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 0xf38b70d81f99668a5bdbf7c2945827aadab89ac08f32325ff2022f780184a29c. 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/39c1372a-756a-43ef-8fc9-62a7679740d2.json and https://artists.proofprofile.net/proofs/artist/39c1372a-756a-43ef-8fc9-62a7679740d2.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 0x615dd5c67defc06c9b8c884ff9d024f24cfde62528cff16a0ec70a2a72a25e89. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA072366665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7d46d8fbd93c3a29d0389d170813db54f59659c2627f5dc814486920731231. 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/DGA072366666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72046f17f5b8cc0fa8046c7e347cab27994b1af1a36321162c33940b055873f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA072366671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451e4e683957dfbb5ad30b2d891657fb50041f70e9a3f39347c34c5ed24dc49b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DGA072366664.
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 0x58907fef5bec1726e8a0edda4aef5fda9166222ffb6108beda896d1afb2446a9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DGA072366667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b88db65127fd2c2f676c0eb2bebcdc60bf306558a8ba3719f456106efad702. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DGA072366668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408bcacfa1006e6c694dd4cc8123552a56c8d12670f2e0fca3fd6fa1a503cf03. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA072366669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdcf97f0bb5f8dc676358eaa5c37abfe3678edcbc45d1abebebe3a1b01178e2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA072366670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb633343325b9718a23c9d264a8a92c5e77b962ec77cee3e38d116a6346672ad5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DGA072366672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6113248ed0497bb479da5e7f08ed0d38aadae6d7084117399bd5a2b464296d2a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762400752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b1cb9d78e4cfcb574b92c74d527eb7fde8c00c60c5a8fe0728f6c6bcfef77a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX762400753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2c27f6785bae50caffe5feae666ea3b0bbbe9e1eb63138d16145fab4736be2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX872462971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55171f9c5b99dc705b94a4f5f32c57061feb4feb42170cb96fe5fe1395c949e7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX872462972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1cbb47e7aad3584339453d3483e08c8ed4d150b5dc6c8d34f19658671358c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ972479904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560be77b2020e9e9056e2ffd965491161147a39ece72eb7e2fc05ec8e0dc4989. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA082310596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca47afa3d7d80bd09edadb4b984abce429badd14d00b89b934bc0518bf0e0c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA082310507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90361360fb4caea5f7734a826cfbd1f8469ff6aa1977b7750ad9c3bf92f7faa6. 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/DGA082306434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0835c375be98c03260b2cf1893cdd84dfa4bd0d223dd307a2cfc21b27772247. 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/QM4TX2025842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd720ee5985c228ba3b140e2fa689536bfff9e59d20a9d84931ad8cb147a7c4ad. 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/QZZ972479905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf378b66bd9a54eefbcbe9fb586889a14ee51ebce58aaa522207e9353482dbde1. 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/FR10S2360452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949a74da48b80521782ff034eab01fe06305d21881fada9ca8d0c5128fd15062. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:30:32Z), 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/FRX762290012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb63322c3591a4d740e185309906d6e4bfa166271f9598fe7f264851328c61a. 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/FRX762290013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11a1cb8f90b5026d8d597b5f3e59e671c20e8fbc90d91d82997a8f1507de42d. 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/FRX282165351.