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 0x9e8fb68020e517c835582061f680c8df9554ecceedb48d595910323a45d5f12e. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8510f840-6d81-4037-af09-10b70600d20a.json and https://artists.proofprofile.net/proofs/artist/8510f840-6d81-4037-af09-10b70600d20a.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 0xcfdbb827d752de1effe4965acba84d681500aee32cc17bd59072cce7bf0ed8dc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:39Z), 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/QZK6G2128844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132256a4cd7fa65527b085db97a01e8c574b0341e66836a5e63853113616feba. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6G2128846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e756162ca5801d6a7bb6aa48f1975f178fde972a1f75fb8e8a1a5970d46baf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWW2148728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7046b1ea381f1968d0e6583e0f62a9d9b37c23f8ba8605c933b716c4f9c0ad33. 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/QZNWW2148734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ceaf67b85fe43e5040d3e275212f2dfc7247ee719915936dd240fa3994be8. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:35:45Z), 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/QZK6Q2433228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b3e741960263684250a89610d2c7e8ccfe40f8fd6833c8b7329b80ed16b2c3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZMER2471972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee8cd1bf40529a5f8a19fc9ffadd0db81962352c31b24aff8ec2349788a1e95. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAT2447920.