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 0xdc21c8b0cb5ce75c252d4849e0ea9bf236108028cd5143c3a9006ec4c4d1b3b3. 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/cc32732c-78d2-49f1-9d35-0da0506621b1.json and https://artists.proofprofile.net/proofs/artist/cc32732c-78d2-49f1-9d35-0da0506621b1.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 0x26692c2fa362f230a6f3f382731e4e07bfd39a373f9e42cddbb3ec053a8970fc. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:18Z), 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/QZS642454099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9c2bc14931d4bff5a0de20e895423130383e183a422295028c1b61137338d6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZS632498263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b57ed1b37c9e4a3b3e9581f5cee8811f7249c8316c69499038e17ff20d405db. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZS672458319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff15a19c2981c255ac615ac09be4754e740311a34e7a7e707fecd7078ebee4d3. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZS662433619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ddf4087d2ff36cc3627538668c65e2dfc535e1c6de1b64591b72ae3a5d01e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:02:46Z), 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/QZZ7P2402843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bba604afbad78ef009d4b6bfdb84a70de0a9cb4b44dd16c8aad426337900a0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7V2467548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac548da13b599aac9e884e731bfd0f11d8661e836c21da37e3093caac2a1091e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42513876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807206004fad578283b385df9ac7c29777155feeb2883185766a8745ab64e814. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:41:57Z), 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/QZDA82517060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76053613c8e0b8a3dd605b8bbfd2ef1bbca832cddbcbec71f7e8c8afa1112998. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZES52568136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d29482a87a299e982f687d5a7c2139c35fc453f2326be51aa9121d30f1e7476. 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/QZHN72584121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0638487bf88af33eeb5f346e7fb826fb3a74d859268a444bc0cc0e98bd8918b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6K2598250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9aacf46e538526fa7f22b0eda8bb3c7ad8cc2d9f26fa250870169484d295a3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEN2559114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f23b8f21beedefbc3b718f09a1fe82c3b021980349489c198a42be24a01be2a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBA2578202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5753b9f3c04f348851c0be7fc5b5edfc541cbae3672bb44d533d21331f70835. 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/QZWFT2592036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb715d157e78e66b71716e7ec1636c42d9ff58a978b8b40c312e420d5d3575497. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F22532164.