fcbfd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:10:44Z), 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/USHM81690685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8673b83efa92b9a961b8d0395cac22b9ebb9fc001cb9c1c7904cbb2ee548d418. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81690686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f3a784272fbd27e6f6a9e3a592cded27348dfd7ff9d7dea4c7a108d6e10b56. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM81690687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d3fb4495150a346af9df4e26e0eb88b8f70580eb0a65646fb7a54a268375d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81690688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48928eaae1a86d608bf4e717171ebac905e524ebc8f32c050d599565e3a83b92. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USHM81690689.