Ablume (; stylized in all lowercase) is a South Korean girl group formed by Massive E&C. The group is composed of three members: Saena, Aran, and Sio. They reintroduced themselves in October 2024, and
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 0xcc382155863dacb355d18d5ca5676fe691b4414ee94ca23460e0a085a801d324. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28eb8bb5-b2b0-49a6-b5ff-5313d4279cf0.json and https://artists.proofprofile.net/proofs/artist/28eb8bb5-b2b0-49a6-b5ff-5313d4279cf0.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 0xbff7985971ea91cc0672cea650f6a76d95d7fee5447b951bb01e16ec35cd091e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:25:47Z), 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/MX2832475279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a003deac43ffcb0addb88b0e323ddb86fca96c92a35bdf25055ec37764c60eb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:51:37Z), 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/MX2832505105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74785c4897490641cd0aa2af2093157e79b838a069b2329925d3df0dd8e555d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX2832505106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05a5492aba0da1d1a710eff326438da5b3daf6406124e52f1b6826fb509662c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:18Z), 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/MX2832505108.