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 0xf22fd2a97eca6bc2c21bc7f9d68241d76dc5a01586b846e697d20b98946842cf. 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/970b7f9f-5079-45a6-a5b4-97fcd167bc45.json and https://artists.proofprofile.net/proofs/artist/970b7f9f-5079-45a6-a5b4-97fcd167bc45.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 0x143d09e2210b8d87d0ba69f291cee78c4b42f52341a112f4681f45d55b78990c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:52Z), 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/USAT22101289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b01ecb898bcfb208475fe73c27b1fabbc2bf92a87c289c319cdb49d5b3f4a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:38:36Z), 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/USAT22100667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815ea701cb75d32269ed9a63a9978f618b0c99ba443dbeea6d65956f8d13d74c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USAT22101291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dea29ddb2df446840ac9900e381652c25d8f38285aeab835fa18688bfef18ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USAT22101292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b57a7077cbe3c46dc169a6598e5e2701edcf018bd2f2046d75d0b5273e4c004. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT22101472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6ebe2320eb15161ac20de6b877412943b9f3778de7ad534fa29bfe2de998a9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USAT22204826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae72db2c24f089235ca262ae9c65bfa5c7b3e59f27503e14e81be02af893795. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USAT22204827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5fbcce9f34e8391a6f813c8e3fd03565bc7626a71d1a52b2795ab89f268d5c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:57:23Z), 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/USAT22204828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944fd4339187d90dee8f14d54e08e5ebcb5698c1b9cda1ed5a116b6d083be273. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CBDUH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dec2fa89893b73c6d05458e2983c964da56fdf00245cc9a679913b5b80e80e1. 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/USAT22219582.