thumb|300px|right|Diachronic map of the different empires of the modern era, during their existence. An empire is a realm controlled by a monarch or other official and divided between a dominant ce
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68aec4e85480911c85ea7e264f82c3400776d8a2e2e285b761bfe3641891d8. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/330ca947-5f5c-4352-baf5-bcf9a7c120ce.json and https://artists.proofprofile.net/proofs/artist/330ca947-5f5c-4352-baf5-bcf9a7c120ce.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2faf6fbdecd3fa9551457c0ffe9b0c04b11d979db76aa8d88cb6630f42c5c2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEUJ61700191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39a384707335122602da05052328d294e24839b3daa267980233d709d4b7f30. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUJ61700192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762bf484dbfd095c2df7d13edfcfc9e1de7ba9e335d5829d042596d50c19d104. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEUJ61700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b981dfc03f1a5b0c6c12a632ef611a279b4120b268e4a9111b638aad061bbbe. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEUJ61700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24195c27c6d8487b44611fe9c64f37c2c06f46da26b44965e69ebf1d30dcaaed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUJ61700152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbd65eb721ca6e873edcd0a6cfad9986b2cb55d24a4b6189cecd868d9ed3baf. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEUJ61700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58db6f05b66b34b2ec27394ee2c0f0065531aac9d1b7dde0d6c3effa674272ae. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEUJ61700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f31428434696985384cbb65155a63adad2fcbdda47bfe8256f6e887fd32d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUJ61700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e550eec02bb9459117d29f5a207961a7144b29cc5f24eb830026b815e67b8b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUJ61700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7c387ac9840f2dd767448f85f6c2decb84b5ccaa3dca3619d7c9ac34e5618. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUJ61700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51429a80467be95b070c572448979fd3fdc6d519e5d34e05592ea0c127818db0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUJ61700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90180ecdcb67fd3ca71a451a4433dd9a3d7f26916a32d0ce47b322c779f0746b. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/DEUJ61700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eb9528d22614c7359e7b3ae0ed3af2d2b18c66a07577d8b44601be530ae943. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUJ61700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b864b4a42094622ab0d26d8f26d246132ba46e68b4f5096d98b703bab2890d8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEUJ61700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728066597097ae9df880ae848f9dfaaebc380d05d83c8aa9612ad808dd828fe2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DELM41406744.
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