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 0x8b1b45fc111190145e3e674b7215fc18d08d78e00e9bde86ced640c17eee6ad3. 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/b47be8d2-ecfe-4b18-ab0d-7baf16871af0.json and https://artists.proofprofile.net/proofs/artist/b47be8d2-ecfe-4b18-ab0d-7baf16871af0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x4e50db5be198c1c53f49d96d02ceba001968f461be1c8f7f87f6153719672bbf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2295355 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6e0f7541f8d2f986c0a7bb063987e672d8d633ce5ad07ba7bd9994efa37770. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2295357 — a six-check JSON result.
រង់ចាំថ្ងៃអូនប្រណី
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20598604e34e2c484a086f4cb99391b9f4a9a0250c228c9f105cf5e6f57eba19. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2295358 — a six-check JSON result.
ខំបំភ្លេចរឿងចាស់
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b9a21b6573795b94fa98e8f975ebec9f6a0c8d8493fbb8f589aea558ced2e3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2295361 — a six-check JSON result.
ស្នេហ៍បងម្ដងទៀតទៅអូន
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa91611f88d3eddc1a3773e79185387d6dc967947fe71f97937b6adb5080a49. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2295365 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fab7fe74db4f8307203e39b025233eadb94304a3f448464c1201fa6fdfce20. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2295367 — a six-check JSON result.
RHM Vol. 42 (អូនផ្ដាច់បេះដូង)
ម្លប់ពោធិ៍បាក់ខែង
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf3933bf716f4fad9b1ba937688f5728794eae5219d01ceb43f22b221edc200. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296247 — a six-check JSON result.
កុំស្មានបងភ្លេច
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ad48ce2fa7650da2ec29ddd0fba8d80a3c63007b0a4a4a8bee2d9d9ab2074d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296248 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a494c0119b28868e2ce9bb556a2ee9ba8291cb77b1f955b8d844e3f2ce06c8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296249 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed940566c069390195b67fd0f3bb7662fa4fe1f71caff0bceb72359eaa08c87. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296253 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a9da18892cf3e6eb219ce5c59461eaa80b4dd46dd7a842b1ebe68ca4910326. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296255 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eeff487907b1b5de74e10c501bdeb91b70d0cd8ee1aa29690f744f395eadef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296256 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cb53dab8d9d775d1f044f45cb329d6c1ceddb16936299e3bc8226ae8ed49a6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296258 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e11d3c9f4ab4f9f1204249f1510126eb4839ab601fcbf2539418319753ea98a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2296259 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2b52dc08852fa0fdab6627347a502e542bd4a1869776938e97a02992e7bd2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2271283 — a six-check JSON result.
RHM Vol. 81 (ស្រឡាញ់អូនដល់ឆ្អឹង)
ស្រឡាញ់អូនដល់ឆ្អឹង
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2c04bc3b63546116327273677d93a08f09180499261c6313ddf67b54dcbb67. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242814 — a six-check JSON result.
ស្នេហ៍គ្រាដំបូង
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bc1e0a0b020e3c14f13578ec4c60fe663096afba720bbe333ecbb029e7646f. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242815 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b30e74f790d30ded04607838c51fb3ac690a527d4a3aba20644e61986caf676. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242816 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e39645936ce8cb49a640fbcbaa42eec592a6b901fb404731b49b641f7556eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242818 — a six-check JSON result.
អូនរង់ចាំមើលផ្លូវ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08360a555ed27c5f8c8bbac1189b781413e1f325b953c1f1473f6f74807c3afa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242820 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc4c4977ed0202c1e9f2c802c31d73516a0aa24124235ae66d042c30ba924ef. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242821 — a six-check JSON result.
គង់មានថ្ងៃស្រីដឹងខ្លួន
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799540aa4c11522af585a78f4f7ac0ca3b0ea7af90b0b28bfdaf1953d151dca7. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242822 — a six-check JSON result.
ព្រែកឯងដាច់អាល័យ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbfc188cefcfa6f955a29d5fd0cd91e85fcc77e1ee8a05072a7f42cdd532dc7. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242823 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff92fd43d61d65cab791eaacb442a1a754cfc5c10b01a04d1ae2d8e96782f6b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2242824 — a six-check JSON result.
RHM Vol. 85 (ពេជ្រមិនទាន់ច្នៃ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0617459c8ab4d65bb1fc752227a0f945bdad13f04df04ec193718ced6ecb013. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2264752 — a six-check JSON result.
ថ្ងៃចន្ទចែងចិត្ត
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1780900cb47c5b62f55500fd09bbebd8097dddec2003a9567c318ea1e04e86de. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2264757 — a six-check JSON result.
RHM Vol. 154 (កំពង់សោមដួងចិត្ត)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79099e7edca640964c3f73d0d662fdd220bfe0a021890a9fb083fc5c6486009. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398138 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76eaf4e7588ae791bf94d4b7fad25f8380e88e061baaa964c8f10efe2346ab. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398141 — a six-check JSON result.
ដកស្នេហ៍វិញទៅបង
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4694c7d80058c85c1881c0b3bef8d767c73136a454b9b6747ac6cdf20b5d24f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398143 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330725bb067bda2d7f16e0e164ec433f10204071731570359109e93a4cbdedcb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398144 — a six-check JSON result.
ជើងភ្នំពេជ្រនិល
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4185e05e68bf54a0d32ed431b856407b63feb95aa172563a7fdb665fe56faf. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398145 — a six-check JSON result.
ព្រួយព្រោះព្រាត់អូន
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99fb17ea9193478934730b348a76b4d8a2ff15b5393f9bbf9552f8dd794257f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398147 — a six-check JSON result.
RHM Vol. 157 (កោះកុងអន្លង់ស្នេហ៍កម្ម)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fed7fa00afe81a93d12508847c7097f11a023d7c21252c81513b2da69b023ab. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398260 — a six-check JSON result.
កោះកុងអន្លង់ស្នេហ៍កម្ម
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54ab5286e137c7d91cefd9f0966758ca3cc14216fc76afb2ef0709d7ca32645. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398261 — a six-check JSON result.
សៀមរាបចាំស្នេហ៍
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29846fdc0fd3e1fb3d93345b0c84fa30cd98c683e9bf1b3aac115e2e2677432c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032398263 — a six-check JSON result.