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 0x616ad9ed7e4aa9cea1ded4cabed8d18da881ed1cf6dd5fc0eed52539e8b6d2a4. 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/5091bc46-1070-4ffb-8388-96839791a414.json and https://artists.proofprofile.net/proofs/artist/5091bc46-1070-4ffb-8388-96839791a414.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 0x035591d8b8e9b7d111aee1ddcb6a3aa267fe3e5c39f9e4809f18d47e343191e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ72439683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3269315971fd42524a093a52ee131f54cd4aafc550605e11bd5b129494c5fa19. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:42Z), 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/QZNWY2424711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d2ed48f4e4c58deca8507236b3757859b46ed1f6a2a89fa5f91f03e4a39f4a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWY2424712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7897bae6978e7440c8610df11c2bd29c5739a1b0fc95735dac33a80dc40b3fff. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAW2449764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd396c7d5f4938239e0e6d4201f433018344881e7e734a1818f011a4e6114dd7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB32437041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ef9e4f9085878aebfe9174ad78a229991c4c2fd8e81fdc9f6147f21093de47. 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/QZMEP2538020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf00c30d8930329bae00c1d7ef196b961767c379d116efac685501e61451a83. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:24Z), 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/QZNWX2570728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2150e28b4362979c790a4ed01107a804760016cc57dc4dd9176ff84221453d3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWX2570730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6955381bcfd909e9f8d467c0ad000b3bb3907abb616f0902e8e8016b2be1b1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFM2557955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08700803e37968ebba51bc03a138b9a78503cae6368a5d6c9a30fb1e164174be. 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/QZWFM2557956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0e1a55d82cae63b95fa5ba5897e3087af67658a9926416d3a43a8437095db1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFM2557957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4417607eb454767ef3b92a33b9d377075da0f77b86939e037239a5cd69952c28. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:53Z), 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/QZWFM2557959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce473431fd91a6418adf3beb4e35be2b6853f8ce200b719248f71d86bb0c7cdc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFM2557960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d4a380126df2fa4507b5c4651256d3c32d9faa5b12bfa1bf60110b1eaded42. 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/QZNWU2471257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7f07664bbd117dbf76b2d56a029ab51d65f6544518a4748577adce6f7716a. 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/QZWFG2323739.