Robert Ellsworth Pollard Jr. (born October 31, 1957) is an American singer and songwriter. He is the frontman and leader of indie rock band Guided by Voices, of which he is also the only constant memb
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 0x5617d0013cf912252d56c02cd34ff19242112e56baadd31de76039e1ac5256d4. 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/dcf4ce3c-0783-44a0-a1ff-0cd5440e9148.json and https://artists.proofprofile.net/proofs/artist/dcf4ce3c-0783-44a0-a1ff-0cd5440e9148.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 0x9137bc0cccfa9cee0697db3e93a942ffd341df97fee686671b61a0f6a7649111. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USNUM1710001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a939ee663eecdbe447271de90fd5c9303735419a1e220f7e66d41fa360064e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USNUM1710008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d77967144a4281c2d7841d4a7a649b7caaf427181f454153961c9bdb493818. 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/USNUM1710010.
Music for Bubble (Music from the Steven Soderbergh Film Bubble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a8b6104b7076ef94aeca632a0af69f3ee186f023e0fe13833042e2d2e2bab. 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/US37Y0400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89fdc16336257bb70f5098daf0a72ddb1a9e838fd536b688a3f12810da12407. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USMRG0673003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa826e04dd12bbda32b74626c21ca5d896a21806164da49af7a4bb6a6cae6fb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USNUM1610018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd7882f0767bb2b5ec35b1b3ea2dcbd32c4f7d0cc26abe5d02ff9dadeeae35. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USNUM1610019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fd1dfbe07d1cc89b6a86d84528edf8d841e0db8bad461711436869f63e38ef. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USNUM1610020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245cc1f5292f03ede4b5760864152385807db3067e12a0659b7dfc15b83f2df. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USNUM1610027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386ca9c59e8839b336d534c5d2a6b1d02d96245b69d62648bc84b48229ad74f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USNUM1610030.
Speak Kindly of Your Volunteer Fire Department (2019 Remaster)
Frequent Weaver Who Burns (2019 Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388efcb10b64b9e69d6e72450ff7994c18485c6f4ebcfcf5337ff5d4259070ee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USNUM1909301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89f607269343c20dab2a0111c07577356d97c4473fc70df565f038f5db0840. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/USNUM1909304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d80d4991fad32e222060348d0eb394161fab62e371cd909e1e2341d441d89. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USNUM1909305.
And I Don't (So Now I Do) [2019 Remaster]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d25a943f1405e06706337cd59d9b9217830d9fce11c5f2470400c7c99dd3cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USNUM1909309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb978a47a955decbf1102d4d1c44704e29c3f681c2d17ad4cf1b9c24961a78bc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USNUM1909310.
Do Something Real (feat. Robert Pollard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc808749a66ee61191f0e8b1c45f2eb20621b04ef7a76cc83c76d266c9803c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKO11600724.