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 0xbd7dabb109628aa1511cec211d1141989ef58cd201182ad9c6d2eed12af68634. 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/fb67dd13-f505-4fce-9d40-30e532412980.json and https://artists.proofprofile.net/proofs/artist/fb67dd13-f505-4fce-9d40-30e532412980.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 0xe375a7fc9941745e36594a344e92fe7dee6aa152b16870adc54c5a9b59fd40ef. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ8B2411424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edad136f986f71145b3f6c5308cf71c9eab5e96243578a396132885d7f753a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:37Z), 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/QZZ8A2497733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abc98f33fee2ac86be88df5cdfa66d08b47ffc9f0e8bd97e84f65bad4be1dbe. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:34:32Z), 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/QZZ8A2498029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae2289f680a696a0faedff10cb014861d6ebee5dca5940fab2b33b654909f6f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZW9L2418399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4291c573a541db4cd8edf384247befb90d153c5d0e11a61b243fd0c5c9f75d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ8A2498255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595f631f21c34d3b0c444bd0a2a3e5ba8bcb7e52f5df964ee4c708216999f67e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ8A2498317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f4c7dfea6261137d6ee0072cc03b0e5696d0301297aee0f0bf5a4c0bb8ca90. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ8A2497156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401feb3284e780809ee127ebd830a6118d8143d821f231242c330f22b5df9a3a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ8A2497192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d5a6077c1308c3970c891567474c9ff3325d84c5019f9bcc9013a3a9356fb8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:15Z), 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/QZZ8A2497218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e93152abbb2670fefe820dcc003b2167054d43801d6fcbd5981c0c99485ef05. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ8A2497496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef90cba08f095d95cea32bbb561d240e9eae0c102d7b9f432feaccdf2e4d6019. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZW9L2418455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909f80e0a6200e1bb8fed9d1ca194b52bdb24ef66ab740ed3f9398d12e91273a. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:30:09Z), 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/QZW9L2418397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9729987c4004fa52b0b33fa50dba8de0ba994154ed2e731b8904161841e8f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBRKQ2575762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd45a3911f154defddf37c45008c292127ac08951a083d7bbceb39d3ee179176. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBRKQ2575768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd694fa03f30cf49e3dc6be89e02fe4af5a678179b2be7323b94a20934f28e2af. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBRKQ2575770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc32a8f9281d72e489c25cd32b529ea1cb3afd00be86bcf45bc6c94c6f687e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBRKQ2575774.