upright=1.35|thumb|Map of the British Isles (c. 802) upright=1.35|thumb|King Egbert of Wessex (802–839) Year 802 (DCCCII) was a common year starting on Saturday of the Julian calendar, the 802nd year
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 0x69d4bf03bf1115f3c1a8765246eadb38b11eade4ea327ab58aba52e320f23b65. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6478037a-f9af-47e1-b276-6905376be852.json and https://artists.proofprofile.net/proofs/artist/6478037a-f9af-47e1-b276-6905376be852.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 0xa232275a093a40fa300c664f6438624b015a9c968a0ae4c8803807bccb521daa. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DKG1T2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75122a6a46a62417e7b5ebf83d1bd2ae7d4d74cb9af2470e4a9d55f8e3631bb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKG1T2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742eca62913780ff8d7fda484a6a47bd58c136bc211a820069fe80f78fe0bbd6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:25Z), 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/DKG1T2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8b3cfa3dd8d9a26c77b6a22baac66ef89d52ff19e8487f62f4857fc1268ffe. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DKG1T2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ea0f98eaf864734b46454f9d7793a600437cdd61500651366891d2266ab9cc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DKG1T2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c27d6a43efaba29eb34e40efa2877f9f5e7ccaa5176af28924df8ed0abb06ae. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DKG1T2500201.