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 0x292ade51eab55043c17e62d5c23e402d4f324fe9a3d3170ece9c10cb90148f5d. 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/404910d6-f21f-406d-84ca-84a720be3b1a.json and https://artists.proofprofile.net/proofs/artist/404910d6-f21f-406d-84ca-84a720be3b1a.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 0xdfd971f8c8705ed7bc61e9fd62ad6afdb2d1cf98e0e0c125420835cf37550763. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB32230156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525a1fbef8602d8ef49a133cf02483699faec7838dc7922a6137167e904c5f53. 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/QZNWS2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49bdbef9fedb2a21c4af73e532ced6acdd7383f424c0b85602d43da71ee17ec. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZAKB2460194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4c724d0eb138557dc22d2720b359d01863f06cbf23296f3a8a75f5e61ef0c. 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/QZAKB2460196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ae5c3af5244bef8e96957cf7900afa43c9db1a552ce7fcbac9cc2c2a0a30c. 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/QZAKB2460197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9394f3f1e81efe1e1a9892de0a894af02def9192faa03d719e81fead81e06d0c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:22Z), 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/QZAKB2460198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f11fedd801bffc5d482fb0d80f1849ab2ed7c545c6ac0aab251e9907d9e77a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZES52506967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef147ecbe93215b15e059edd2d0d7db313c52070f5ef166937c323c9e77fb7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZAKB2460200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11944112587b9c9105a8bb5399070cbfc91d0f8774be20a8916af9601c8d49b2. 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/QZAKB2460201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093fb4620ff7533a388b4cbcb3ca97b5fca3b37f4d270eb4db01e83226692392. 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/QZAKB2460202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0425a025fb956b606f0e7dc821deac8810e72f6d0802b26ad2f40492bf84835. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/QZAKB2460203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf0d4efa8578cc7c19546977e41f6e211f31100f8e9016b19ee9f2e88175fa6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:34Z), 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/QZAKB2460204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cb6c16fe1618752358f704c28f856bfef368e82e25be89b49502cf451f2076. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZAKB2460205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5911ad6768a92a854dd5d1a002b8c6ee9c33f66c3ab411e1edb5aeec2683cf. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:36Z), 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/CH7812547883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1228ba0d4d15b09adb23556231176a83ca918b09e22a50edc5a49d510545056d. 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/QZWFU2460112.