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 0x3cc35cffcc35199868a1349f5392f0baeae704896117d6b3a7460460004f0c90. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d34a8a8-8145-49a4-a032-89c55af088fa.json and https://artists.proofprofile.net/proofs/artist/4d34a8a8-8145-49a4-a032-89c55af088fa.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 0x50428de9feb9031a410b08d7a89372abcccdeb1dd5cd6ad02c2442084147111b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:02Z), 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/QZNWV2309200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f798fe8d8ada93b9abe0924d44efb849d4cb1e9b928cc943a5900193fbe405. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWV2309205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6e79df1a03b36aeb13db647375b8d98b790884e340653469710104d6ff7ecb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:40:17Z), 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/QZK6H2481960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a1d6d748922d93633f6705a6ef528a8b82a54a2f9b729eb5a49d2618382755. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6H2481963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87f608b8237950b79b767bd7b973a108dd7b1d45a66c5c17c6b26162fdcc88a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6H2481964.
DJ Longchamp x Juvencio x Yami So - Skillz Festival_V1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dfa75118a53cf4a2b11aa5ea785416eecf9cafe467c0bed7ce0c92ebe01a36. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN52517901.
DJ Longchamp x Juvencio x Yami So - Skillz Festival_V2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55b5dc9e099e9b8453590167377444fdb09c8acb543113939b3db20818eb24b. 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/QZHN82567034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d68176a8da1ac23af79d976bb11e542b994bd4c381c66058f3f83937872a17. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHN82567036.