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 0x835a505d76ec2f789b4ab430f031226ae180719d8a7c5051ede19f9304caf328. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/924660b1-f4a3-4447-96c7-29d777dcf08b.json and https://artists.proofprofile.net/proofs/artist/924660b1-f4a3-4447-96c7-29d777dcf08b.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 0x56ae005ecb8fa62c08340c148f59e747d54e423dc817e23fc3c2a211ac5e2ce2. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:28:15Z), 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/DEZC62594410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0d015dea4c52fef758900f1d5175b3cd4d3103d4132e3d717ed69839040073. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEZC62594411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875263e9ff15a93231005c5fa6abdbd8cb6de66eb8a84085dcc1613cc87b450b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEZC62594412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70362b608fb8def0fb7019a9436181d91664190f4fc94a23f6bf05acb320b65a. 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/DEZC62594415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb5396dabaf8478701368f5aaf8d2c807d193f81b396c3c57282fdbc1414910. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:59Z), 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/DEZC62594416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38da3e7e3f8a1a100e5059a6903a012907864bbb6314f8e4770d35931e566b. 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/DEZC62594419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d50ee966c112a8966e75a9681030a3319840f28e490f8d22a7e8be9d359c88. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:55Z), 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/DEZC62594420.