Fantasy Boys () is a 2023 South Korean reality competition program created by MBC. It aired on MBC TV from March 30 to June 8, 2023, every Thursday at 22:00 (KST). The finale was broadcast live and an
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 0x07d7eb16f7d4fd959e367964e628dbe4737e52b81c41611f2c03d61c1e7f66db. 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/386776e7-b48d-4d09-af3c-e30525e3c3f1.json and https://artists.proofprofile.net/proofs/artist/386776e7-b48d-4d09-af3c-e30525e3c3f1.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 0xaf9b77afccdb7b0b69fd6e66841112daa0538c7145189cc22fb91a037ae9d981. 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/KRA382403025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9902a7e610e08eb916c1e5fa327ada3a9ce42bf20f2b7f088d1895c6c22a2f. 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/KRA382403026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f0d880e65b3032d89290e1c4dc7f8cdf963f498cfeb1c2aaa49c40271633f3. 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/KRA382403027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a273964907505126d1ebe1ce0158825a6831ed578999fb513df9d755f4501. 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/KRA382321838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340269f63a3c80bd1ac446f38c3b062445261aacbfec4826a151490607afa832. 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/KRA382321839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733fd09a91e2e027c4e19210d6df7c9c29d679d08011aef66e54ad17cbcfbced. 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/KRA382320686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2c53ad290d3edaa61cbc90f07c041c88a14246183a4c1e0c4d1dc1a8d21b64. 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/KRA382320687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860945680172b3c19b37908004865a5541bab1ec38598303e949c4ddaaf9f886. 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/KRA382320688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeebaa372bb14546f660bc822365391d0a89b4fdff9b5547538ef7b0faad5043. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRA382302797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb61efe056f2ce575956dac20fef9b65f7a3f3e78f5223334faac265097e1734. 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/KRA382302798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ca90b04e73976c064460ffd0fffebf81d4d651ca500adb87ea0aa9e3d35f14. 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/KRA382302799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780e55a5d8f085b0d3866da9351907a1a224becb27e6ccf4bc55f26ea761eae4. 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/KRA382302620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7b535043296e4dfb0beb438891f352b42d22291e2f877a3f4b2166ab3fc4a3. 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/KRA382302621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7843846d499f0ba027c9c4aae4845c50b1030030dff054185a81d8ed51006614. 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/KRA382302622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70af9d56ecce21a0cfde3f26288cf5e520eb2903c468a15b5b54853ccbdd96. 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/KRA382302623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276aa110b62b7f59e0347f995f7a5cfa5487612bd1933fd75fa17faf25716585. 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/KRA382301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc2db67a827b47efbc3dc4ded0ce0b388c03464bd778bc4756fb04ad8d3b31e. 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/KRA382404313.