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 0x97bf7f7462d9e3830b0a00ff859cf6dd928bb0cd2c4c0ae989c706c51c4807d5. 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/075fb431-6665-420e-a4b2-8086ae6f4e71.json and https://artists.proofprofile.net/proofs/artist/075fb431-6665-420e-a4b2-8086ae6f4e71.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 0x35a861dbaebe1abbdb7f7b46aef28ea8332cd5b773801858aead483bf423676b. 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/QZDA41953995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981798292cc5c583fa6c6e5993534783de04967224866b3923923275208fb085. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:25Z), 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/US7VG1990727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a35a006234d11cf5ff15f7f7d282231811a409ddeb89e34521850199c15a32. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZ93L2048685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe77e45a1ee2439e31026a1fb426ae98a18bf0a6a14566600613ba25c240d003. 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/QZ93L2100865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c903ea7cbacff5d3505d48842577d3ff766a140da1afb49f50f764a3872ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2284651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1ef3e4a3a503f1b7392eb2eb5b8ff32bac830dd246119c5115c0c7b48d3128. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFYX2377839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb80ed4db9ccc048c40a6374b083fdfb6979cef6a930f1a18819034aa99c8878. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:22:14Z), 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/QZTBD2334095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9edb6f1068e94016fbd52cf1432124830c8e6870b57097b456766db0eda0c. 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/QZTB62536652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfce87e91c9886e899841cc62f361bb7a221ec096e9383e30c13513e4a01739. 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/QZZ7L2540476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2b097a875db78f670c855fb59a5b5d5c99a71c2ce4ba31aab019ee197aa69. 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/QZHN51972197.