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 0x6cb337f22ef678a5eb3b506e6940fb94a1a5e7c798335ffb8e25c3b27cfc1635. 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/349faff0-731f-4a86-a67e-f49447cda9fd.json and https://artists.proofprofile.net/proofs/artist/349faff0-731f-4a86-a67e-f49447cda9fd.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 0x1770a4cee048ea06ec0c01d5655774fb5549a212d3df208f39f76871cbf33d12. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM21734638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030d008d6312c9fbf70ae5ace6006adaaabce8937a1a4d2d27b42d023c976c13. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/USHM21734639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f67346ab03c3ecd56736b7350a89daface920982a2f828b1dd1ccc9559ee12. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM21734643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9e63e45b52e1141bf99a0e7532c053a18157557a06871ba4b094240423238. 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/USHM21734647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94202e986c113a56929965c261a12fb6e5a17b76c1023f8cda7532eb90ce69e7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM22309809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c60de4e550995276aa3c6622d1d8ca175768bc0e2ee5fba1ba8f92f6c16613e. 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/USHM22561033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab271444e394004e026220aa8dff2fb4e6f6d7768f6148b9553eb2c1119ede. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USHM82549524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda0be4d3fe5338414379a4a0d27f70a7d7b3f5aedcbb693544432a5d40bbaa0. 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/USHM22561028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d397396789dd682ea8451e2214c80d0ea9d9636dfae0f18eb1b43f096e3eed5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:01Z), 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/USHM22561029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c28a718ff2872f941b180de93cdb8491383b693761275a6c97d71f8efe37d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USHM22561030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e060baaeeab78ecb9d6b8e10bb87d50ef8cc608440263a91bb7b05fb96aace7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM22561031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01873f7a0ca67e6940140464bb7ca280e6083f837bde542f5af6abafa1a206cd. 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/USHM22561032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c60de4e550995276aa3c6622d1d8ca175768bc0e2ee5fba1ba8f92f6c16613e. 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/USHM22561033.