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 0x8e3a0142fc89a94f1e6b08752ab0c0bdd88d2ce3be868fec1516c450e36d4f16. 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/816a2a15-1081-4b35-8808-ac15ec33334a.json and https://artists.proofprofile.net/proofs/artist/816a2a15-1081-4b35-8808-ac15ec33334a.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 0xb3d637a1ea5a48c1f35a922c2458f36beeef65124372e9cf31d24d0320de8c41. 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/BRUM72201392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b54827a705a54fb04c0ebcd8fcf9c34f23b71d94d1fdbc2b3a3bbb3e6ca012. 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/BEIW12000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd069cf674d630aaf60dcb26eb3dd9a157d174759bec063f318cf4a8b243d10. 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/BXIED2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0cb58327d42a7c5afdfbcb79f6e82793ac06eb8c4338195e58933f4fb6caed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXIED2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb26436c57472ac0dcfca9dda55a53fd236400931b44c68b04dfe2fa9746636d. 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/BXHBP1901129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc7ad81a4e5bd926efb76b80e8e381cdfd599ff194b0fec366220c8edf8b67. 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/BXHBP1901130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2a0e14ed8a6087e29254b40f5b64d281f331a7d5939cee6205cd6d0111b823. 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/BXG9S2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7cf9ee90e1168802cc8b39fc4a0582814fdd52739abbaec50f43e4f6925f59. 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/BRUM72300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c31d24c0463b888c63ff96ed70d1c0c649e887a98157e43a055f5938adf5fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXIED2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae55c01c9cee7d4fd562a186863062e976d9201bf4a4214ca26f58695bbbf3b. 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/BRUM72102475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d6ff7a906a2540db5daae3534edca39af19f70ee84bedd23ca2061d891a563. 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/BEIW12100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81083d309257449e270141a7efed7afc2a4ff36c641a7c2531697e03eda1088. 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/BXIED2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58c0daef3b8e326efcd294b404d1404c61a39121cf034fb788eb8792fbe020d. 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/DEEE72001260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc80a190f9c4b641242e2ab8e1924d55db5e439097ebf581dfa1cf5ae84bd5c. 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/DEEE72001261.
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 0xdf9ccf39092dadb3bc5dc018b19c3ce32c5929507d6dbec32e4b3ca7d336552d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXHBP1900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b1d62868c9f7b4d83ef4f9a32601d94885c0bda9a72833266e954b098990eb. 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/BXHBP1900371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d5de74b9aceed07b19102c6695c30f2707140034774a524461149d9c2fe98. 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/BX0BA1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322da22ddf99e53b44988f5a54c2490930db6c7b199178afa101b7584a998d1d. 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/BX0BA1900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b9c7ee6abcd0fe496a14698ce30b3115e6dd0fe2ffa399de96fca82461ac5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX0BA1900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d543ad125f330a407dc163f106b477213baec224b44a7b8049995b8f2f0739a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLZ541801726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928d2a9e076ee6aac1c89cbd38008140d5921d6712141d906bfa86d99766b500. 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/GBSMU5319062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b5d297e82c6b8dc532d891fe238a91d613e605b0c802b7d02a438a6fcf9db0. 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/TCADH1799198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f030516dc153aed5f361ad96d6655052a39cc0cc0441a2c12a52b0b917ece. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEEE72001248.