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 0xddc4578e97d3e2ba59c61dd4d534ad10097e63db38f6a31a4a7eea35ae9e4885. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2587818-4496-48fa-bfde-e34c01498b71.json and https://artists.proofprofile.net/proofs/artist/e2587818-4496-48fa-bfde-e34c01498b71.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 0xc0944b94349268827d6d6baa1478896ec5b966467a37599c77368aa388615ca4. 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/GBSMU0030180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6203afb4d4293c7d53a3d15d251a52c94b696ab5b36967a4ee11c5aca87ae2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:48Z), 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/GX3HH2257369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec06e024bb72d32f67c0c7956094059df547444f3385ebcbc38c2440f1d37cd. 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/GX8KD2384958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b88e20cf75ec67aeae7e821c73369ebd10830641441d098f65a5dee2aec78ad. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GX8KD2333574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90fdaa61dc9fe8afbf9afc417637550e073a95ae3c052a1a94ca81f943f8658. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX38U2366622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a73685e67239b19004d5ac0796c82c4036c045b9ac28c6904278b817018221. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GX38U2398048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa670ac84a298e9de0628ffc15494b9b7434890159958b0e5ffe0edba3c73c6db. 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/GX38U2340779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e82f53ed7e162ac52a1a998e1bf3a9555dc7334434bbb51e92b8b232676c7d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX5MY2302955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354371476980432f0198ae645a1244596b96dcef44631b176f7debcd73e86d10. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX89G2440522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76049d23b41f0f83b9a87340ac7bf51376537ccc8ac33c52389e09fdbd970aa9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:13Z), 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/GX8LE2447051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94afc95039fa118c102d6d2abb47003a9d1a729b271225049bc952834757ea4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:13Z), 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/GX8LE2496271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af7a5a35c67e2b3f05a060584ce2110a6eaa6cccfcdd7193aa3e45252a44e08. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:59:39Z), 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/GX8LE2485788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d171cf7cdaeb7b82d2b2fb8fc875cbc15d807a1f390ee44878bd49e31df61e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8LE2465164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2550be805c6da77bc05ef134a8a3e3bd0c3883fcfc1770dad8787630f1608. 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/GX3HH2441256.