Marcus Chang (; born 28 May 1983) is a Taiwanese actor and singer-songwriter. He made his acting debut in the film Café. Waiting. Love (2014) and rose to prominence with the television series Back to
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 0x72626e76d5680a8eaba48ce197d04d11f270dc77804a9031de2e1b1132298b3e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75e48c57-1ffe-46ae-935f-6e1427de8bf9.json and https://artists.proofprofile.net/proofs/artist/75e48c57-1ffe-46ae-935f-6e1427de8bf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
星空左右 (三立偶像劇「三明治女孩的逆襲」插曲)
星空左右 - (三立偶像劇「三明治女孩的逆襲」插曲)
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 0xa3abacda445c66d0c67958b5b22d25e8dd031493a3e1c550d310078d6d216ee3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TWA471806003.
我們之間 (三立偶像劇「三明治女孩的逆襲」插曲)
我們之間 - (三立偶像劇「三明治女孩的逆襲」插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e100b6dc9a7de19cbe8548e4229215fc48776418ff9c51ccf88f8052b9c666. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWA471812002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efe3e4f911698a7fcf93015a65fea2796d6b108c01ced1ecabebda38bbe7b72. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TWA471920003.