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 0x23346b9da0b71950871bb4c99704cdcc788e907a56588ad0e5e2b3af4bd87d87. 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/b09dba84-359f-40b3-b5b8-ce67836a51c7.json and https://artists.proofprofile.net/proofs/artist/b09dba84-359f-40b3-b5b8-ce67836a51c7.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 0x101e5635244b914ba74bf58ad8eead4babc12809f0bdfcbf06a8e262b59aaa5b. 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/FRZ114404884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7eaa374279678a4c418262051e34f7030c7edb9cc8206afb009e9a035cd74f. 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/FRZ113700450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee0cb6da6906fd5acb6689d136ae118ab35d3d012eeeb3655e920c878591ef. 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/FRZ113904870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687d547ccbd667078d3156391c741e159338193dc6bee189f0ad6cf30fcd8a99. 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/FRZ114000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae6c2868979f8ab37db6a2cccc340c61bfe39e38665a7403589b33bbcb72ed. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRZ114100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3331825902ff2a159a9b79016d69088cf0bf15a2e422ee0a5e453e8aa928eb02. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRZ114100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83493485b8ecfc7d5ed8356937a9d2f700d1bddcfab28924293e67ee8ae5434c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ114300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ac6fbc7946a5c229b3af1cc9ceb49fd30288daffc38d19e61ea8a9884357e8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ114300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dedf98de301aae06491401b0f46e62dad573bac6d9d658d6576201f23c4820d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRZ113807269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e35eb1bf074b62d222a5e4275ec16632463aaf80e372b28ccf46d8e0a6e8fe. 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/FRZ114011739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc780a05357a5fb380ba70f608082bbd7c300b6ae5a47e665d327c9cb9d396797. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ113700470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07e4f655acbf9f3403138770a9ced3f61879f526a09e866bd480bf89f3c8c53. 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/FRZ113807194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c274ef27b8cf6f6b97569563efb42f40c007cf49c85ea88438f4e64e3771790. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ114107276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14ee4123b86ea8db26fdd643edf4822445511abec1cea99b3629887444ba3fd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ113807268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b077abe856b6c4dce2483faeb006ba6a845b5fce59e152c57878e94ae98597. 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/FRZ113800570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f82c52592ce68c5b54bcbd925ce4bebb6af10c827008d50d8b8da45bf4300c8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ113807193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab867bbeec0e104f27150fa52889b8b02820b8ec4099a259b1265eddb251ebe1. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/FRZ115407490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcdaf585f4f32c56643cc375521580478566a12e406f7ee3b66f2322f170338. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ113900450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e5b3412f16d884e020ffd7d79d1f0e579ef617396d8299c8529fa3793f5ebb. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRZ115507268.