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 0xc403d44482a98ef6d3a7ea7a2448804ee26bbfea1435518ab981a939e209a0f3. 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/e2566343-a14c-4818-b19b-dd099a35fab9.json and https://artists.proofprofile.net/proofs/artist/e2566343-a14c-4818-b19b-dd099a35fab9.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 0x1101448c1991f15a9f789656aa1d19dbd78f6c0504f49dae778668b974c48f13. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFC2097127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f0be57a5a11e84380a0fddb3baffed8d7b7e3b514548db44f595776e2aa7f0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:35:08Z), 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/TCAFH2026457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3197b76128c4920489c74fd3d414eaaf4401a4a165bb7e69701f4a1e60f7b90. 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/TCAFC2097155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc50249374f3619703d7c51494811e54d11b0990dc29d84aa47774dcf0656c9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGH2277392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757ce56440f9d6536c5f0c75c8833e9b9fb1fa203e7861ee046ced4cccbc545a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:34:48Z), 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/TCAGO2248338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1167ba3ee970645271e0290e431f2e27024709941d1a07b8ba8e3dbaa800b0. 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/QZ7R42352713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e7556718557d19da8727bca5686c79e2347882a7aa6a0d3bdc41438004f0f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:16Z), 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/QZ7R42455565.