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 0xc7d9937d5253d22af4bc059aa9b8dc50f585d88546f80c9ef98b37da059e482f. 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/75fd6c68-96f9-45d4-a599-2ad84da114e4.json and https://artists.proofprofile.net/proofs/artist/75fd6c68-96f9-45d4-a599-2ad84da114e4.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 0xa30c0151dd994b1635e1601c5ab4d9441acc85e1c26025966976f5459a9d0bb1. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ITDF62077051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab60bd3201cfa6c76510fa9fbf47d27e5ab481d81d525f11ade530fc5397a0e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:00:48Z), 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/TCAFM2150566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2d3f0132fac09f4d9c659d28832aa7609b516d296bde5ff8374a5cbfd1e0ed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFM2150574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0845dfcce3c9aab70abec0ba8d05259ca2cae95058362ee03890f8a684adc6b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAFM2150578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6c411d789380af748f5b176653a54c18a2291abcd12053c4891a7fbb8845d7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAFM2177824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd399711a29dfde23594356f3311640de825ca0d53d94413069d1af56b7c90050. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:59:11Z), 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/TCAGE2248332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb429d272d7a933f0362321cf62edf16acf46738753e0ab768222491628668ee4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAGG2212612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878232dcf3c32bfa1fa5d3794b3d8d1673ad54a505e9327aafe390ca9ca89106. 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/TCAGI2282900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b91620534cc6a61fcc3a8544ffbc67d8d3196c69b64825c7238e49e64a01b2. 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/TCAGY2373832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3d08c4970da79748aa918b105a0e659f911c16cb407924cdc157caa151f71. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6G2328649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7776e1364651e2499f10f4209eee42d4c8d75dbc3f0470a36d432769b02d10d8. 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/ITQ002401351.