Biduanita Negara Kartina Dahari (12 November 1941 – 30 April 2014) was a Singaporean Malay singer and entertainer who was a fixture on television and radio from the 1950s to the 1980s. Dahari, who was
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 0x7e3ec457e47c07ab54af86685f47ab5c566453d1eac3aa15b2eec53669245f31. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c763dd7c-9ba2-47b3-8052-e07550c898a1.json and https://artists.proofprofile.net/proofs/artist/c763dd7c-9ba2-47b3-8052-e07550c898a1.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 0xe28c4498218452b401658995a5d86e508bae96a0c0127c71c057f10fdb4b599f. 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/SGA030701415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a33430cb5a087321210f85c13bd79eecb7870776936bbe3cd2b20ed557911b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:37Z), 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/SGA030701417.
Dari Hati Ke Hati - 2007 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80698c81bee2eede8d7e4236f210d6df8e124bb6ec659c62aa46022f93c8bdb8. 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/SGA030701405.
Terkenang Kenang - 2007 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1126be3a39021c2298063f9767c781f8bc8ba4d054716314857716746a3c1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SGA030701420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c4a0d91e1f7cfb5309d003ae188737d7153f465509abbfe03c43e3e5168212. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SGA030701406.
Di Bawah Sinar Bulan Purnama - 2007 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d297dbd27c99edb9b5302aa00c19a31eb37880ef5b872767ada3ec3f6acd1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:49Z), 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/SGA030701424.
100 Lagu-Lagu Popular Pilihan DJ Chauari Selamat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc785708699043cd6ab9bb6b0439f4e67b775c3b43776278b23b4d719d83b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:58:42Z), 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/SGA037400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc785708699043cd6ab9bb6b0439f4e67b775c3b43776278b23b4d719d83b8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SGA037400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adc785708699043cd6ab9bb6b0439f4e67b775c3b43776278b23b4d719d83b8. 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/SGA037400383.