Topher, and less commonly Toph, are abbreviations of the name Christopher. Notable people with the name include: Topher Campbell, British director of film, television and theatre Topher Grace (born
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 0xe2607a0ecd5ee124f59f9063e18d728b8169d1faef0cf85a9b64d2f6b928bbdb. 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/6d8d8ebb-bb32-4a3e-8e72-5e2bcfb7c49f.json and https://artists.proofprofile.net/proofs/artist/6d8d8ebb-bb32-4a3e-8e72-5e2bcfb7c49f.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 0x513a9a54f9d6a56fa6cc535e089dba946cf95f7021af1613fb23af17fe4ea502. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWZ2065390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280ac684df6369dd45d39706e89c77adcc8be6c0b27d5fd5837a38ef892c381. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ22164446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f5c99b454b1f366867b077d5f7923b1b4829d2120884015e09f5703342f474. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBMA22159107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf192f1aeb475682b518e8b5e93e795819d1c87cee0482cbd5e06a87848603. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBMA22159114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4716ef993bd4505073f1011f76d5c5b7c2c0fdd6759f276849069fe58e54902. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/UKXN22163437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afd3c4d0f93b5125cdd7d1a676eee87b65e2ee7b6e840a657f8ea690ca93075. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GX3Q92067907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc1f9e5ecfbdbb985a22319944d56fc06a873c18d2f7fcf155a6eee6663cd2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GX3Q92183903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9048a374b630ce727630088ec96a6f0a6ff03ab3dda6459c7351ee8d624c5859. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZPLR2196054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c10953c6230cd7569591d2781ce0ec5156b3ec69bc554cb5e4253c5dafb90c. 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/QZRP52109031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd062b4ad21dca4eace0bf2c9e54b4b1dcac67df148f20bc71ba19d84205c879a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFZ62263516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6ccd4dd57edbfd0d1e47dbce102a77c3484f07067d1fb39e5a2cf806d3596. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFZ62263517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2158bac90d45d00bb8c1b00fd3040b93ef62c8f133bf012dfe3886d9ebc26363. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZNWX2209345.