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 0x310e51920ffaa55b37ad6e04d154aae2a04c410fcc906894fe60aa215558875e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8c4a6a1-00fe-4586-947b-6fff1e7c52ce.json and https://artists.proofprofile.net/proofs/artist/d8c4a6a1-00fe-4586-947b-6fff1e7c52ce.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 0x6b65356ee9092a771edfdd1f7bb586fe073eb8306998a11e0c13c393b488b116. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QM4TX2479051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbcf79dcc319a388d973bc1b15525a25007b041814b44b183c7cf03ceea956d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:29:46Z), 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/QM4TX2479053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8410fcbccfd65f0a758819e6c1ee288377360d978e97770184efb1a31b3f4296. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM4TX2479057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b4888cb1118b7a99bf2d8a70849ef07655dfe97498288513f92e477cccbd90. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TX2479059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60e6457d1cfeffb86ae7d4216496b4283eb6988acc1a8feefddc3bc98e30d41. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM4TX2479060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeb187c5ba930b572d0c7fdf7a523012a8e6b4ad4f4a9dff82e8ba7624bdcb3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:24Z), 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/QM4TX2479062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704cbdf49e1510a677a118600070eb2c494808a4ee85622f53ae1c59174f64d3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM4TX2479063.