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 0x08079c2a98335efd91da0ef7584be5888ff2ec0c43a59b6ef59774febabde2a2. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b32f4511-b5e3-45ab-b6eb-7772e6d80da8.json and https://artists.proofprofile.net/proofs/artist/b32f4511-b5e3-45ab-b6eb-7772e6d80da8.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 0x2dbc3d3d816dfd8045443bf08d2650878639f70586c654a1971622eee3e628b1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TRBRC2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739512ec6e92ff8f2380ccc379c2b8d2f47ec5d3f50fb19344f12f47b65bb583. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TRBRC2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e186113a95ac3a30aa7a0618eb0cc2379c3d5e9c27cead539d2a0e4908e0d3. 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/USA2P2344521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de4311b7afdde5961195d4930621f0b883b2c893ee99e60590199d501f5e77c. Chain 2 (Bitcoin): anchored in block 957686 (2026-07-12T09:33:47Z), 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/USA2P2339724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e186113a95ac3a30aa7a0618eb0cc2379c3d5e9c27cead539d2a0e4908e0d3. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USA2P2344521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746e09ce7957db39ad9033dbfa6a69bc8b201d63542cea6ba2f242ed15580ab. 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/USA2P2351697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb0927e8b713f251ae24ff40c390be28bda5040e4c93b63e07570d6ddb88c27. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P2317817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa911c75102290ef84d23cab7f089cf4881d43d68710a3647239d2cfcf7512145. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:26:44Z), 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/USA2P2351701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf995383dd2c6b5076f4c2a890c60e5efff98589a8d01993ee3117c9b7187668. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T17:02:15Z), 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/USA2P2347845.