Mardelas is a Japanese heavy metal band, active since 2014. They have released 4 studio albums, 4 live albums, 2 video albums, 1 EP and 7 singles. History Mardelas was started in 2014 as a solo pro
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 0xb6d3ce6ddf9fccaee76c94eade957bc1a2fcfa1e7b9f79feb3eea5eacedc5d77. 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/cec521b6-5c69-44e6-98c7-2a6a75ed439b.json and https://artists.proofprofile.net/proofs/artist/cec521b6-5c69-44e6-98c7-2a6a75ed439b.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 0x2b0e512a08590bf20e7cf7766a95d42534e64d51f8c354f2599ac5e6a7a2a9c6. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:55:52Z), 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/JPKI01512152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b97f36c89acf007cc86c38e23cbde55022603c60412f4c3d9c158ec42b03386. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPKI01512154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aeb19a379d6d58e6def33f40c89331ccd84805932d414abdf3fb1f48b8f65f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:57Z), 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/JPKI01814333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e59a4ec40793916ab6fffa7bf6859b3395d41d8f9908536814254f62c442cd4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPKI01814334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cc265421d0cdcb6c23d17ce7c419bc20e82382f96c6c32dc449b8f2c635e08. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPKI01814335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb79927b617f57fd908945654b78813abd5e99ddc4416deff3a19c91440e83b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPKI01814336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa53fb5476570b05afe8f7d32e5e3ecd5f672e6f21b011f890c86e08e4e8afb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:30:58Z), 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/JPKI01912692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965be638a9256d242ef4c2bfa77ed289331c553e19e17271d213b4ea8ff44b7a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:24:58Z), 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/JPKI01912693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ebaf2393497a2a84225ac8d99f4a668ae3ed61f421d7ad95fb88f0f5d1505c. 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/JPKI01912694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eab8d603a831d49ad785066f83f7f2a9fb87eb8d5854bebd4e5cac37e37c10a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:43Z), 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/JPKI02213832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56050d48ae0e59e1baadd2ef29cc0311c8f0f595e9c0b8f815593b332f7f215. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:18Z), 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/JPKI02213834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1371dbe9cffb6829db7721ab4e1fc750d61f95a4312a5a79f468e446d68f076. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:32Z), 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/JPKI02213836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6100b360ae5f1ba42b3122d06703e3236c46d968b75c68ba37b4b24bb2ec1e9. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPKI02213837.
Mardelas IV Tour 2023 EXTRA Vol.1 (Live at Ikebukuro Club Mixa, 2023)
Mardelas IV Tour 2023 EXTRA Vol.2 (Live at Ikebukuro Club Mixa, 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf2994180f31e8ce250910dfe2e0ad651ebcbf313219e1b3223913e3b3d847b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPKI02313652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef88ace99ca1af36c859eddf1a1c2b13cb5424da315a1430a72c43c96d37403. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPKI02313653.