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 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 0x3041329141bbde07503280b908610352740391d1fe6937be83caf0433a9827b3. 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/6eb7cb7e-5d7d-4c5c-bfc3-0e33e5717664.json and https://artists.proofprofile.net/proofs/artist/6eb7cb7e-5d7d-4c5c-bfc3-0e33e5717664.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 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 0x3f694237ed050154a69f0cf71102a2aa8503f9a661dedcf15033f67864a12369. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRA900800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98218b396bb2504d983746331ba78a5c89b18db193ec66d7d37deb63d689b3b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/KRA900800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376c0305f0c4d5a919d34f5ab4abe16df98e4bb5810f82267780617268cb8783. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/KRA900800113.
[Vol.15] You Hee yul's Sketchbook 10th Anniversary Project : Special Voice 'Sketchbook X You Hee yul'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d725164731a1237e1ada8c3dababa2bd902d647ad403e3adbb741b2f8adcf0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRZ291610208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc488f5cf6a5d037f06b3676826bccac01c5ebbb38274d90166107268a94f6a. 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/KRA381209928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f52367da0fe9aacaa7439704d442ff7374439da30e7511757b327917dcf2e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRF681801128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e214316c1581ebe0708160239b10cb23d6c6f12bc01aeb5fc73881be966270d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/KRF681801133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e09950c2f041e54ea71aa7bb49e4fea73d9f85aa01d983fdfd28731de7f9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRA901100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6021c1fef1f99196d42ad84d495bc49521f66fd7216162c81e235709366f4886. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRA901100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6910009e65ed5d1e6f843b7f4bce5abff462efa1b21cc4edd96693838b83ae15. 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/KRA382163896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e80ca65a927bddad0df56b5fdfa4b556f6d5b69a83c34c9b57cc9a52bda4edd. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/KRA491402728.
Merry Christmas Only You (feat. You Hee Yeol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32003a2e200a58ce9bfce8ed2474f3f0023e50f729e8d8d2a60c4789b237b6a0. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/KRA301900351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb220912c4566bcde12d07e8b5aeb79943038684c19b45704ad79fd47cc64c6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM1809754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447beb073d42edd0970cbbe3fbb2d4d63b5edfe2f411bcdc0c2d2ee35ffb0e10. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRA340900577.