Rotman may refer to: Brian Rotman, American academic Dan Rotman (born 1932), American bridge player Jaime José Rotman, retired Argentine football goalkeeper Joseph Rotman (1935–2015), Canadian bus
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 0x23964362973a41b5f4ac38768379ec258f754e38fffbbefb6484bf785105638a. 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/7868f0d5-41d4-4b43-bee6-96e9dcbf67fd.json and https://artists.proofprofile.net/proofs/artist/7868f0d5-41d4-4b43-bee6-96e9dcbf67fd.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 0xc06f56155f2ff9d740130def185cd3b3b789504fd1961aecb63e639bb68a1b5d. 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/QZHN71905861.
Fantasmas, cuatro canciones de Valió La Pena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d97f8474bf91d9a08561406a590d46f2eb5d7617f62de52d0661ab0d8955f3. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHN62550179.
Sería Perfecto Si Tan Sólo Te Pudiese Olvidar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc109357d8081069293dbde0e98cbba681431d18d40162864389f2174f88eab1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62550180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99831e4650d2fe91defab595b26b1444b6162eb521308a7abfdc52c69d292c9b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN62550181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3ae257c0b4aefa8c8a70cafc555b7c750cc669f60ddeb858ef71acb72e15c8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZHN62550182.
Canciones Sobre una Casa, Cuatro Amigos y un Perro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c7dceeb1b7fa6687cedfa1e987dd4490351e0d116b1ba1c12f4b92c4393d4d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARZ882100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a26a831a1d79652dafffb8413a1b0a2debeee3f2f3514d39b10262b1d2cb694. 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/ARZAB2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59375f8f43ff5f5caf42adc01cd05dfb99060d4fc6551a6ae89232e8cb96cbf. 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/ARZAB2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57d5ee6794aaecbcde3dfffabdfa83c2906cd0acc1dc87d754551e5cf40ec12. 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/ARZAB2400027.