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 0x89d1dc949c8e3b1a736cf03c62f1e349d1fbdd0a00a9bc454c48496425c2dbaf. 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/ed62962e-f7a8-4441-8051-ea01cb68d542.json and https://artists.proofprofile.net/proofs/artist/ed62962e-f7a8-4441-8051-ea01cb68d542.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 0xc003098da08a386fe8ddae90bf95d6530f830ee4ab1acbed0ac988163a95909c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCADD1712015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3c74a68b2219470a8620aa694bb43bada2724fed189b0cdb665097b942cc4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCADG1712661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f72aea13a214d0435d1d1d64cb8046e1a7198c6b8dd1cf8099582ca94c95813. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADG1712663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2150c732e8875584ae0358544d235627de68283df90153f7d989c5c52ba7520. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCADG1712666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8980cfb43ef8d3ea7066ac90df31b482ea728072ee50704da43cde2a4ed1d89. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCADG1712543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906a2c6a4f719cb86eb5adaf6ee6e2cd3f1b638885a9400ea1d6fd17205adcc0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADG1712547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc10ad042224bc18a3d5119b5622537e802a34778072e3f8ec78027d9765000. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADG1712740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797281389144a46bb07085bab44b66c3ef6698e8474bf2ef31fb931f20fad87f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCADG1712741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db102094d3eff4d13324d6d47ad6a2251337ec55b5f619a21772697f0cfe14. 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/TCADG1712746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5731a2ea796eb24b559e1a8762092c884520418563faa3178efcaa005b6de6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADG1712906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e90104c229c77470ff91a749b87ee3eba3ff37cf79fe138a01ba2544a7469e0. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCADG1712910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040f196f77e0cbca06283167eba694f5ce78b46b435b31f7a687f7e48a471666. 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/TCADI1752347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f7216cc310b112a7c95eb24d457e798e5ab09d370d969e0713e7278a03c4c6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADS1814670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cb542c51e7a406dba440cf3cf5c0d2376d652da82abc068790ac4243af971e. 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/TCADS1829663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c13a1faa91f99a9ec23d0dfafa271d9120eb574b5a66f9de29ee415fc1fd35. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAER2065437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6c532d4bb175817ca60350f39f048b3d9aa240f19e921fa2bf730b8207bb7. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TCAEW2045286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abda16eca072e16f9e781e135e33c62a4b7202c14c422aaa10be67a9a363228. 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/TCAEW2045300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea767251f870f596b9a5f35fac648bee18b96de5261fd4e4c6335628ba677eb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEW2045338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d39e061dc48818f1067e47a775f080cef96c3884554bc2d3142650e50cfc65. 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/TCAEW2045362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6500c093c5decbd27e6dbf0a9bc77e766460d47f0bb96dca2be129a7a660b5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAEW2045438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dacfbec36e10f7baa8f0c66333ba089e7571a4f7467770bdeb0f79c39c93aaa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFH2047689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c47949e4e4fc85d6ce92905adc37f02885d9efb9afe439ae5ddb3cecd9573. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAFI2173240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54efe1d33f8a8b7c4796db4fc53473958978a8fc91cf33f80b78861c72e7610e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFO2165449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c7e1275715a2224bb5702678be9a51b1d90871a657f421919b0d7a650f664. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAGC2293764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd978ef614f308d55e6684240de68c979df2680f2d36d559836bd581978eced5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGU2334711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e32335f38642958a67efec9af08acab7dddc0ed27c62803ffbab4de5af38dd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAGX2338228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be84a97b03513b1478473f0876522579a8aaad1bc3cf323f2d8f4d0e7f4ba79. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHJ2377706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf582e00d988ed5df24a0cb15c7cbcc447ff4cf2f2af065443d14626283e1c988. 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/TCAHK2327448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dcc749adb6c03b925976c938cac27ca580617f5fc0e177e22226a1df0d167f. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/TCAHM2383889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ec65155488045ec745854ffef602fb76012fa60863236a6d8b6bea7ffaf5ec. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHS2363877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7243a72c1f819c0f935aca2ca3f79dba07697316ad05a7e3d4a6fc33d2d3de. 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/TCAIE2499765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb799ff430363d22c9bd20b4971ab980f2a356df1ed46c0edbfc0d8891a3b969b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAIG2490469.