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 0xecd194e48fa1ec8d669af6deb67e49aee994c58f10334f3cc4a3811cf658abb7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ebc0f7-d04f-4a76-82c1-84630ab938e9.json and https://artists.proofprofile.net/proofs/artist/a9ebc0f7-d04f-4a76-82c1-84630ab938e9.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 0xaff561da8251dc468fd636dce0cfed6df0c7be882584ac27750da22be3c1aaec. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/UKS422200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580389535270bbe0087c7f7c74816a3058b345b1268b8ec190ec41daf688cd90. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKS422200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cffc72922c9b652cccd3380f5693c5c754fae1c5c2cfabf07d2fbffcaa251e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:22:28Z), 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/UKS422300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cffc72922c9b652cccd3380f5693c5c754fae1c5c2cfabf07d2fbffcaa251e. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/UKS422300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22daa121c2800b68a790956fa16ddc3d0ff52352dda879eadcd6754ed33a7d1. 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/UKS422400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e50461af27d1ac0b813e997846bebca44df64bd7cff7637b97e3b4e2356b7b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZZ7L2425241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85793736a73d1c69a16dfccbf41ca914da01ed76791a21bbf778e09e45905c79. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:51Z), 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/QZZ7L2425243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8cbdd050b7fe550115abd229b93c65c299a3d504686bdb8ea4e863cf9a0f62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKS422500078.