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 0x4000fc153c7b66e73f4d103e9e9e5c9e464bd79186ac13233072706cc6352cb6. 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/35b9645c-6952-4ce4-9177-93c1a2cb8b33.json and https://artists.proofprofile.net/proofs/artist/35b9645c-6952-4ce4-9177-93c1a2cb8b33.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 0x755999b4fa092e7ce2fd01a7284b0f9d69761f649f2f12873dd2baf130035d3b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMVZM9320702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a7ab131e34d8e729b3e970b895ab9ed0c843a9a529e0baae80ee0c095fdb71. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DESR41800178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b21a4d0e24851c9897446d43ff889c1a6c42c593a73e4d02b8b6a57f9bbd4e9. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DESR41800179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43f02ca865df40d0728a2281a650fb495c7ff8da4b6ec986ea5fb6e7f5625cf. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/DESR41800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b02c9f5825471a3d3033ed9faca3304c0c9129d45a3131e47e80138140d904. 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/NLCK41070762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf38ffd5a388e0e1cd63de07bdea3351cf1cfd9506502208d5b89532eb231520. 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/DEBE72200496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb83f94f60f4141f160928ee519284dcd5b410a6a5a3e9ae342fc0133156f17. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEBE72300853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11e51ac5ff4ed091fd1c47eee9aa272dc82c250f7c353749afe9834edecbf4. 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/NLCK42400384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ed21be18cbbb42b8d3592be48a0b3266b0670c089a4de36ece2e3d3b5f6b1b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEBE72400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5e904b17683b3015661e96422f4c17b7f294ade5c101d019ed18831ec41e4a. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:18Z), 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/DEBE72400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35918f85c5e14b117e452c6e9dab5aa3dfcbae97a47d0eecd6243bac4191962. 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/NLCK42422205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94950a3f8ae986eed94e63bdf27833eb1eaf8d275e518ee9364cfa3e9733de. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:57Z), 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/NLCK42422206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5103b7cf4ac967738714a2c41c8a5882a49bcee7c45b7db3188fd23fb4eda3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/NLCK42422207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8d5aa45d0038b0659bdef4a2a66054c7e05c0d95ff5a3b733cff3640cf9d6. 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/NLCK42422208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4585fcfc15c33dc1118882a0b77921e1b3223680054883c923875a29ca443ac. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:12Z), 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/NLCK42504348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aadf90e55c2a700bd5ae7c874677bffe04ac96e85122eb43700ee40254395b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:47:42Z), 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/NLCK42504350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6022dc47d0962bb6f115cc41f36aaf854f1d87b9462e4b580393d6ca1573cb4f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DESR41800241.