Produce 101 () is a reality television talent competition franchise created by South Korean entertainment conglomerate CJ E&M, based around the formation of a K-pop girl group or boy group. The format
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 0x8623b7c559592753ba153e722fef1dee378150f9badb608c6e2c2c139b65265c. 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/c23761c2-60fe-4071-a0c9-06ce0146554d.json and https://artists.proofprofile.net/proofs/artist/c23761c2-60fe-4071-a0c9-06ce0146554d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nighfall (Produce 48 & Produce 101 Remix)
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 0xc5be703c89b72d043be936f9351026f35c0cbcabb41af9aa526e12d7e5ece316. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA491601203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9683c1bfc7289749f7e48a4e2392ad2c0743927d7aa1c1afbfc1ff3850367c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA491601204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e5441718e8ac583d4ab8d0f283fe919c4886b02e9279e3a58c74fc6f3473cc. 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/KRA491601205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d18cab6519fd0c03b41ce5e441ddf13833df6da50bd56ad23b163a1769bd4ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRA491601167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e67c38360c3241bfcac543d233207fb16b3b6a13e6119f7d0887c0c529ec21. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRA491601168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0d7d55577f57b4fa28eec867c93bca5588f50e48c5f041fffc0ce39f7e3b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRA491601169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab52ffec37e638034fc0500cf4ea5499b68a7979d4141fe8467603a66391733e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA491601170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e25f97edc9c88821c76c300eb15f626b071900ee4eae972a73e9322212f1ed. 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/KRA491601171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8842f7b5786c48f3d35f020e4fa302bf2ac4eb5d30ac423c017f230e4f94c0c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRA491601114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f133492aa707303d3938f896e5e6f6b64b8f3a3e4392c722132968ce3d6049e. 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/KRA491601029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae06f92855b66ded7e33fa0ec31462f7a4010968770d3eac38a5ef8c3de570. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRA491600219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c03a707db45e45bea738293f97d5f6a3054c91541a656dc6b2f773df6af710b. 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/KRA491600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46df47a33329b13d576d9388b3443b5663303e4873cd36b724dff60a236ab01. 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/KRA491600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349926ff07646f8f4081e5cbd4ef11560f7268f0a36d246a21d4e244e06f164. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRA491600222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe566b044a30b6bd6a47ed8170f40f83e1d253026640a04dc22df1a3ed1c30a6b. 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/KRA491600223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa743403e7c5e00243dd8f36046135b02897718ea6508ac025e7f99ee5d6a1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA491501095.