Expo 2000 was a World Expo held in Hanover, Germany from 1 June to 31 October 2000. It was located on the Hanover Fairground (Messegelände Hannover), which is the largest exhibition ground in the worl
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 0x97750a33dc80589f5db36bd6a63c8d23556115b7b94ecfb84b2263a58d74d11f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b96611c-93e6-4b31-ab93-0b2837fdbb12.json and https://artists.proofprofile.net/proofs/artist/4b96611c-93e6-4b31-ab93-0b2837fdbb12.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 0x2376069bd8573dcdc0e2ec5a82917a73973bce1dd95659cd06c618f735414af5. 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/PL25M2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1f70cabc28c7d2a3bfbfeb5f5c81cc4c092671a2a7594a9d8f5fa7dc78787. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL25M2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc56e9a4dca142acf900a9b46b51f2e628e6d4def0f49c58a569f7e776b426. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PL25M2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc56e9a4dca142acf900a9b46b51f2e628e6d4def0f49c58a569f7e776b426. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc23ca19707a2ad5db3a91da8b38c551adb006ff0292d9712b2f6ae94d1d69d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038330ff93ffb6af2652f4886cfe46ebb1b3a0bb65d63cbaaf01c28d67914bf4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b915ca55905d53529188d4901aaca5833e572d2591a8660e3d4beeb5848410e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b6f0f14f0858937acd20a3fc4ed2c4be081e90dee81be5b0b20461be4c2fd1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PL25M2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b2653c2cdbc2808cc29c22cee8fbb0f927c2df8e1903e4a7f953f19e5e71fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1f70cabc28c7d2a3bfbfeb5f5c81cc4c092671a2a7594a9d8f5fa7dc78787. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PL25M2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa218daf46648054cae555bd4c7108a86f9194b8c27612cd2fa4494e7e365be7a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:01Z), 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/PL25M2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b8f48170574ced76e80ff127c47a1a9b6d837bed0457b351ebb131069e61a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376069bd8573dcdc0e2ec5a82917a73973bce1dd95659cd06c618f735414af5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PL25M2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f83f9c10a034a96fa77c2c86dd3bfefa5e5ce81005b0681a47ff618f79b30a2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PL25M2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a68908fee3ceb9caa5210cfcc60e6507ddaaeb88c8686e038e6e7264cdd909c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL25M2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec220a01dcbbd0252c0630f2f881cfc6c42c3a03b03da641388c2400584046d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/PLUM72300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf80bfdcc7407a71eb35c616f222be9422089563d4b26051bf9c7f7c10935ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PL25M2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb2a44c93a25e62e9f41d00a6ed918b7def26fbe44522c3179de77778046a42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PL25M2200053.