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 0x21dd732b9b83517d6195787514d7e136907959651e7126dc32850e7d4840bbfa. 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/9f824588-8ff6-4c36-8314-bb19ab25c50c.json and https://artists.proofprofile.net/proofs/artist/9f824588-8ff6-4c36-8314-bb19ab25c50c.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 0xddb3031d781420fc82a098e387a0eb45f6936f6c6135cf5848ac2a5e1d48a938. 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/SE5BU2401596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f764d486ed1df3404250437c1d6d8d61f2604f6f92cd5c9a252a7801be597c. 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/NL2QC2101318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcbd72fdee4c649cefa7be3112d3d014a1cfd4778798e91a14705609743d7e2. 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/SE6XY2387667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55376245b5b808bf9dd7fd6e08f491ec9d2219d629917a5ff62c2683a332d29a. 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/SE6A92327837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5f05676e2a4ee07bd940b165f5442c73287f432118c47c7d289af3bc469fdf. 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/NLYK92300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fafd6f3e232e493eb3a5b30d968d52611f1cfc5a75344ce93e0eda4482fc6d. 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/NL2QC2101125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85fbe7e92ba170f445f0939c20077398c20b58e92134dfbae3e6bac19f0bb9f. 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/GX8LD2317021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5add36b78ff04e5633c475df121c852082a13f24d9fc25b51736aae9ce13fb67. 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/NLE712200812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb681f85d48377ced6f0c52e79b1f7f7fddd9fa2c7809acb2f37091a144d1c4. 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/NLT2H2200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49119c6a426c89af38e9afc1e7862b7397b88c3cb977d8dee8a4813676467b0e. 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/NL2QC2100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5468af8febc11ee034ac7a3a68781bba2b98e5447a434a64f959b8ff612f45fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL2QC2100488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ef97434f2f37fb46406133812990eea5f4d1ca5d96781ccd70af0ba5d00f59. 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/NLE712200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e917848bfe040a9a08fded4b03c6e58037ad1885ee2d99510828bcfc4b3771e. 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/NLE712100768.