William Christopher Champlin (born April 24, 1983) is an American singer-songwriter, best known for his appearance on Season 5 of the NBC singing competition The Voice as part of Adam Levine's team. H
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 0x2b1cce004e0dbf64cd051060c5cab96df3731d2f27417ec02473a7c82478bc70. 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/9d5a00e0-12a8-4bd6-bef9-db919a8d7a11.json and https://artists.proofprofile.net/proofs/artist/9d5a00e0-12a8-4bd6-bef9-db919a8d7a11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
(Everything I Do) I Do It For You [The Voice Performance]
A Change Is Gonna Come (The Voice Performance)
The Complete Season 5 Collection (The Voice Performance)
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 0x795422498ba1ebdc6a972fd29cabcadafb4b8b1a02f5570e2df3bb92edcfdde6. 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/USUM71311843.
When I Was Your Man - The Voice Performance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f96dc9c25820bab2c3e03e0c5f4617859dd5ff351969bee09d488f0fbbcf3c. 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/USUM71312161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8a4f55a1c3231eeecc6645ff8566b166cf5a27f092680e52f60cd4a55aebec. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USUM71319077.
A Change Is Gonna Come - The Voice Performance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759f75aa29d3af355b1ce7b2f61e96fa94dc22cd6b86bdf2c0757e408de86759. 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/USUM71319442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe7e18906a365687f7caa7f9f8b87cda33ab9cd9ac57687bf5a749115cbdad2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMAFX1400005.
Angel Dream (No. 2) [A Tom Petty Tribute]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1567e479b71407ea255e88b6998f62b52a69cc2c47074c36579355f3daf18f01. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US43C1609712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e3b839eceafaa3c6ba7ec84731816e753b5174f3c757c40700028ae670e555. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US43C1605927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105ead0b2d7cd61a0872f3ac30b510d1f57596d00486d5c932c6b6114c46177f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBDMT1700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03584946221f595a1e0307974c5136e80f2bd485126af79f872226b0e984053d. 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/GBDMT1700231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c837c94605f39d426160f1a46e7444dfcb9f53cacf9244c42ff10958e786e04. 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/GBDMT1700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d9b9a25a695fee7990ef4dcf388ddfd332ae3a6bdc12707efb52ea32727325. 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/GBDMT1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1cc37acc3aa49b5cb9afa2d1930d525fbaf5607c02104b35bc6ed0a36d21e7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBDMT1700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bca7f90be868f174a9ddb13dee09c3122474a66ffeffcc978e58802999cd64e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEEC32000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f9022b3ce7930afb1917aea01500cca734c546540c4d78162d6875661aa5f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62237108.