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 0x90e21ef8325abb10d79bb62f5e135ad6743ba00b3b39d87d0a78ed386ff97a80. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4202f750-7de1-42c3-abd6-7ed9605dd71e.json and https://artists.proofprofile.net/proofs/artist/4202f750-7de1-42c3-abd6-7ed9605dd71e.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 0x1df1adde7f1b0e2d0d8e82c6167dca9fb9eb6319eae590468c3bb1bbb17c4a50. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ZADQK2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9ee27bbbae77978979f2bca6a8b51b9ae26c71522d6a45d82c34169b8eaa5. 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/QZRP52363018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a73ed832d81dee54cec24e34d46207be01b820a84bf5b85ad63dde75a22972. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ZADQK2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dadcca1e62fe2e80579761f08a4a63165dd4b42bd83798c0079817fe8ecebb. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ZADQK2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f17098df361f801dc0d918f82b9b68479ac0bf947024a899cb72c4466e4d2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ZADQK2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512651c66c10e10d143778bce52d2ca72f745a559db1aa8ffaa2ed5814cc9657. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ZADQK2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b0da76d9a4f3f15afbc4cf872c26e88b413f32781e317b9933cdebee92065b. 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/ZADQK2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95503d5b8ee1c568239f627f5c1c1a7e3cc108a39df6dd4e3ebf70124d757159. 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/ZADQK2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6033d849406deb46609374e3bb56f0795cc2d2485cb1c3057cc47cfb4f6fbd. 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/ZADQK2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7589848a2e91b21d9e1ec8bdb9a96bca83d8db62bc0101da15b9075fb46c95. 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/ZADQK2500049.