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 0x2d50349e9d7b160a31283cea85baeb6c4c87275862aa1d37e4e73859ea342175. 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/0b1b03e4-29be-432f-b882-51b68cd736e5.json and https://artists.proofprofile.net/proofs/artist/0b1b03e4-29be-432f-b882-51b68cd736e5.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 0x3bd72ae8ebb825e22b9654030d8c67c9b7fabc170b7cbded52f4b9570940c972. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6G2314673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb09b648e403adf16a3a9ed70947c5d961c99d0bc3792f81b6e6953bd76118ce. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAW2265859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8833c00e4b5182de8414c62288c2c8e096e7d71cfc936cdfd6b73722262bb882. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZK6L2302440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0221381b2b7d3e8b746929a6c637429eb347ca980298e466609a929249cdc2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZK6G2314675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c9b96c9f48205e66788e9c4d30b09857a3d4fd00f67394db3a51bee4cbb60a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAU2366834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c37feace1f8057ef401ba438bc13f0c23e47ac6daf92a8fde792b47e23d74. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTAU2366836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d03dc691fe6c7d1bc867a0def798d7e7cf71ff8fabcda9876c67150bc46771. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZTB52385931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96971719192dce9d313ada69982b77d75087bba5046e5974a601f00e13ccc9af. 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/QZNWX2379551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fb4afb83c5029f3bb13dc3cc5995ed60967fad7bc22287eeef6cf043d9ef88. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZQAY2417061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ff1ebe52268820d16edfdccfe13bd14a7f7c9af2ece96e4c0ac6a14d53d47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZQAY2435267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6a73cab7fad172fc32102f23b2d274f1f768874cb818a2ce4d7368c5bae25. 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/QZQAY2484650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f98cc255dbbe76c75d7ded7af6aa91df30448d1415f1427032f8f28027df9c9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZQAY2436278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefc6170effcd5d7db0fe26ea20094657331924717b4f49980e059a1c96c440e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZQAY2431095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bad2f703b20d9b5cdb9e1a7d2cf8146082fc0abe20f86f9292dc3c7e7c9356. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS7J2535948.
A Tale Quite Grim (Sped Up and Slowed Down)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad5faceb5acf610c6f3b6023a93dc65f83d5aec0bcc347bef327c6046c767a. 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/QZWDE2482731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4e5f1b18f8beef720441cfee4ef0160061a697097fbdb646c428902c0d1e40. 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/QZWDE2482755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aab3eb6d708e73e7bbc076cd6da45456c0d00228ce90e26bb9be313db1889d8. 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/QZZ8A2357795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63f43d41c4bf7e477b7b6251b6f4c7256590221f0a1dd12bdfa9f9b6eecd4ff. 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/QZS7J2331279.