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 0x80d40bd9c482f721ea6cdf8bab4e8b23e3c7f67985141e74f60814fd004a9962. 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/ff40b7a2-0658-4b5f-a145-9c33d467f443.json and https://artists.proofprofile.net/proofs/artist/ff40b7a2-0658-4b5f-a145-9c33d467f443.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 0xe8ad754e45dee11a3a461021e800d04ac9e2f34ee329cb9ffc4d460585a207cd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZEKE1928765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc297a317a876a96f6006c61fe92d1705dad1d2de3911671d8e51b75a50355b9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRB471404466.
Love 536 Days, The End 21 Days (Feat. 가음)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd02d38da91120769f6d6fed2e8a25730d3c0e04f528dad621f8dda11a8efce. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/KRA341522086.
Cherished Memories With My Love (Feat. 김꽃)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b79333e31b776c21faece2fe1233edbf1c09e19c4ed149cd0f7bd34fd63882. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/KRA341620180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e033f0e07c5970b9fcb842929ecdf6afe03162c47cb8d69c508fbf8782dde4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/KRD871600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5733e6a7b7bd0f7d27e1c5148f7598bae474458bf6853af9f92e4458c68b986d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/KRB471700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb516d5f596d60d677d057c03190f7dc00b213282a314df6ecb88a5b82125d024. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/KRB471701790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693fe22e8e4c97c9ce30e9008a0f8524eee33f77343596642acab21a66b24ada. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRB471800588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d16b9ee7476ea43bf61910eab0de7f2a0d15c1d2cc70c06fa520f7d22efe3b6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/KRB471800827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b18a90af1cb18fc8180685f9a64290913f474bce86d508b06eea519a11a16e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/KRB471801665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438f81a9a92272a964c3167035686f780718098f7fb6d0190bdb2f61ea56d7f3. 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/KRB471900467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9107a865ec84153a028984b5b3c7eac4e613e1639876bed54710fb811c7f6c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRB471900630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f13f17ab8d99e3e88f48ea13ebd91d3b10af621fa833a6d83b2adb562598d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KRB471901816.
Again, As Winter Goes and Spring Comes (Feat. 신예영)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf07f6d2b68a33c18c683d8f731c7f463c50c1b777688816478a2f382ff7a1e7. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/KRD872000001.
Again, as winter goes and spring comes 다시, 겨울이 지나고 봄이 오듯이
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f34ceec3013bc4f86f75d74561ae6fae05aabaad96cbdcfc097daecf51b538. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/KRD872000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426bc2420803aae65f1d823802f852ec63fef2c581d53283941211ed799bbc24. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/KRA382405209.