thumb|Bob Smiley, 2019. Bob Smiley (born June 28, 1977, in Ventura, California) is an American writer, founder of Silver Cord Stories, and partner in the Humble Picture Company. He is a Writers Guild
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 0x6a805d435651c1edf8c97b1b3e92f40fb1c39a16d5dd7e970534158669658b0c. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/173ee9b4-2a4a-48c5-8e33-d26a29fdda09.json and https://artists.proofprofile.net/proofs/artist/173ee9b4-2a4a-48c5-8e33-d26a29fdda09.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 0x431254535d99d412ece7b57168875ee3f7f5973d82f0b5c0da35457f2b605fda. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QMJYX2197301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc89d1d8d0f41e369bef0e5b9c5fd9f28017b9d368202477003e99ac6ddb7b96. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMJYX2197302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb4c84478273c3bc662a1bc65e02e043842fa12ae0ff3bce86dcb9dc535b45e. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QMJYX2197303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a4570ccda77090ecba6c9f7b85bd8e54ef6dff7e737274a781b654bf94cb5f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMJYX2197304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81895ec39dd5a5fe835df23b09f376854c851b4702d0e362dc730965d3599f4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMJYX2197305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27255a813450faf905dede14283b000a59e98b1bdfd5d8070b96ff461c5599f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QMJYX2197306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e3dfea705e887d8a7d7b9e966c21cd472eca5a661ca1a6c72bad6d1015720c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMJYX2197307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f6beb4ac3653a434a131da4b56fa883d3d2b3bc2cef880cbdc510b93bd82d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMJYX2197311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68057e44f9ce06a1b735a85fd8907236b606fa940226a1b9faae8bb85de515b. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QMJYX2197403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09cc43c5fca3384933a027ef3028533587ceb7fc651a49f2164eb231a4ae92a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QMJYX2197404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742e74eb232f338237996f186c06ffdfdf3138c57214f6af99ead2b7bbe18de9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMJYX2197406.