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 0x24172c159e5821c2280d93a428d03160192e0bccddc8ade8c441e522f8860188. 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/7eeb0731-9fed-485a-b695-2cf6e829806d.json and https://artists.proofprofile.net/proofs/artist/7eeb0731-9fed-485a-b695-2cf6e829806d.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 0x67f2d0344530725a18ec6290a5fcab9d1be87f0143e9872e08839b20d4639c17. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/NL6TC2302002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51449faeefcffa3b441b9e22eca0c97862618e73df25ffbfcd4ccc0251fcf51b. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NL6TC2302402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025472df96230ae836db0ba9fe231e4e1278d9c94092dec2f794bece212d1aad. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:21Z), 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/NL6TC2402802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057238beee9a4512c57e7020ac040e74e8d87a9854bb52a59232ff58c0d6f45b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL6TC2403102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e7eb6a59ebfc8f7aa2f0a54bfff7abbcac71795ffbcaa9d1a841902d8f971. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL6TC2403302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633bcec397cf4a97ead8031be5e71799f5cefca392b8dd8c246b179466fefa33. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:25Z), 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/NL6TC2403502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3fce72bf213c2fb08f78da0f561698074bcb87b341f56026b5f2cfbb9724d5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:12Z), 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/NL6TC2404402.