Doa Putra Ebal Johan "Utha" Likumahuwa (1 August 1955 – 13 September 2011) was an Indonesian singer from Ambon, Maluku. He rose to fame in Indonesia in the 1980s with his album Nada & Apresiasi (1982
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 0xbf49fc6f4dc098bdf4968189b96eca4277540898f46f6e96d17ef6892a86c7f4. 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/a76e8261-58de-4d0b-bebd-b957bf8d9bf1.json and https://artists.proofprofile.net/proofs/artist/a76e8261-58de-4d0b-bebd-b957bf8d9bf1.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 0x1e70015960eebe85802945d56d62e5f3e536674116b6563642cd0a8ad8d9a884. 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/IDAA21700795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ca3f03afc5bd3b7e1cb456e276e2ae17fed621d65cd543d160daed45631df. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IDAA21600365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a88455f477f598d96626a56ccff4edd75b2894b77d778148ceafa6d170e6a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IDAA21600364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac235fe794caed099869b78688a7d7365f0db133998dab94757f46ade329793a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/IDAA21600367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1f0923811f50044c9e4319f6269c1efc0710bfab990fc74416cf3d1a2e4239. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/IDAA21700797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884b0ff339784f1a38d8038a5aacdf5ae0b45c24843164da21a8f0ba7c1c2eee. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IDAA21700798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e4fc1fdebebc110157102c202a9b35169a463636b24836e0f724786cedd96. 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/IDAA21600362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c8e493716ca28d03305bf147a3f6e0a0ab914ab09936a8099853771c435e8b. 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/IDA181100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001e955ac8f650d3252e5bee8f4b6c8ddda50b79d162326db46a6ada68222e11. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/IDA182132548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69a391173f4975df2198916ec255fcd9fc46ee7975dbc13bbbec4d1518ce399. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/IDA182132554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505e08dc9952faa3a52cc592fd2aea0822cdadd40dda0068616121bb56b8db4b. 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/IDA181210905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6dd3c489ddd515ae66922bede4ba80c7ba368af623475db90c9d4318969d0e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/IDA182131410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc968cffcdb5f898c7fcd9a35f564914ab943b238ba2464dc80ab4a2be9c2e64b. 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/IDA182233031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823864899e298e7f7e06171643536aa5778ea070f2127e32d9a5c0c1f4ad68f7. 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/IDAB30611799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e4fc1fdebebc110157102c202a9b35169a463636b24836e0f724786cedd96. 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/IDAA21600362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4f19dd706d90f535ffaeecdab3745af201e0787babb51ac816d42b3638bc9c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/IDAA21600363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a88455f477f598d96626a56ccff4edd75b2894b77d778148ceafa6d170e6a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/IDAA21600364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ca3f03afc5bd3b7e1cb456e276e2ae17fed621d65cd543d160daed45631df. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/IDAA21600365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cbd5e37b3bf50441f68103ab5e0d25458d541c01b1d5c6090d7443859223e3. 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/IDAA21600366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac235fe794caed099869b78688a7d7365f0db133998dab94757f46ade329793a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/IDAA21600367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5411a7255b6edcb4950ddae6f13aad4813e3caf9c6c0a41165f7dd36330dd0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/IDAA22001162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08ae07640a4f2350d248337368c5d790df9f9f53c6a4311bc5e9385b2a046f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IDAA22001163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25f997d3c83a52bb834668134eade8edfc0e9a0c3d3c8fd109f4e11e2772f91. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/IDAA21501218.