Walter John Buchanan (2 April 1890 – 20 October 1957) was a British theatre and film actor, singer, dancer, producer and director. Born to a comfortable middle-class family in Scotland, Buchanan atte
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 0x6f2542bc5964db15be6fd26d27f913ebf365e11988ec0cebbe50996a8dfc3e07. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43d7e578-1493-4dab-9e72-98226e77f4f6.json and https://artists.proofprofile.net/proofs/artist/43d7e578-1493-4dab-9e72-98226e77f4f6.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 0xd584fb34817961bd9ac8d0f5f4b6af18347a9404a3cf04a941cfd81dde75aaf8. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/DEKB71569803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d113083ce7406b49d7dda9ca1a291d3a749599b315650761bec0982ced991a6. 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/DEKB71569809.
That's A Good Girl,Toni and Boodle : Original London West End Shows
Remastered Classics, Vol. 230: Jack Buchanan
Three of a Kind: Jack Buchanan, Eddie Cantor, Jessie Matthews
Like Monday Follows Sunday - Songs of the Golden Age with Jack Buchanan
I Guess I'll Have to Change My Plan (from "The Band Wagon") - 2006 Remaster
That's Entertainment (The Ultimate Soundtrack Anthology of MGM Musicals)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ee92c475ff574c0f4850f747e08dde1981a6d9877678d1a65fb94144078699. 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/UST1C0550554.
Dancing in the Dark (From "The Band Wagon")
Vintage Hollywood Classics, Vol. 24: Silk Stockings & The Band Wagon – The Complete Soundtracks (feat. Fred Astaire) [Remastered 2016]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb653f5852aa1e63897ee82ced143d59d89b6b893136598ab6d27490fe945f15d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEL111600703.
That's Entertainment (From "The Band Wagon")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb945671ca01d21dbee78c81f115a87f9c702543d64c250791b7182c38fbdc936. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEL111600709.
A Shine on My Shoes (From "The Band Wagon")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3338d9ea5192f2b093656f3029dd1a920d0a9789c5d823d0d0ffd026d74657. 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/DEL111600701.
Main Title/ That's Entertainment ("The Band Wagon" / "That's Entertainment, Pt. 2") - 2006 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c72a8e42535a95b91e97085e6a225adcdf29502fc17f3e320c93ea2652af7a. 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/UST1C0550563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3828218da88874b826346c9faffe970f18cc5a8f42004a6e24c65b4a64014845. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEL111600702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f405320cc027b02fcba10366db6d1696ba47030120f2907c515aecc55c7ce2b. 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/DEL111600704.
New Sun in the Sky / I Guess, I'll Have to Change My Plans (From "The Band Wagon")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f990a4a5e559a70509ecaea5fa9e413c21206b60a99c5ba6c42eecd2b698e46. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEL111600705.