1995 was designated as: United Nations Year for Tolerance World Year of Peoples' Commemoration of the Victims of the Second World War This was the first year that the Internet was entirely privatiz
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 0x5b8846c04fbb5b4fbb811c6b22d4bea2d1e6fd9aa0f9d2ef4475940c70ace2ac. 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/81fdc542-a122-41f2-9b0c-4b9d9242e05d.json and https://artists.proofprofile.net/proofs/artist/81fdc542-a122-41f2-9b0c-4b9d9242e05d.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 0x9cb05ac0004308564983fedac4d4628dda743ab05a8564cbc3f0bb41ede60a55. 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/QZWFX2428640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef46f68ee27553903c02961275fcb27e21f5817b883ff8c7a262fadab270917. 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/QZWFX2428641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b56965d6d648c2d246048e59609cf2b3f508d8529721558b3384b4d6add7036. 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/QZWFX2428642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccf48ecaa21ff6b1036eabcb3f4a74418b8d8fa437c535b4c05961df0d88f50. 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/QZWFX2428643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615560b0edd98e93774804b5a2db459f4205c6f0a93dc8ae3d2c2a3dc606611. 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/QZWFX2428644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9d415a9f8001833c17f924261d6f6ee0b464c510e0f5adb674ce3974e97fc7. 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/QZWFX2428645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3856e4ce49630bdd2ee9e8bdcc5d9ac8291ab7f6234ab13e9594dac89158e02a. 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/QZWFX2428646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a445fa8c3ee2d3ddff0778c245a0f02a24a615d9f0f7f2079d2fe6dc5704a6e. 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/QZWFX2428647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b0087f3fb7f7cc5481dc6d2a92ca76ef92871dc13793f4b02e292155194f8d. 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/QZWFX2428648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c472a1e32478747a0a4f4531c121986035d8663e6d23e5330605dc3d6a4f72. 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/QZHNC2411365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e62d471eb8042b83dfd50e3bf5d4d1f82390a710682036274955fa12d6e738. 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/QZWFX2428649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb639335b7cd2aa62916f381c6e4be232708b33ed262160d8f66a8bf7b6b2000e. 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/QZWFX2428650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a426904b393f56d5e6a70150f454324f59f644dd2bcd975a9b3b5b6d0b3765f. 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/QZWFX2428651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4787932b5c853a50e569d30fe1ec7b0c8bf65e52e0b5cdcd386ee42bb61d6529. 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/QZWFX2428652.