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 0x64bb9e9c4b9563bf4e81c7944ae6fc9b613cc7abe3f59f4cab9b2612e781b8c9. 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/c7fac332-5f48-4216-9b5d-4cc3af923142.json and https://artists.proofprofile.net/proofs/artist/c7fac332-5f48-4216-9b5d-4cc3af923142.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 0x1783f257a0f4b77c8fed9f48297ca07be17b6726cabb9d1239bb03c111bbb93a. 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/TCAGR2263121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641974f5078cb1058a59f657758bdee7780e6b3a83b647d6c1a2a2134c6ef5c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:25Z), 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/TCAGR2263185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7501d92951f7c2bc8ff886f5ba6a888ccb45a1d988e0366e73bc0354cd444c75. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAGR2263221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2646f4c38269f93db218622c1a6588629c69983c241256db67fc3a7bfe98e9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:15:45Z), 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/TCAHN2309122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ef0ca66ad7ce5b69cb35f6df935457d564a2ad718239ce0817d5c8cbe9426b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAHN2309146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02138af2df3489884dfdced68caa58b2fd253ea0cb91d4055d25c03fa1a5fc53. 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/TCAHN2309153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2122c3d24ceefdef70d1542a55f52c50c5d3200d6a448b871300d498d194d140. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:35Z), 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/TCAHN2309166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7397dda0870db2669cec0d28b4b3a68bf141d12c88e53e336b1ba4363806257d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:05Z), 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/TCAHN2309244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cfcd2e507f05d704252b943bfe6a96e4133c1f960c84bab2ef839e85c3c4da. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHN2309257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d8c6fbfd8fdb9b8003e2a3f7157cba9542ea13ee4505bff2add448c294be6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIV2460834.