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 0x5e425fb4bf24521d1b18fbe619f85afac79bc0d6aaab538e6f1ce92579b442a8. 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/e3c53b5d-3972-49a5-b12e-a6d0e39f6f73.json and https://artists.proofprofile.net/proofs/artist/e3c53b5d-3972-49a5-b12e-a6d0e39f6f73.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 0x99c96b60f57821451e444981db903599f466fa7a8edacfed54fcd356ea6e19da. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEP2073611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831c8530ce4ba20f3dd220a8b61a84a4b679cd5d0791393b06d853f5b0308a70. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEP2073614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa392d9d204d2e6f0d63a5e1c6ce566077979d4b99b4cd99e2586c17659b3fe7a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:35Z), 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/TCAFJ2101656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf1b796270c98d06ffd64f039e9afd8b69035a176a45c586ac1a287eacc532. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:15Z), 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/TCAFJ2101666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cae91355e64e2492000ab1d1101cb73967c500a707c445f9bf0707e79f8b35. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:30:19Z), 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/TCAFJ2101683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46f3c3b77d14b03862178b546821a0dd0c86fc98c730dcf12812d656f4ae2bb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFJ2101685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c5ce095385a73620a8f0edb0b2e68424b2ed901b1cb1f63f3034177a967244. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAFZ2290779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e26943b531752610d1b2897e6c81d309ef946c519e07dd2ff8a46132a0531a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAFZ2290784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea8f07d79ed91374dca4225b731954eb512fa2ed51e0f35e80f0dc0a5a34d6d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFM2138569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307f9642358adbed591ea326ce711107fb23b3e92bd103797b558f0dbace4cba. 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/QZDA52410209.