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 0x251861c4fa1232a08ebbdbe15fbad2c44737fd384542040af796ceded50f14c3. 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/fcfc912c-b50b-4f4c-87b5-32101017e8fe.json and https://artists.proofprofile.net/proofs/artist/fcfc912c-b50b-4f4c-87b5-32101017e8fe.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 0x7a3e9989de41a8ec4affa097f71ea18016f40112d35b9d7ec4772ad589c4a1e3. 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/DGA0T2409855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aba42e8a4493049f4c638f691835468e681ebd2ef58ab1b97c09816d2cbd09. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:31:40Z), 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/DGA0T2409856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791ab31349cdd5556b025197713e69703e58d59663fc8acdefc59a6a3c007be. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0T2409858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f73301136a5192be20a65e59685cdaf9e75d6f35b7065d43a7ebdb85ecdd3c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DGA0T2409861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56f93c58ebe9df0330e85a119cf169069667aa1f4af0f2877c691cfef7069b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUA1D2508817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401d05d46b4beedb449fbc3e29fd0f781332bcf2514a360cf0b6065bf1053599. 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/RUA1D2535743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec706975d3fd0f9b7cde066c9979963d2ec9c0cead68f58a616dcd610ce4ef81. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA1D2572812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1b156a1e4bd980244aa25a07eb429c6713cdce963ba7cd76cfb8b1871d7084. 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/RUA1D2572813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee88914607009f5f90e08ffcfa5ad3ce48389461520095e636f9d9ea8a8f856. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:05Z), 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/RUA1D2572814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39d9d68565cc8ba61188349528f28e7994b69b385fc8b276225aa629c12dc45. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX282591397.