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 0x4bca84dbe5f38d93af6983661efed0f43a2da8966f200e0ca39bff2bf7a5d803. 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/ac184504-b5b0-44a0-bc4c-2bd3059add67.json and https://artists.proofprofile.net/proofs/artist/ac184504-b5b0-44a0-bc4c-2bd3059add67.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 0xf0128a373a3863591cafd97a080cd3fa7717525002e3e00a46156979ca93be7a. 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/QM4TW2133039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3382656b12cee4f9989146b70d86aa3460493ca697cdcc78871eefa81843e77e. 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/QM4TW2133058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0958008b5b6d61106258877499afb5c4a0bc35f9b0f03c7630b5c19932f725. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMF2034637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0958008b5b6d61106258877499afb5c4a0bc35f9b0f03c7630b5c19932f725. 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/QMFMF2034637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c3afe8f9de2fc255aadf1b0d9cbc798d6ff66bbb794e1c4790ff04608aba7f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM6MZ2119664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d74d2685e8a9ee004d06d0a3666b58eedd6acaf2b896ced7a144924a83e137. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2225342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80453a5801198809ba1a6a6efbe4972ce23cfdf18fce1e171e21e413a3ae57c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NL4WT2200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb011c9f03ce3057938cdb0978b61c25854c2b0d19272dd03451f7097fd25f362. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6N62201173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40f4cf6c4b64fda32dea69782708fdbaf5e59a1fd9778de18afd18cca81f079. 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/NL4WT2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca78b650b86320bff4fa8bcc621bc2c250bed6672a97cdfe83100ee68773a6ff. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SE6N62202090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e67caf5b315d00d56b812fc15a587dd75edffeaf3db020fc769d90a04f85f6. 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/NL4WT2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2ab4a2d7444474e6208321587116fc658208bd058f36b357e3c0cf50d1482d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DGA0P2375002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03a62d759808f88274dd52d013ebd1013dd62dce9adbd24132da43f163ed235. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6N62208572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d573cab7b41d84389ac7386b5cda95482ad6dbca8f6833b7a6b4ba3acb1bb9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE6N62209096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d070a637c058541f9b1d2f2129be5394da2ff98ef9d867d5dc8150c084612f1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:57Z), 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/SE6N62209416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfba0b730b1db10da7101e86223c5f1de7fc62b3689e7d76240b64df0c4078c8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/SE6N62215777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d994005f03bb2e5c808cdc0a35ff5c77d785c5c9db7eb5c72f6c75db9de51. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:31Z), 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/SE6N62216362.