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 0xeecefd87a5b2d215ddb6b9fb7235b56b16ffad1ca8ec44bab897b8f6ab927e41. 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/2ecb0c8d-a761-47e5-9ab5-1ef9ddc0e1c8.json and https://artists.proofprofile.net/proofs/artist/2ecb0c8d-a761-47e5-9ab5-1ef9ddc0e1c8.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 0x51179fbf3da159169a93bb28f5d436adc0bb97d5b63ab519c3ad4b145e3630a7. 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/QZ9Y21765302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aba5faf780d15f9f8d7cea6f883a98ac316a3373396234c82cf5300f165ed1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZ9JZ1729109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf302fb57c5784be42853a744d934e288c200038d8015bd59eae6274a892b72. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ9JZ1729111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb7410f9d6b1307410d3b755d99d67a98b94528947c3dfc8c03e06305fbe3cb. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZ9JZ1729112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cf86e74858d098cdd6c59ddd96391a2019f61bed5996d7467f8565fdc81e32. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZ9JZ1729113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df33c0f81482f8b0e6bec8583d90a12e125e3191a81e87260fa35c4c06c031a. 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/QZ9JZ1729115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63ac3e5f645181cff4006e59cc75fd6f7be31b1e669613b5ff3c45c62ba32c7. 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/QZES52043363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf662257f56b5ea834193f7524fec8e57eadb25fabb6ae08b5877245ae6fb936c. 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/QZK6G2057980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c686979591873c5938f21b56c6ae040a70ebf9ce6936f4af2f1e7b9abf6cc2f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA72480891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1020c7962e0e09b960ce546dda967626488e5b934eb201fc681966970160ff. 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/QZDA72480892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c0363a0dcdcf6fa3cd9efabad312ab7073d43039542406575cb633bd4264c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72480894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979684340dc1257852c2c131ff2cfc3d101ebb19700968175e2f46cbb3c62011. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA72480896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeee80364764291c322f6fac5a33e3079f397b05298339efed75694c8eb933ff. 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/QZDA72480897.
1366 (Old King's Visions Part V) [Live Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90187621c8920cf49cc4fb60227628d91a3724915da63c56ff9776b1276212. 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/DGA0S2416339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598d95c3d68cfd5097705bcaced3a141558a57cb318a7f076581ed7d118e3994. 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/DGA0S2416343.