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 0x3221aa55c0c1698b1a44c7393647ecb3cbe443ae8facbb11406216b9e7f48d1a. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dda117b1-9ddb-498f-ba9f-e611cccc55f6.json and https://artists.proofprofile.net/proofs/artist/dda117b1-9ddb-498f-ba9f-e611cccc55f6.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 0x5979460ae62d5c1699fe4f62428032e7ae6ea38ebc47bf23de1122f02efdf99e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/KSA002202445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c07f6c652d4d01a744d16750b8d77073e688ae15bcfb190c9ea1d8b9762d4c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KSA002202446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2c2323cce7133a7987e01cfbba0a28dba1ed1897f7651f6197c17b55c7266e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/KSA002202448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c60dc3dd04977c922094902e3ee781bc7a17fbbb6031295028c1f8e9c165d18. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/KSA002202450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f95cc5d3a97f5122bbeeb19d8f473b0c20a092f7220b6caa30047497214aee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KSA002202451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9786ec374e52eaf15f19e370a18d746689a8f91f8d283ee9b97b5cb8dc72b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/KSA002202452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b7ecc29c21c5a9f1e536bc5106f0712f8c6dc54248e607c64842612826950e. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/KRA492400814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87befd7bb53b940f536ca73699044a7eb63ba8504ee9e83fd87672cd91955794. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/KRNAR2228311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b6a40cdb3b852e0833495ab79215dda9d8ded2b425f19d4cd8ec6a1072aa7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2247720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c70e34110571210f634f47b97afe37cd42838fa78fffb412d1a116583500a83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2214152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe092a3625054e7a707f06930f7c9f4fca39f199484dec7516c882bc35afdafbb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/KRMIM2214153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5ce951dc7dea24b89e69ed88dedca37b2b9db1422d6965518fc3a2ed28258c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/KRMIM2214154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9067a2d1241cf249c64b092e6981c13917d2affeb667210990a37081e50f7f7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/KRMIM2136333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ade7fb90de1f189ff73b4c7d029eff388c014ae08b3e3a74cb5913172934f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/KRMIM2130818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8caabfbdae790ec662aa7ac65c1e6b56ed86a4e0b7a57e0c3e54c863def839. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRMIM2121014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67466505dd67c36b90c80371034d9dd0fb75831d76d18f905b5445378abf4858. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/KRMIM2036353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c8dfa6c99eee5870d86983430611ce3ee06c2d7f31404edd85df291017352. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRMIM2036355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37a13726894c016f4efe578c5cb5d3d23c7769b9041867c0eb8b70ab4113ede. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRMIM2028941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4db6c0fe1c8730fcc2bee487058c4028d003a32e1f9cdd99c2856fad109b24. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRMIM2028942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe635aacde9031b0399da7fcff686dcde50b789ef110f2d09d07d54cf0248a01e. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZEKE1920002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7e73e22e84d775b1e87300a0cb11f49170253cae6e533544b46b07e1279b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRZ291817681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccd28d99ef4abd1145a8089c68324dd95cc4b8e44d25a3d70a83a25989442db. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRZ291818171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d60e880b7141335f13484f56d7cf1bf1f5e84750431458435de3c699e7276a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRZ291816245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0cb675daac0ab9c4d35c1bea7231ce0f91602bc22949c767ebdcfdd96925c8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRZ291818174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8dbb591efcaf26bd0a5592b9f78c0c96cdab745575970bab0dcfc8f14043fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRF631900758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c545db3aa55024da08210623a17b7fb2c6b30a8d36e25a8ea12849a044a1ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRF631900759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2357142381f57732b55205a0b2e60e22bb4122e2bfafb7e466db99b4ebc623e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRF141900013.