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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa51d50830a10c6a6089f359dbfba2d497826c60f7b9fe702ffcb3b21b15563. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99d9d799-07f8-48c0-995e-6ca832934ac6.json and https://artists.proofprofile.net/proofs/artist/99d9d799-07f8-48c0-995e-6ca832934ac6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601a74fc84037e0983b5e7fa1ee9a54b75eba1a7ca8ac4214439fbffd9902241. 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/TCAHX2445881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741870f804f1545ee0d4f7223ec813089346df17c2fb5c1417879c96f29da9bb. 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/QZWFK2382806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb682713e5614d0dfc9c68df65c11d248b5333e6fe37c7349e9acb874aef7e. 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/USA2P2137864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfdec1a5ab33a84ff85544d1ff411c880c2b2f4f43854c473f20824570e14e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2122215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee3b285aca6c9a6d9abfd2d5b01fc7a1f371b817675fd95d78bb8e618f71ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2105854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a7df1664b2b8ee2bb3f3e7d70379e26bcb46248f5c128d30af4c466689c7c5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG2067459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87794adb6ee0beeb8491add94fa07623255d314797f9957941896a5ef9fbc0cf. 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/QZHZ51931537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8780013ba2fc44eb0ce3847fe73a9b0d69de977446342d0fa70a2f2e7e5ca7f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM1941200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17780d7df0b2cf34fd832d59eaf1279ada0a12c0bc8adf6ddb60bc65675b6d2b. 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/QM6N21966369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3496891aa9aace5c71c4b8100fd9330330fb3c228154a5b00abf3a513a0f469. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5FN1956626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe64af7007bc7ebfdf75bccbdc758ba5d546bdb4b3c8539a70d8d84d89ade7b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM7281833542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c950bc8f213147f783d208bf3cbd8b21feae464e70457d80cbf591fd11fe94f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMEU31405425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5384ce6819cdb26be6a1b061945ee82816041ff2ee7975a525ad1250e8adfc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMEU31405431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec1972a1e5aaf71166a85a5dbf06da295cc9f535f4144dc995541cb5381b270. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEQ2007559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bff1089253678aaba1337441e22bba3df4d62143c00ef7ee8d34ff7d08384d. 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/QMEU31405437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5378cb62a95ae33474530d3f528f72e9973aaf81c34e907b9658025e4f1b0. 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/TCAEQ2019548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2671ccc057a766319de84e543eb9dad06482e8c584594b581746e82b25c19c. 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/QMEU31405429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47259f2cd20bc24a09748e403b8a5efd08a549b90b33988b4728b7bf19c040f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEQ2019586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f8020eb3b3ecb2abcf640088fec51e5afe85b82d5314fc27846aba059818e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEQ2019611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39c7d4069ae9c051bc479f787e26af62035547faa67f3b20b6935865c44f31e. 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/TCAIO2463833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f37c5f1d1be6ebf8d9495f6f91059bf24297ea8eaa6f930017df46ae892bf9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZYFZ2464398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77e7206bc6556f9a7365d6a53abdc2775293f6aceaa5a5b37c64dbb1d2db789. 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/TCAGP2239717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c7a44a1e56d839ec30e88e60f8ca4fe1cd53416564179903de0440e3b43302. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUGBT2463373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c5e420e1296ea96b6cd9d6e78d3170eef3165218863c77087b1cb56e60e05. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/AUGBT2463372.
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 0xecacf98ebad60e4c001d8ed40ce8e46a02e549ee50c87315f6d115bd846d8b54. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUGBT2448942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97c54cc4d9bc3222ecacd985ceb3238017e1a138596367069796002cc72a2da. 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/AUGBT2448959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fab05f73825e26acd1aef68fd6fb9cec3950ed28f517840b6ed7ff4c1b66e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUGBT2448961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d5a16a5ca5ba6762fe82baa3d1dc9d19b44536563d6ef4dca97ffdc76bb58. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AUGBT2448954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc780a4e9a581a1ac54168db89d3aa6582e49d7c7483927188524d9e4db10938e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AUGBT2448955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608340615e832e034150353cffa1bdd4466792b060bd5da02e1259ffa97f67b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUGBT2448960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9523d5b5db84280f7a23745b74c1e2180203d0052805e6ed0cab5945a627c676. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/AUGBT2448962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a9d5749de7701d8ec08cbcec4b93fa52016f6e46ec8d39fce18aee7a4d064. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUGBT2448963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32616e05d99eb00b57c4d828747356f58ca3690ca3202adb78679431be076647. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6542297805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6843e456e7b7f38d5a373ecb5ea02e9f3e5dd11af91a37e96c2e1f41018b858. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWZ2197700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b712a6fccd7bd5285b203b803910893eaff7706e325cc6ddb6f64e358473f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882551668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1d0b4a674bf95116725f67461b3294ef383ce464023ef3fc9abd57e1995bf1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUGBT2483966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7ef62969a0da1f45b1275f3a9e4fb734f4d1636c6da92637365749f344f33. 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/USWL12300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680159a2ed66f4e0a906c1bbb1e3951817cc13e300492824b207ad1db190bff. 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/USASN1302298.