thumb|261x261px Christopher Bill (born June 9, 1992) is an American trombonist, composer, arranger, music director, and YouTuber. He presents classically arranged popular songs multi-tracked on tromb
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b7b556793f89620b7c5ff0e409b469b22d3e7f07fa12a4291c38f0a8955411. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d994a15-8fdc-4ef7-8999-b29cf69805fa.json and https://artists.proofprofile.net/proofs/artist/6d994a15-8fdc-4ef7-8999-b29cf69805fa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be6121ff1a795eeeeed7db89836db1f14d6c781589a1d2f13c72c0e5f95658. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ1450603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530f0a854bd7a4065a1d9dc0ae12e62a1af92aa30878505b292bb995f2d4c90. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGJ1450604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88491c57f53c91003acd0890483d894caf6a6e4c125b822fd4719871d5c7a91. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCACX1778753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24c84e2d0650fb5b9d9dea8f36db33254dc756b85b01affa43c5bf8ded3986a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCACX1778756.
Bohemian Rhapsody (International Trombone Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fadcc3b9eaf66c7faf7ad47210cc2dec0744b18ddbcd2b76098dccc5e90ef0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:38:58Z), 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/TCADU1893761.
Video Game Symphonies: The Complete Remastered Series
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb14cccb3677d2c75064029c54da1df5d071e8f80add1268be94689b7222cb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAGZ2305570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5d923139cd60b3a98767371f9a00db638af46efcb1911b2da3486c03c875eb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJJ2506410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7a3ec745019c97924d6067cbf1486722d48a9557c0884c4859a1155deda61. 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/NOFGG2386110.