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 0x55b49133a912a5b0105cf84b2c6d955dcbcd5cf6d333fccf4aa2f245f238060d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d808fd40-3eef-4f78-8f42-d1f380f4ef42.json and https://artists.proofprofile.net/proofs/artist/d808fd40-3eef-4f78-8f42-d1f380f4ef42.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 0x9f3c681f155d059d5a3e7aaf01c73fc51b00981b3bd7fad71973ae6232d0b66d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:27:00Z), 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/TCAHF2369909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3d73ae66b525512f89bb6bea870a443bc083f8040392bef8ca2c866721e546. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:25:51Z), 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/TCAHF2369912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367e365fc6e468b91fd12beff0c80a259a4191be357308273bf8d3395dac8d4c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAHF2369917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d27d73cdc6c450b75cb9bb5733a9f1adc78dd0471a5a03f6adf8dec46c5356. 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/TCAHF2369948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490b8b581a9b98fe765ab007c2843ce7811454d547a816340e1ac673cbd90cf. 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/TCAHF2369978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681e17c6815b51c3fd31376f1741e0cdb248e0f344d9591eca291beaa6d2d358. 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/TCAHF2369991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403385d83aa473e23abda5d606e89af9c7577cb96b5ebaa5dbd20f1f902b79dc. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAHF2369997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf46bee2312ac3fa5b5101ec8daa9455d00455a277f39a7f1307bb687820658. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAHF2370020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd35a0fcb2b8709f1bc625eecbe4167c8a96ac6b32e7679353c256ee5892df65. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAHF2370104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec7c45464abfd06689901fdcc091dab4dab88a847cec125c31df73185fc9c4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAHF2370121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd8932ecb4717e1f89e1071c8bc1d534fe7e1a64bffb4e213ac9137eced923c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:52:28Z), 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/TCAHF2370127.