Tim Halperin (born May 27, 1987, in Omaha, Nebraska) is an American singer-songwriter. A piano player and vocalist, in 2007 he began performing and recording, and in 2010 his track "We Fight Back" bec
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 0x07c6ffe0d72f1e0630c1a96672e430756424c77b5d161e633c9d67e6be18eabf. 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/397d5cbb-3898-4d9b-b343-0f8af3d53e7f.json and https://artists.proofprofile.net/proofs/artist/397d5cbb-3898-4d9b-b343-0f8af3d53e7f.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 0xab2b0aba99adaa80bbafbe3d3c34a50bf99ffc03ce9b77e7c6bd291db97547e9. 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/QZHN82469442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390820e7b193656c5b2a7a38bfedbf0d441263c6d61d2ff5da1578a79a91c0a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMTND1100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390820e7b193656c5b2a7a38bfedbf0d441263c6d61d2ff5da1578a79a91c0a2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMTND1100192.
You Know (Surrender) [feat. Tim Halperin]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603e9389bc9e04f8c789e6203239406a9653cbb4226620cfffe378d691b90078. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCACE1593751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2b0aba99adaa80bbafbe3d3c34a50bf99ffc03ce9b77e7c6bd291db97547e9. 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/QZHN82469442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0164e0561f0b210a255bd3317669e8938078deff10b3fca3128ed34c7b63b81. 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/QZDA42438377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84f5193ffb5b7212332340d284abc691591681a6f30f7c51c80ab23cc7a8c3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZDA42443805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6293be54979e9dec6c65781844c91a463d557f5bc126a475d7686be6e87577da. 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/QZDA62400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f250796b85345a6e70e0045c13a791456b00273d9b38b2b30628af5b7d00b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA62400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f794ae62203b71a20358ee9ba7cc5b629820189b4c8f4ac9c3f92f73714e06. 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/QZDA62400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e3264789d6ef40ec57e982b9b25a241a7bd4a33866ee7fd4f0517595dc226b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZDA62400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84f5193ffb5b7212332340d284abc691591681a6f30f7c51c80ab23cc7a8c3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA42443805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0164e0561f0b210a255bd3317669e8938078deff10b3fca3128ed34c7b63b81. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA42438377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcaa52fa55f2e774bae4ccb3b52f66adf259aeccf66519ce275cacb97391f8c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZFZ62002378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22478373f893b13062a98dfcfa97b6576744b6dab0abe00e127f989ae308910. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZARB1827231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9f9de42149939a988ef76855fe4026fcf7adbe29b3b78c5edb2800403e246. 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/QZDA42106089.