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 0xfd05f4de3dfb5cde23704945c6255527f4eb5997a26d7ea47bbaa16464f6ee51. 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/8b6dc6c8-c29d-43bc-aa3c-c12b62f04ac9.json and https://artists.proofprofile.net/proofs/artist/8b6dc6c8-c29d-43bc-aa3c-c12b62f04ac9.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 0x49b873e6b76c7e3494bcc040494e052033ecdd62a7a25def5fd49d18d07ed07c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LTD171900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c3c0140fb93fa58d26635949f5d44ccd3e3c4e937b02224976121922b18b9b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LTD171900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a18f41eb210448ae94d64f3105ee3e363c0a29af68dc3a3d1a7ebbe6d4e9b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA71926471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2022bebd4180cadd82bf19dc9b09ceb6d4e79b0e2815012728e25b95cd0fea9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LTD171900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11605052e7cc862fafe1f228977a05a93f105e4cd1c29f30bc2202018471fee9. 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/LTD171900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4da87b8700817de157373cb78ade34e9597e07072cabc62aee50e580d9101f. 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/LTD171900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2edaec717f34141999113913ede83d98311feffe4169f552bf2719fb5839e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LTD171900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d144c39550ef5ebe6f377034a95c8bfbf2177210fbb254be0c29947a6d5f0c. 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/LTD171900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161479755e5b064f56d67d471bc495529bcf7ed850decbea44bc979e4b680c5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LTD171900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6f0096b134f99008e04fda9b92d4cc8043581ba3a6160f6d280df198f99cbc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LTD171900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b14a376017ad791df19908577f0889544191b1dc0335cd771aa6bb32443615. 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/LTE471900007.