William, Billy or Bill Thomson may refer to: Military William Thomson (American soldier) (1727–1796), American militia captain in Capture of Savannah William Taylour Thomson (1813–1883), British mi
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 0xa5df8e6a64135a2be499799c53aef60ce501158c6ef7cc591d932a9126cfb17f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb064b63-0088-49c1-a2a8-c15d2809f0de.json and https://artists.proofprofile.net/proofs/artist/cb064b63-0088-49c1-a2a8-c15d2809f0de.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 0x8f8307e0b0339a39222a3498b7a0a3349c42a2dca8efb9c34a834b3539380012. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN32009992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8307e0b0339a39222a3498b7a0a3349c42a2dca8efb9c34a834b3539380012. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32009992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e3fe4c31918ba0e34406df1e4f4b6f841a7a60491645e1eca08872b3317053. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN72030018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894a63f2d3511b9427f65ce2dee24e15ecc88f518ffb62e5830a28c0a9dc2eb6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKR6V2117059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053151194ad0ee40ac5d151c91f84992a982dcfdfcad95f03d1c077eed05fdd. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM24S2107665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839c79c13f6fa280e69eed618200f85f5c3f6ef9b974808d4092200f8f4507c6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKR6V2212183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb778f2ed2668eec91279fd5682b9873fd822d4c1921aea7d47390b3bb06e27. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZ6BJ2207902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24aa9046185042469f9d6c55893c6d01b8d1a171c0d882e8bebd27d9dd3871. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKR6V2213793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6c91cf24971e08d431f4a0dbe1dc5492c2b3649b73d0aeae5970a9fe5d7ad7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUKDT2300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cfdacb1c07924d41001e34badf07aeca1ab408b00ab0a5a20707f966e669cf. 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/QZ6BJ2403002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e65d22e549e451de1e4d572a9b0bb68b474ff8cb0a1dbeb3d076fbb9925648. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SE69Z2409128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5bfabeca387f687731595052c1fbe72ce1f38f8c52935903f5d67f8b0cf2c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6N22481404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0bdb33f80432bbcbf6879fbb4b5252084f7581189072ef6e83bca3ebe83fcf. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QM6N22481413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0bdb33f80432bbcbf6879fbb4b5252084f7581189072ef6e83bca3ebe83fcf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6N22481413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c226ac91d33a54352caeeedfb096b1fcb451d3dcdee1d62c684f83601b923. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUKDT2400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd9625f031dbf6a7cb2debcfe6199051cc575b908328457c069c23ff071728. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZ6BJ2501402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945dde03eb4181e9cdafd500c9c34f5be7ea3c4e394d9ea6ca04d193bd8b17dd. 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/QZ6BJ2504803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f38024d1cdc2e502d6c744b89add65d9e38ea76757b752ee1666d2366630a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ6BJ2504804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c226ac91d33a54352caeeedfb096b1fcb451d3dcdee1d62c684f83601b923. 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/AUKDT2400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ca6888b639446639cc815658a438e5ce570071f92f4e92918f03e48ab80ba. 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/AUKDT2400243.