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 0x7118bbca2afc189427c4283786429c3d912c01bb3fbde8d329f33b6785b421d7. 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/cd91a212-ecbe-48dc-9aa5-a1d1c50fb0b8.json and https://artists.proofprofile.net/proofs/artist/cd91a212-ecbe-48dc-9aa5-a1d1c50fb0b8.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 0x0d643f148bed0fbad7a327907f99ad299221d7534e01800d771fcdac5077e44f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:17Z), 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/US83Z2230582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988e7fa8ca6202b54084ff6975dbd6393b3ad9d2cd1fcfdfa94b0cc06916bb93. 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/US83Z2236458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c18a52aaeec85acfb3fc27225f109f9e28ab77094c141545922af9abc6177. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/NLHR22300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904927b3e098d62f2f216b5814238f554ec655673f9f7efac18a0ff12d353774. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2314591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871fb02414222606760fa3dc41822a9c3440e94e55e3120a8c3a1fe2519622a8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/US83Z2330602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7579d0297ecab456619e1dd59152ce7f5040c546daba66ac2c0cc200775265. 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/US83Z2494075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be81308a9db47dc345dd06cbc91b4d070d793fdceffcae05faa0a13ac1ed2ca. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:34Z), 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/US83Z2500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f79648a2a01387e91f8004ff170243fb9f440c28ba5a8948975f043ea5b08a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US83Z2425532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd3e677a53fb3809fc0f5c07155db2fe3ea9d35658487ec476c8d73179294d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/US83Z2506233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b041ff85a3951fd0d2741fd49c83719053c4d0d8ebb6640a159aeef4bd06a37. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:29:19Z), 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/US83Z2425456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5275d0322a890084842f0da7f4db7e733f45ccff9ef6c2a395455fbb929982. 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/US83Z2506193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b4968d972206d40469d481aa4a193b9aee7e9f36bd17cff7276963205df35. 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/US83Z2427185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee7efd8794b54a29f92af9d7420572520f1ad1188f0365de1b523717a3ee0e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US83Z2425561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20428de75a5fae16a67f1eff134dfca3d43377a6fdef267c2b0f437f79c83b6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:01:03Z), 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/US83Z2510233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388b4de1a4d0666aac06805fe610d43b240669929f02714b80b07572fc3866e5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/US83Z2546491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade40011002a9900b21b346c7461bd1dae0b0ff171500ab3c8e1772000f66f9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2506328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b271cbaf37abcebf871d2f04a93ac451d77de13173005fbf118b0a7c67a815. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/US83Z2506897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183387773bd3d08d290775cc553aba839cc9a94ffb7541aa8fec0f9b6cfc86b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US83Z2506761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eecabbec3fb7aca4d7a37d0b214aaa03a495425eb84e28557ca0bed518c555. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US83Z2506296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad276a9f376a99c5b64cbd162a629f84107352b360159d87074b11c254d1cc26. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US83Z2542586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98afe88d42965452518395936a4eaaa9778a17320bc6695d9806b3ca56513831. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US83Z2543784.