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 0x165113f6180807683664703295affdee6d8d49b8d7fe6ea2f2d76d3685d0a12d. 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/ca5318c6-6fdb-4fa3-8d4e-46cf0716c985.json and https://artists.proofprofile.net/proofs/artist/ca5318c6-6fdb-4fa3-8d4e-46cf0716c985.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 0x0d4bf52e8b09b6dd8ca9f63931b534deb150996b9bbace5232cfe10fe50ab3b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHA2398320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd354d1c5973f261d9f7d579cd328b940f604fb21d9e581f24b8d6d3501cd4155. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHW2449091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa99d937766dce59ef571c7789d70d0e5f0cf12d5602922fae3ef5fe51ad8be. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:39:05Z), 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/TCAIG2463740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015c30599aa7c02eb9f059b15bb152ebc7f0681f9b0983e2f8a3e98a06415f66. 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/TCAIG2463795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf287eb46a4c8c23b2292a18f557626d89ec4ba35f8ed7f25eec8cf51236b4777. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIH2463824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daf9a53124df44edc2df057b7e538c4087cc7956fd8f74a3bf5de486e54969f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:51Z), 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/TCAIG2492383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0243d8e38bcfd277a285c49deac5ca2c37798e403e591eb07d8e626d8e24ff7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:30:50Z), 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/TCAIH2492395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bdcab394fb7978a32d9715ac596a534f0a293572547140f25ef427a2a954cc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIH2492409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3905f55d35c832e980bebd5931f0a1aeba2d1aaf92e6214b33494a91665d5576. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIG2492418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33daa0351f7d16166a6e0ae0a5e8d9d463a86a9a6db1601a4ee75c5e61a218e3. 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/TCAIG2492439.