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 0xe6c121960bd29437c26ed06f2af90d35e00f12ad5930b8717b55ca4b22f5dd31. 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/3a8a1687-7fe0-4c18-8701-0df2753a1c30.json and https://artists.proofprofile.net/proofs/artist/3a8a1687-7fe0-4c18-8701-0df2753a1c30.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 0x0f28c4c274f280d32fd824ed78fc1fa940c002c0d8f28e9e329a1192e40bbb0e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SE6XY2147499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b910ff12cd1146e5bd6ef7dd841b566b32fd0bb854769cc29dabee2018e2388. 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/SE6I32262004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96160652523c1700af1375249546419e0dc5f321711541f095e468b65adae93. 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/SE6SA2283409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c92692decf5022da3ae721fd98c503b3a19ad558c120e170ab4a4891106e98. 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/SE6SA2283411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18a84c9945eaac4512bdb9d4df7a08b47ed1b45be7cd837c1a042373029d6b5. 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/SE6SA2283412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9bae8365fa0e9de11a6d060695ec30d53207359f5ded908d504956ab83dff5. 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/SE6SA2283413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935a61fab5e511cb9bcf981637a9baaadccacde25c9f0233edb4b0cccd93b318. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/SE6SA2286234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5aba01b92df9c1fc7832b5054455a8c66bc3d196fee8f379e51aebeafd5aa8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE6SA2286296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dec49f704b72c38df9d27344d155a32f4b6bef86de8edfe06189e9e1904cce5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:47Z), 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/SE6HN2303753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bd28e306e9cc441ce6a99917ee0c22b5c86f840a070dba48463ff6761facf1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SE6I32396561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf56a758ac64c4dd7945c9ab05a1a1857477117e992ba94b6b16a9a74528bf0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:02:28Z), 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/SE6SA2353794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24406a084699487ddedeeda3c8228a2b9fb89d91cda4fbee1146741b7ff3193. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:51:27Z), 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/SE6I32405854.