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 0x9caded0bf3c3f89b02ec300f0a61a8f5cf45b5db12c588b07d8b607ba72b2957. 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/23e7ebb8-7477-49fe-9580-982f15687031.json and https://artists.proofprofile.net/proofs/artist/23e7ebb8-7477-49fe-9580-982f15687031.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 0xeac8088c908191bedc971ba6c70ba3dba2af5bdd03ac6b4268c2399d6a28603c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282234887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15c592258456240ea55b47fa45e72dee5ec2ef412922099fa5b3473a818f014. 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/DGA072200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86234b8ea96502fe0193dd0f6ced8ad4782c796cf986f835b0d2f55025807cbc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:01Z), 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/INP1P2400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7e2ec615c2a83d03b8cb4d11ee92491c787902c5e53df92c062364ef4fa2ca. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:18Z), 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/INP1P2400550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a35c0a01156f8f625ec61b8413a2522bb4110575594caa94bdacb758ea8631. 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/INC932251082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511cf8f0c4b898b091cc7ddf6abdd38bf8ae375a341936ea3d62ba41fc131d2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:47:40Z), 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/INP1P2500082.