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 0xbb84a5355035055097bcde72e0abb8afe01daee4d3167cb9c8f52de0c3dbdad2. 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/344a64fc-8ffa-4155-9c03-0f4e1552e046.json and https://artists.proofprofile.net/proofs/artist/344a64fc-8ffa-4155-9c03-0f4e1552e046.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 0x94f64d6a907946667d97194b903b8eee9ea127d2c9c688c80a6590d3ae24c413. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEXM82000809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c656590d72bc79ddd92be1ce5de9e389d5bf81ac7be07f19f3e6145fef25516. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEXM82000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c4b4c0791af4758755ff14df705903d5b8ce031843ed9e5253ca3e6d40a512. 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/DEXM82000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f9305d552e403c5c0ca935b810ec161de4f547979b41f652985b2ad2612b99. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEXM82104058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad1dc0968d999e801def5c49d67a76ecd3a26e16a103a9ba25c58a253f48d7c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEXM82104083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb050d37276bbf2a8c4130b8ff24b3fd029511805b66799b9a086103ddec296ca. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEXM82104109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739497b32344eb0ede89b41ec7aebfde8ecafd283029f95e0ea141912872bbaa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEXM82104110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a91d5df65be1edb385e98b0ddf902380bf615a177df35c5370e5c11845f811d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEXM82104112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd386a904ebf6891feeb20b89840f074241bef0a9ef8913a5ffc2aaf8bf1ef. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEXM82104067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc32240370929e8354afd38845372cf25adbf279a1464a03ea698b4c7b80d5a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXM82104076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbebfa5170129c6f3064d2b0e04db904a89daba5a8ce91551c1be57adc061b4b. 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/DEXM82002234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e95a075c867603b8558f4d1b8a8f812e3013e66a16ac9498086c2df7e91bff. 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/QM3DF2114763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd12e9240a2802b40764434753a2488635b8fdaae56047316382fbecfdb6525. 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/DE1KS2300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb114385f2a8ac52253e276ad17dbb8b48e411e28a8208d71d14bbbcab0dda. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:48Z), 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/DE1KS2504473.