Efek Rumah Kaca () is an Indonesian indie rock band, formed in 2001. The band consists of Cholil Mahmud (lead vocal, guitar), Adrian Yunan Faisal (back vocals, bass, guitar), Airil "Poppie" Nur Abadia
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 0x6e232347716bf4b423de2f6f5efa252a7549503f099c1239564139bd94ce3a0c. 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/6c4f17d2-bd9a-440b-8a6d-7f94b57a2e83.json and https://artists.proofprofile.net/proofs/artist/6c4f17d2-bd9a-440b-8a6d-7f94b57a2e83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Together Whatever Sessions Present Efek Rumah Kaca 10th Year Album Anniversary (Live)
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 0x878e412af0868340ef92499c3d36d4158968d4f848804d9c4e2547cc756b8519. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P1802414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449105ba89899744ed609f3f713f5073fe5ab59d53b63ea6156408d7b260eea. 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/USA2P1802415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acf7b40c341a25ec2eb0ca1fe3a8ec2e58c8a0089c4f8af8dfa13d4438aed65. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USA2P1802416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc64ef4823f4213330fd0e622df12f0692907ea2680ca6dc99f8f7d92c2770f3. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/USA2P1802417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596c8e68eeea07aa96e496f37051887ffa0c2bd07aede64ab4a02c68cfa8ee1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA2P1802418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f20ee4c9b5a4a3f8a9d62cfd5afb12d706338afbbbbe5f82fd6b7a49e191f4. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA2P1802419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed806cd83b74e9e1bf31d968da416924c8d08129789919b767972df1942bfa. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA2P1802420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a048a2eb76a10425d29d3dc2d07308c105a0b3e08263571f20f69f4f2858fb4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USA2P1802421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6f6245551d84b4f0bef63755bcc2c2fd6b34d0a1a0d59a6286be41da955f36. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA2P1802422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9734f9c26b8fdae67c9c8e5b1843c480e67904df4e067fa053e3364c58c1ce0. 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/USA2P1802424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c00b69e1572ca63360464825e2e9868d301274e455bd969400ffaad643aeaef. 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/USA2P1802425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c15ce49bd2bde2b9fb9e11864bfb4d6ebec91fc03778e0a531552366d82d794. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P1946648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6191ee9b983c92131a319a08edf0698e2f38472871dd829483a34de410544073. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USA2P2002886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19835aceae29d2ccf3fc68e2295a7340880d9405066f5b8998d62f229c8fe17. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P2002887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d91a490a93420531640f6156df079f5bd6f049b16e81dc96f2039644ac6b62. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52483ef1cb08170abc534be324688de5c3f51d44764856505c0c7ee49d41c7b8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1fa56bd8a2aff577e300fe4a22ab48e4e4dd4c8734a4df44bf6430fa9e1778. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f92cf1bcfa273e5b9880651ddc4bb15ff6883550c757c83562534c355dd68f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f7a40fb97aeb5053d50ac17b017b556e4f1a8dbbfe52d0b7483170d4f64837. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d5ae40326e41856699f99df0de1f6b620f82dc912b1952833029b931f38f58. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04a645d94523f4ca2524ae4b4ff8a735b00a9727538b2c27dc66eb1ab064afd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b0a29357e10e9de43e1437bec4f36f8e2dbbdcddbf076a6aa755317f0bc33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979fc36c641a57f6f63d24eccf7a8986d09609e26769dcf119a7498ce7749a94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465c91d25f8d7741d498aa38945eeb505a715056357f2763ed83bd592811eaf0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2300125.