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 0x735503f00a4ae6d46c1a46242f4e520e721bec2ba5a62e2b1b7c1dfba86373f2. 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/0a48d1a1-0c71-4a68-8994-bf24ebb1c38c.json and https://artists.proofprofile.net/proofs/artist/0a48d1a1-0c71-4a68-8994-bf24ebb1c38c.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 0x1bd4369996dd0f39376eae114a2acee594dcdbc7f4b43f485fc13c404a46d7a7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6G2487531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2d16b043843fd5c9a91fdd9b9560bcde5c0ef936a9894a505700a7e1c02f95. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6G2487487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0752402e7e2e5df6db27655c2943076677506153c7381483a9e29ddcc50faaf7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZK6F2412863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1628cf1b5dcff1a8e7a6ebb1dcc6056acc8bb6ceff90bdf23a0473295eb50b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTAS2420536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29911a92521e5e16d6ffe23494244bc434a5f93c65f429ea3a4e8b59deceb03. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTAU2425527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3bcdfa4062cf94d965522f5fa575650264165023129f72f0921fba1e976dac. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB42485747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259b1755f1d9764c575aebe2722fc4f81f48fd21dd0245865d690848dc2ebe7f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBB2470131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505877d8b25aab3258577774f2da205aee9a441005607a96bdffb3d377574db1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFM2488328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad5d7bf7dbea21d52fa193a68c96ed6edc579db10fb79d69c154f0c697ed00. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZZ7P2472598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffdab814381dbc776eba0ecd1053d4064e9a0f54931c0fe48da5a23d7efa2ef. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZZ7W2476354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a5604957ff0104df1fc04827a0b0c1aa61e038e4fe2e118809cd88ea8e8751. 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/QZZ7Q2457026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee40fd3a25081fb2a2ca1873511872779b23ce5cc14f3af45e3f5a730209406a. 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/QZNWS2514216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b43241a32247fecefeb70f8c462702d68747843507dc7ae6ecdd962d8539a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2514217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc08f3d2ad144ad96ac5f4ba0d78d99b8fa466a643bbd79cf7c4938c48cb8fe. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWS2514218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e3c6c0cb9f2b726ee3a387640898165167a11501bd8279bd765d7911321412. 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/QZNWS2514219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b812d62db3b0dcbc42446432fe11393da4dd10bbc2ef442be9c33321fe2c6c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWS2514220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffdab814381dbc776eba0ecd1053d4064e9a0f54931c0fe48da5a23d7efa2ef. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZZ7W2476354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9845a28f8caa22e0590266932b231d4ba6059887b35deff6a29d3999207448. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZNWS2514221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84a6355b3aa163c2b8553e2f4fdfe94aec51140b21e82c43541561b7a58ecc4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWS2514222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89709fd6912a8d4466b61ede5b46dd95c5e0935e696fb9f0eb3f3f841eb60bdc. 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/QZNWS2514223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f78345072f04659fe0e41c66e762efdff94d3c4ea596e4c10852419efd18d. 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/QZNWS2514224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c52207078a3a6fb3917524975a576321c7a12750f7f8697f69458f4e891a8. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWS2514225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d88d8cd39ac646735bedbc7a217dd3b187de605efaa9de46ad1ed1c6240f620. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWS2514226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6c581cf059d82eb6007d2aade8f18d30f9b14900149ebceb1fa7cff250c6a1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNWS2514227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399d3762cf0083e5999843d2127b8645e2c4fdbf6ae714de3ac315044ae58b43. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWS2514228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72712c5b40ce994a7bf9c3a3269094268e6609430f4f9f6c84b1cfb1b885724. 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/QZNWS2514229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a122fa40182800dadd0b4cfc9d658745dec2a0fd09b54d45e46cb1c45966a9e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAW2569676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda3946a901709b22c735d8cccafb0341fab6475308b43caab2ae771c0c7b2d7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB32583352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51ff90a15fc697f68a71ab0bf93b28438895312fd86e033e611e8636d808a6. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/QZTB92530212.
this song started in 2018 and never ended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd5c8a71c54aff6370f54ab79efac98940c674c4ecfcade5d76eec356764b71. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7Q2587735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08957f0154e63b286bb4c3b42f84adcea808c969ef5211b519c492da8fe87e79. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7U2575584.