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 0x7c3f00f5789cc2b7618981bdea985dfbc8e7c274594b95a91b88ebd4832d3b23. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1df50d0-074e-418f-a41b-4e7712532ce3.json and https://artists.proofprofile.net/proofs/artist/f1df50d0-074e-418f-a41b-4e7712532ce3.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 0x4a72da8760efd1c3d0c59e76a475f8395d33e0cd204dd9ac2fad9d8f7b9bf4cb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:35:25Z), 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/DEZ651336208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a70c687cde9015a43e171b7ca93a9d552f88d3fdd7777884b3b98e73da5cba. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEZ651336213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c6b611af099c660d6b1b15524fa27591d6d919a6d7a85f86c06992a4c1c06. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/DEZ651336215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887f16f2d0ffb6eb631b3c5342acde2cf3d55c504638f8e079e319b04e7d62f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEAR41616894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880f6035d6633f6dc6954be830bc91798a33549851696aa6fd95f4f8a6c91d37. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEAR41616909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad24599bba56c346a0c66319eb73175efe1aca96037199fab3cf34e31ef434. 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/DEAR41616943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc7dcb37f1677b8ac9e3a013b296aa8f7e1efbd4cf5c8c7bda8494c67011c60. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:51Z), 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/DEAR42025476.