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 0x87c7b672fbd857875dc935da2c6c2943f2c9787a72a881015f56d896eaac9222. 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/7f15cc8c-2f1e-45d9-9cd0-e50b70e0ac42.json and https://artists.proofprofile.net/proofs/artist/7f15cc8c-2f1e-45d9-9cd0-e50b70e0ac42.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 0x87b2b5a715517828674715445724cb154d1fdc835fd66846544a600cf94a76ae. 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/USY280736371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb14608b0794be074e9071fab27391cd6af65bcd468fc143db51582b292a0aac. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USY280736372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed4efa83fd18e410950b9be00c1ff086e61bc93f9b49aae76fadad59e62719d. 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/USY280736373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9284c39d6104a5745127694e87b7655c6e4c14fccb9805c7de683b8d14e3b35a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USY280736374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3393a8b6043ba5bfc415eb95614646718c86918fa9beade42a5edeaafbe5c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USY280736375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de11998987e1cc3733c83a894928a13827c289a9cd6a5f416e065bf84875f02. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USY280736376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd13acb54c102768770978ed274e7af87fd8016a92142acf2d51545ca6873cd. 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/USY280736377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0aed717dae239204618d666eaadb02a753cfe0b30cfcc5637acc3f745e19f4. 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/USY280736378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191acf22c8d185b2628dd5130d135ec5bff53bef17aa0b78607a70757bd2bf0d. 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/USY280736379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8df9501574d96810591a93812b1c26377816d59469e98191ad75fdad55c4c25. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USY280736380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470f08fa77ad02184eb98f3f3a638f5d5f0009e87f266a6e284a7337cf051f14. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USY280736381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc88d2a3781837a2c52483e8d214f453ac37d5a7ebef8aa87f51daa9269a1ec. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USY280736382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf830760ae16418dda6bd6690b5b00a39998ef7aaa7d35056ed49cffca5bf0b. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USY280736383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb724ea2eec96a465cc55265a2c0460bea579a1ea4797efd704139445073a77f. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USY280736384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c62b0a495c5f22b1cc8769db88de6821761cba77cbf69ea90ed0f1955fd675. 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/USY280736385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5e47c616364ed3692a5d3b28b8700a7103e96944caeb12228a532ec8b5385. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USCGH1752340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68906708f9fe898ce5d0176be68fd8cb20ad51ccfc69f0db1bfc8da1a9afc83. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/USCGH1760490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e7ee19c0c2d3809ab48d326a2db94107e152ff41a2aa51218bea101fb97f1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH1760491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b6b4d1bd0bd64c1980f56f496a10b67de14818fc50993e354fc0564cad06f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USCGH1760492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ede68ababb698390dfdf9f0e85a820e3ff11b0a3dbd3389751252c37e043f. 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/USCGH1760493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635b55afabb3f62dbb641c30c10c46e731bb9fc2796a1a943dc2418f042b065. 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/USCGH1760494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fc77c2adff2e45c5604d8247f0687abc9f13bf31e27a1e98b7d6e2774606f8. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USCGH1760495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fd91997a41110716902852961eaee7d9a2363afaeb3c0e591a61ab6ada291b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USCGH1760496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e6efc232f2fa99d6c777e4f5cc5323b9489023dd34754d97db24cef803b7b2. 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/USCGH1760497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406ba2c6f2bf6af8fd593a7164049116f9f352fc9f2d87ad8790e71249f5e21. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGH1760498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc325a8ed32c898c678f7d6992b3af9e3c7b4670b3d9d030f4b9c9de259ff2d7e. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USCGH1760499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8ac69c23872db8134965df4913c511e931b0cd889d609ce6934d8c1d55b4a7. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USCGH2599658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba8754c87ca10cd04dfa0c4512f16946e5d5de8ad0108a1d70fcefc58b7b6eb. 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/USCGH2599659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c4ad2665da2dd83f5b0d2eef312fe642c08493743f876ac0fb3d885a0705b8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USCGH2599660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b34acbab6f767ca9e2178eae6fe20a514d723bdd1635ceb9ac52a82372abb2. 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/USCGH2599661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a6aae1320b61d3de791eddcb23f8f5f8408bd7f0f290eed190109bd7ab965f. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USCGH2599662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482881c79ef52e95ab224024e853e8934cf3659c7ad4dcc395d91fa71bc806a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USCGH2599663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71a82b313903a47f91198fca192f097afce19dde1753bc7a30dd4909313da5c. 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/USCGH2599664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3576e73775fe24891d73ad62291bceb9f62a3011986bc9d5cae91ef9751938. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USCGH2599665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcb5d7df6071e2627342a9b28b2bf275db29d720e8838adbda8ef401e81287e. 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/USCGH2599666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792a9d4cefb70a43c6941898910adfdcad85d9292509922e6a13e67dc974e352. 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/USCGH2599667.