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 0xd3d8ef35bc7482bf0c2df50eb3aab06fe428b3c6ccca6651afb9af5669abdeb3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1e11576-d916-4f5a-aaaf-64eceb32157a.json and https://artists.proofprofile.net/proofs/artist/b1e11576-d916-4f5a-aaaf-64eceb32157a.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 0x73ab95212ca040bcd81293539f099b60bc9c0822d18fc30a4febd502729fc8f5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZHN92396973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd521c03eb56bf82fa76e05d4853abb0e0cb8fad9ebda3b30bf9149c403f102c5. 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/QZHN92396974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfe6bf3889509481f729b390cb0ce57d9d63f385224fadf8e4f2afe895228f1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92396975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe740371a537a24632611604be43afc7e80f6b115b6c179077345ea74e53915d2. 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/QZHN92396976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357aaaa5d90df0dc579cdc361c75a82c217c7f078cf440a469ea871ceff5b532. 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/QZNWR2308884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bf9d3b12627b8b4ae1e76281eaa7edbbf38050dd065c8aac9d1802aec48aaa. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZNWR2308885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aaebbc87d3137a23fff1bc7c55fba31ba508755f4a82120e73966e26381231. 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/QZNWR2308886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10546d2026015125786950bca36a156d52c6488b2f69c4ce257342608b54fe97. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWR2308888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09648fb5f74c4f96c054949b7ff99b3443a312d11e30078778588ce5ef84fba. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2308891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3e0af61e36b91297923dfdd3354630bca3e43f9f3d633228d90966bed600f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWR2308892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be100bc226964f1e80d9e2572a18a16c2c0b7257848b7946242846e3cccc80. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA62497908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ac23ad68472cd103855e4fb084ea261262d8945f1211fcc6bc392819c790fa. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHN62446398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e825100f63400cf8cbc53de33eeabbbade2054df8b70db709c7d8ee71bcc653. 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/QZHN62446399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e897fa100387652aa2aef18d78b3374a9d625bf3118573e4e5a43b7cc075a0. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZK6Q2474468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a5bcbbad558fae2a3808202f59472b4b7992d22d3d77b9c4a052b22d3bc742. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GRIE12400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97b97c8f0f499bff4e678c0df0b74451b86764110f6a391e66973054df18229. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/GRIE12400101.