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 0x109509af6116fc1e8af185f09be4ff5aaf99a215cad11277f7400228aaa526f4. 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/5dedacd2-4a05-4033-8c82-6fc583182c56.json and https://artists.proofprofile.net/proofs/artist/5dedacd2-4a05-4033-8c82-6fc583182c56.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 0xef29b63418d9ca32cc2baf81666da4d0454744c66d354d38048a2b9caf2559c8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USWB10504585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96951cba69a311b0fec13b628d243d7c2077380d51bd3f40934842f8ca978e0e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USWB10505473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1f0f50592b9921489aacddd5fce1dde8d050040bf41bf9f6c3009df99e6dd0. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USWB10504569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fa85967e557f60d3e60ec557f1e0e2ed461437c7e137e1507e6be05c8bc23. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:57:58Z), 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/USWB10504587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854dbd12fd63a553aa58b3a5ac58f7cda44ca48efff8309d2f20b8796dc2bda3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USWB10504570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c0cce4fc856f6e7c6c3fb6c0dec3b8cea54f3be79072375506e3f41858686. 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/USWB10504571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df52cd48df447afef875be0f718b774decf63ceaf4377f450976915b7cf957d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:05:24Z), 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/USWB10504589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9753217d473078e40b98be5a4c333dafeff87c9f06d68c1ec41d811f0066d5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:43Z), 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/QZQ4X2500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fa85967e557f60d3e60ec557f1e0e2ed461437c7e137e1507e6be05c8bc23. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USWB10504587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203977510cf02a5db8bba64244d7647b05e303b1b9355f94945caec13ba0df6a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM71903437.