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 0x73b2b83d66342e7fefde23f76ab02e4af86575d5dedfde686b16574a10bc2fe9. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8e4009c-37bb-4a17-8e15-43c339589c62.json and https://artists.proofprofile.net/proofs/artist/f8e4009c-37bb-4a17-8e15-43c339589c62.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 0xe1c91233dc49aa977a4cc6f56525141e496c17b81828de8d7951da54905ddcd1. 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/QT3F62530620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e17807593567d259a6bdb5dd0e24f4dc60252e04092307884f7b12b07e4e38. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3FA2546768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561fa87fab95cbee3dcb232c89cb63c6bf557cffe346ed8bd9093ff54b74610b. 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/QT3FA2546536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72538da253cd873be69b1b7471479559454a11aaf206beaab86dbb9686276988. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QT3FA2546757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30774ada7b08e2e35708962892b4695b889cac394b6feac8e56546e60655a44. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3FB2555198.
사랑한단 말, 왜 그때 못 했을까 Why Couldn’t I Say I Love You Then
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bce259eed8c09800fbc4e719349b8405b1ad854e87ac0d43494956bfbde016d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3FC2523874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95baa3258ab3934e8217024b61a3b9f29a4934678d2e87486c1ca1799ff4ba9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QT3FC2523976.
Don’t Walk Away 제발 떠나지 마 (English Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee578b1e10fc37a6a43e35d0d15dcf1553a63e399b65dc45476f90bf2f1feb4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3FC2523969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e9ac804a09259af8c4597088f74c022beaeda1ded62f3fe45368f236415bcc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FE2512599.
A Sky Without You (그대 없는 하늘) [English Version]
A Sky Without You (그대 없는 하늘) - English Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecddf2a6381db7b966747165c268244222e6830f1f460101043edeafde5202e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FE2543921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ae864ab1ea5bea18bfd08b6e855eac91d3b846d8e0462f9376055fb173c364. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3FG2532370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d875add8686c31f8cc1da75a2cb34649dfdbd1c569fbfe9762b4f9f1ce11d09. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FH2582486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a567756a8fc8fb79c96f39b3e6689bf01c3c09b7741f634db03974ed0afb23b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT3FH2582508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dee4df2cf3ab923e48f021e1fe548eff006d2153fbe1f9917345ce5a2e55572. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QT6E62565995.
Don’t Leave Me Alone (Female English Ver.)
Don’t Leave Me Alone（ひとりにしないで） (Japanese Version)
Don’t Leave Me Alone (Jangan Biarkan Aku Sendiri) [Indonesia Version]