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 0x33c45ffa2c0417511a8037200f914291960982c02b36bf883034aedcbcabbaeb. 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/fbbe60fe-d8f0-4c69-b826-bfd8dd7c7084.json and https://artists.proofprofile.net/proofs/artist/fbbe60fe-d8f0-4c69-b826-bfd8dd7c7084.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 0xe31787b2a59fc4e9e71fa0533b93bbb89c2fab0459a7b26ae7683f7762b56a18. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA882024532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1adb05c880c82645cf491799ff5c081b93daa355853eba55a7f964e7092f82a. 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/IDA882024542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298270196c66d683819234df246bb466e4e1f40a43a336572d1adeab4631a5a7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/IDA882024544.
Hendri Rotinsulu Menyanyikan Karya Ismail Marzuki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae9990448fce1b0aed732a66ccb637b599355a69d40d3736776d8fd5bddb1a5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IDA882024517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa904e16fddd230984aa5f60814a10e392a1aa8818f14f0e2ac0451cf39362. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/IDA882024518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71cf09caeb86be708bf8c18393082a9fcd9820fb38c1d823a1a05c157166082. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA882024522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023d44fd02be329bc398ef88ab04bfbea01cc5f00a7808d8b1fc7e09542b72b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/IDA882024524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacef1333209b8f2141c9b3e67025d067cddea07bb715d763d08f08f8556ee07. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/IDA882024526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab250f5df71d4c49adb66162a9f93adf906d4171c9fe691c7e66f63e64e6556d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/IDA882024528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b3a53a988ca6c7757b8c29fa4f55d8618071bffcefb8392f3cec8eb724980. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/IDA882024530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb7829e2bc21d62f0e356d16479a220b11628c8f3d7af80f14236ea02d8b65. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR6V82630666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ee75acbe9dcaee9c85585c5de385fc38668daa3c75b9ac88e8f5a467cddc42. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR6V82630669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed4c2e4fce12f34b3b060820fdec8fd676343dadd8e47e28b807b9796a219e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FR6V82630671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c88dcdaa4b180f09457577b620a7f137a510ca20294dddd1aded993e11a53df. 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/FR6V82630672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436d371ae2c5a86713725afd15f1de4f1bac0d9bc12dcd3b6c8a41dc6b8cdfa0. 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/FR6V82630673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa172c149515c5c2881c0e93a695e94db71d0419de4c48f954e356320de5cc328. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR6V82630675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a95a4729a07d5af3211a1948b6bd41ef741ab6e25b6cce86915c5b05e96122. 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/FR6V82630676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855afa48bc53f9d2808fb103c66e362590a343280d3d409596f6c86497555874. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR6V82630677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ec1fc1a898cce4e36ad8feafa20fa988aebfc107a1b3770f47e778f60c47db. 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/FR6V82630678.