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 0x94553801087265e3f40e8f325ddc0cb52797e24011fd4d905d2cb9f0200eb2b7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e733c11-68f8-43c3-aa66-9c4ff553003a.json and https://artists.proofprofile.net/proofs/artist/5e733c11-68f8-43c3-aa66-9c4ff553003a.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 0xbd812c1279c8034cc38d05e29efcc76dcd29ed85543ce2a64c521bf5080f51dd. 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/QZES62188402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b13d171d4edd3823f39c508e26dab1c6c6daae1c21ba0a7d5226760442d44c. 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/QZK6N2261506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd076ffe56f408e132c8786fd17fbadca1eb5ad552854e20c58671f4996cb7de6. 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/QZTAS2209528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efcb4d8ae9b7253fa05f169bb8d3cacf4e9949820a2619cf2cd3f2f6bfb44e5. 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/QZDA52340012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e11734c86cd112c7ca348900b2e03186ae1a3477fe1ee08312ed3557b6e7a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBE2398593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f48e551042684f01c3da054f8f1c999c9bf8b5391494268486190e9eee79bb0. 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/QZWFJ2307400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156f061e6bd4fe47a14dca64a61dcb804801b9487054aabaf8a1de48d5b6b3b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFQ2307163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebfa3e46129364c35ecb8ef62f73451d7fe3fb2af3ab64cb51210ff74b037d1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN52432803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486aff40b3be10111257a0822c6ebe2e1069db09ca15712189ae862c44281d5c. 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/QZTAT2417520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2264cfc59b61f866c7733dc0b737fcfc5742a794c026fcb79cdca3fcf5cd7d. 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/QZTAT2417522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1f206eabfb51083edde76f47ce152502ec8331bf1dc1714dfe2eebfe8ccba7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:00Z), 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/TCAIM2470212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95352515abda66f4e6da48a18f70756670813b1ed69c3e9037f881bbd9063914. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:35Z), 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/FR9W12463138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecbc54833682b90ba9d2852f0dd638486565628aaf8629a884ba9225ffe4dfc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:23:51Z), 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/QZFYZ2566351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb171bf2ddab8daf2bc18f7dc045af92ae57e69f9011607f995b6dd836d25c0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES72576465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc8957a92ca2b2cf19579cb7e491550ddc76a56cdd9432eb4b486dbbf072cf7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBA2548262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba127cafb40cc58193763208ec4b99e1be7d107a285ea8f6a29962eb97ede68. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFQ2578481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766ab1b16cd4465af0881f92fe844453808b67d4abf295ae4f45f1fcfd244e3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:54:47Z), 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/QT3F52510383.