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 0xf09dda91eb182c7546b2e6b443923c1c599132c53a80ff5a7043d1e2c87b32f0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d12888-d2d0-4206-84b8-e9b7607ad340.json and https://artists.proofprofile.net/proofs/artist/97d12888-d2d0-4206-84b8-e9b7607ad340.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 0xa0966f5ff8ed02f614526a9e310893016916fa6b6c6cd59fb64ad403ca3a22ba. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KRA381600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a9b3af53e55c8e567cfbf2d1df58cc95aea930ea8d79661850ff49c608b07. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/KRC631700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881626e9359c8841724504360fd7e7aa850276031d629dea63f50af50f007fda. 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/KRA381900746.
Bong Joon Ho (feat. LIL GIMCHI, Chin, Louie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b7e3592fb57027657142834befd9d2ac7b736f67833942cf4deb710709edb7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZZA0P2221739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b2f4878a2b5e9251541824af97930dbc9e620293b545cf00e794ac3fd77db7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA382404589.
Pretty (feat.Louie of Geeks, BrotherSu, Lovey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce1c86304662a989061ee699aa87b819b8108f3065a3ec8acf208ffcbd99c8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRA381602134.
Finale (feat. Chin, Louie, SC4F, CK, LIL GIMCHI, MADII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac640feb534b4211f36d7483e8f03ec49eabe938b16232d9dcf6902aa0d5d2d9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:44:59Z), 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/ZZA0P2221742.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e97e1f89b6a51437833e39a7f8c67514d1693669c3d3fd3bb7dd9bb8561990b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/KRA382206615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb22a0126e95be57ced02245b0a6cae6bcf89685fbb534279b774f1e942da28. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ZZA0P2221736.
GUIDE LINE (feat. LIL GIMCHI, Chin, Louie, SC4F, CK)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ba1091cbe79baafa81f9251ddcc6a2474cbc6a70f62ffb39796966c3fcf2e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/ZZA0P2221737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08efcb55f8ac76b60bc79359911a94c646cc06d22d4a4f6f98ea1dd5e84a3f3f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/KRB471404481.