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 0x201e1f7a6d5326b4aec0aba08f5566e46bb891993a7ab7665e730f80bc190d82. 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/c2d032a3-aa78-4046-bba8-90b09400daa0.json and https://artists.proofprofile.net/proofs/artist/c2d032a3-aa78-4046-bba8-90b09400daa0.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 0x68b4294aa6364241d707f3716c98b2f5a46b49bc35ac3f1aac21cad9afbc645e. 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/USCGH1482649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4b6ee21ce07863557d84673cf0ab10c92a7ec9a44128f1bffe7acc4266837f. 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/USCGH1482655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7424cd8509fd914bdb40ff715083377e0ec43c1db36e4c0018332e35579689bf. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USCGH1482656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce233eb881267c2f3a4fbfacfc873aa9271e06d763bb46ed258056907ac6b9b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USCGH1482657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eeffd0f646cd4aecd6664a13a4b0de6c73d160710116c36a9652ac3260cf3e. 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/USCGH1482659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fef45dbd3fc896be4ba4131cc2a3d7ecc287abc672cd1ce5e93e3104a767bdd. 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/USCGH1482661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6751c251d3c02f181d752b56b387a0b0916779f9ea23a936ff85b862e8e1545. 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/USCGJ1652797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4563f2cdec46de70c1bcaaf89a472c2785b44322041204ec7f02fb9538fe6c. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USCGJ1652799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1af75f3765b604e5a99dd896683b581e01e297001548b5a76a05dcc4f4894. 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/USCGJ1652801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb92eeab33875f731d68c7f7d8e9b1bffa64f32221d4c6d3a2e9a73e592aca3. 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/USCGJ1652803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367f3f8dca1f9907bdfaa273dbdea345743fc3007557a817eb9364e1e578ad9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:36Z), 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/USCGJ1652804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf48f5f02141fd461b8d44e6a001960d9963913f72b133b03775f93d804e787a. 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/USCGJ1652806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c97e9c99ebdc0622e63d1cb0b305505f974070df7af9761db2b0705c9e8cd3e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:22:40Z), 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/USCGJ1652807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6206dbd38fe3dbdb4a86a6e0d9a9bd2e75deb55a56778f947c364f0b67cbfe0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USCGJ1652809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948c2facb1d236218f63f3d754b1c1711c3a3f81a6f2faa09cbde32f3ace8072. 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/PT4HM2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734508d9c9caef285e49cc09eb97d839a4b81568807bb17c72edae88470e571. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:14:48Z), 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/PT4HM2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d84e3c134da02e65c213ad8296ca9ad34e5c236e97017a1a26522f77dfa249a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:21:24Z), 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/PT4HM2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5500b5aadf35ed559d23ddac0d15adf90ef8d0e38e64fff7f9bdc00a133a6c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PT4HM2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cbd76f3a9f7396982ccb096ea79217b4c6d32679bea32027d403b6402a0995. 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/PT4HM2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3be0e9ae4ff408f6f2c15373b9ba417459afaec24ca9982fb6957540d621168. 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/USV351497446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09801363d2bf70f42fde6889afabee8542ec8b7145550ff048564bd022ba8887. 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/USV351497456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1fa63d2031b4a4d75a8692be1251cc94e50ee0e69d398657db2d751052cb02. 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/PT41M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d20af60da5a93c87aff65e0f3b7f7a087e630d35535c7b8441d273f2ebe393. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/PT41M2400022.