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 0x25273677bcc158a4062d051964bf5047f53995f290da33a9ef5c81d3fdbf4fa8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d981038f-38b3-432d-8fa0-739d4be84ad1.json and https://artists.proofprofile.net/proofs/artist/d981038f-38b3-432d-8fa0-739d4be84ad1.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 0x156354d3c2ccb2b27e3640aa9df0ab05ab87c783aead5d7144389e8c5a67c6cf. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:45:45Z), 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/USCGJ0832600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e813106b95cc9cca257cb6ed635775c70e5344259d6b8f98a7b48313f3236. 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/USCGJ0832601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf019568dc6e907fa14fd1ef8c888c6d63791e00c0eb3e9a8a1a6e69e4d2924. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:50:34Z), 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/USCGJ0832605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac274e3fde5bf82002553e274755e2d373f43cbe66b3a2f4c404ff6237a5a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ0832607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd02a070fab9bbf286eda9062d17006db30542caf1010c99f81732212acac4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ0832610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b928095bb4214b75082c3079094a11b91039d3671bccfb07973e4d2741bd1. 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/USDY41552727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08ef73b2f3f2cf2f9f4bbda16b993dbe30f6c828b62779e300ad8834ef9e555. 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/USDY41552728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b224bbb1ef46076523fb912c416fdb4d00bc5637b6e8c2443a73c44dfbe2c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY41552729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dde2d0c6c8c95187795009e62a9c84a556bfa52788c132c4f26ece59e04532. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USDY41552730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c3938823f24f5b97d5efacf153ab9789cf7edf7415faeb4256bac532cd988. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDY41552735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bb4d737ef645e9300acfa940e279fa5317ba1ddb1ef8bbc0b1b1b0aaedefde. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USDY41552738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98802850a4357d2479b3beb86b3f0bcc65cf1aab51742caacd395e9b84e2967. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USDY41591250.