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 0x9bfa50a6d00370d4a2588d2630c6dd6efdefdaa7421b97f70baf6fbf9af8d01c. 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/72f2e16e-1bfd-4897-a0f2-de35a7b43777.json and https://artists.proofprofile.net/proofs/artist/72f2e16e-1bfd-4897-a0f2-de35a7b43777.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 0xd7e0fbd1ffb9548577da24d37462a803ced2144cdbbf7b803e69840c8f501117. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCABU1426425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe987e6a282e706ee9d4221ea525cdb25783cc74cebebb9fb3526840440cabd08. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:56Z), 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/QZNWV2428491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52634987168e7a6cc567c9132f1c083e67d439864e9d7532263a90e1b56675d3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFE2416095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdb82199c837a888722ac28544c0b2545a57568a6767c5113f186382babee09. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:57:41Z), 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/QZWFT2463428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f77b1212d3d345bad4fc93283ba6ce55703fd7f1bec353310f4e4640d94268. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:20Z), 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/QZZ7S2400899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde29c5470f9afec4aa9aae5a8cc46221d11987a0a6cbc47072ac5736a17f56a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFE2414688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeba5e1f8ac306f7c5b445c66b64db70e30a865b5b9edd54f6f7e0268595cc8. 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/QZHNC2573358.