William, Willie, or Willy Mason may refer to: Arts and entertainment William Mason (poet) (1724–1797), English poet, editor and gardener William Mason (architect) (1810–1897), New Zealand architect W
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 0x882317ab7bfc95e6a368b9cb68799fe220d72abcb5f645bb92e9e988af192b36. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a23864c2-0ede-4de6-ba28-1e62885f36e0.json and https://artists.proofprofile.net/proofs/artist/a23864c2-0ede-4de6-ba28-1e62885f36e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Maiden's Prayer: Piano Music from the 19th-Century Salon
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 0x3cbd3e5955c779693fb3644114504b431e97d17662392504ebc355c7496c6b0c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAJY0337901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ef724b135d96ccfd5570218b54ab8193e4788eb771a2bda4f4db016648c41a. 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/GBAJY0337902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21bbb690206bb81b884f0209efb8815633743bf17c9f5da91a92b8470ed3eca. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBAJY0337903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4125f3b084875fecc024508c1b6cf199413664fa37e6132029f9df5ee38d6ed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAJY0337904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cf269b5349ab5f94ccdd734ca02e629dee1fd64e74b0130b45e2ed05cba788. 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/GBAJY0337905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e295df20e6b71af8ed6a8972e91ad784b9f024cb653b9d85212f910a1c08817. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAJY0337906.
Humoresques de concert, Op. 14: I. Menuet célèbre in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb9fb01b532e0c53defae72f766f1cb03d49aee6dd71be753eb25fb78c77c0. 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/GBAJY0337907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877ecb33cab1ca7fe8fcf0b957a6171079827e1a1edfd99a0b6827e4fac87e08. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJY0337908.
Suite No. 5 in E Major, HWV 430: IV. Air with 5 Variations "The Harmonious Blacksmith"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5837851b8676db71ebda29f63fee327b5d17c12acffa0022511b5cce184a329. 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/GBAJY0337909.
Lieder ohne Worte V, Op. 62: VI. Allegretto grazioso, MWV U161 "Spring Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5818b3abf4162a48f4ade5d5c2e2e73233c64d435e5470b522fee74f14c6d8. 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/GBAJY0337911.
5 Pieces for Piano, Op. 75: V. The Spruce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b5f4a32b4d0edca0ace7cf2ec30afe97d6ed5d7369cfc34620b8f005086531. 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/GBAJY0337913.
10 Danses de salon: I. Tarantella in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca26a61dffef65ff2b8fccf1c0f4a1328e044b975dffe679ee63d9bbf58f2328. 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/GBAJY0337915.
Moods, Impressions & Reminiscences, Op. 41: XIV. Poème
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3320f0ed624c14d60ff9361cdf9e9fe8eaf4e221a3edb640521a4b8897770a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAJY0337918.
2 Pieces for Piano, Op. 157: II. La fileuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980e228e66b26b0505c0401e1ef3cbda71b4948ce9bfb5a3efeaffa6da651277. 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/GBAJY0337921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06022b7ad18391077b682cf59eeff5cfdc7742b18e9247d9f715944b432dfaf9. 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/GBAJY0337924.
Eugene Onegin, Op. 24, TH.5 / Act 2: Waltz with Chorus. "Vot tak syurpriz!"
Orchestra of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b8f89662582479a0ad1d1b687f7f6432c44c9ce62644d6ae63f3ebc48cb97d. 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/GBF077440320.