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 0xe5b3d5e9405a6e5d080427c07330e3f1250f76d32f4d3e558e9971da3975daa6. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0468d30b-af46-450f-955a-9d84c6c603b8.json and https://artists.proofprofile.net/proofs/artist/0468d30b-af46-450f-955a-9d84c6c603b8.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 0x4d0d7df3e9c753b8b35117f5791250e994d0ce4225d2dfe48cc84732bb3d3255. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KSA002201423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541f99bc6ab2929fb822f5feffb372e5f75bc5fd86acb719b93c2e4d48a84bff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KSA002201424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8157e3593a2c7cdf82154b78fc723e2a1e75a712f4e5b267f37fa2530906ec. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/KSA002201425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137c7cd9a49ab12dbc833ddd0fee807465170bcbfa199ed4f06783ada4eb679e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/KSA002201426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c3ecccfb158428ffb65dd9a176d00e0146116b1e5c79679ec8c6d24a3dae3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSA002201427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907db19ed525cd0b9dfdea582011b1a3ae319a347a04a01c8211556c813abc78. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KSA002201429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d910621ce2804e91207457ed47312275fd413dfa99959231faf45c08514d2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/KSA002201430.
UK Freestyle (Feat. 안경잽이, 하회, 372, Bruno Champman, 노아주다 , 릴호동, PPARISKKOMA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb01545b7d30df97d0e9301103fa396b609a843d617695deaffe178a619c4d7e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/KSA002201432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd06d186e33a95be9cc00bb548af737e18ceff2b96f5bd8a140a647b11b0ce4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KSA002300940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de60c204aeaed2b5fd7541d1cbec8f69abf8cbb4afd8bfaf9c10ab41ab6c95. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KSA002300942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0734cbefa0ae6a94a06f384d0d14c4c25278b28a19b1a637bb930e7437d5bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KSA002300944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515947e444a55b65122ebe0511d85b9e972bf973e4415cf4c17ff4a692db33d9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KSA002300946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce12578d113e6fe6999c99a0a30c6faad071703972cafa337262f77430c0603. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/KSA002401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefc29f845d5f71cbd97483f1976e76255eb11189b901fd02711420dcc71ef97. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KSA002401084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696e717e1e2caccb3a4afcbe286412d3d962bdbf3a03aa15e0517faae2413ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KSA002401085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af75a07814a61ba2ea6dffeaacfb66cdad019ef09cc97be36a189f97af21f56. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KSA002401086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d17e485251640a6ee77540260b53d51e52fe9658ec6aaf6e2434802b11e40. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/KSA002401087.
Smash2! (Feat. CHERRY BOY 17, Don Mills)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4022f2704dfa0535600844e25f86ff5cd91c53b5edd5dcb100a78e7573db3e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KSA002401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89befb7d3c294a46f529031dd0952a767f9595c89ade211725b0cda7148ae925. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9NG2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89befb7d3c294a46f529031dd0952a767f9595c89ade211725b0cda7148ae925. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9NG2100053.