David Cecil MacAlister Tomlinson (7 May 1917 – 24 June 2000) was an English stage, film and television actor, singer and comedian. Having been described as both a leading actor and a character actor,
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 0x415818c44a7a845a6b348cc9479aeb7499cb59b98869f64cda0ddc73adfa2fd7. 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/e966ac4b-8ca4-4dc5-b590-e9806f90714c.json and https://artists.proofprofile.net/proofs/artist/e966ac4b-8ca4-4dc5-b590-e9806f90714c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let's Go Fly a Kite - From "Mary Poppins"/Soundtrack Version
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 0x22eea6a3b98fda95e7ddeff6e9fa6874d6127fb6ba9d68930b227674a66a5fb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWD10423154.
The Life I Lead - From "Mary Poppins"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ef4b46a7f0a11c9260c088aeea87f1108992ed492372177a4670dad1fc377. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWD10423155.
Mary Poppins 50th Anniversary Edition Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eea6a3b98fda95e7ddeff6e9fa6874d6127fb6ba9d68930b227674a66a5fb4. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T19:07:31Z), 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/USWD10423154.
Jolly Holiday (Reprise) - From "Mary Poppins"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c0020061475d1857966cb0678d0ef2bdf00a3b30e62fe62c8e68ed95f6ea2. 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/USWD10423998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ef4b46a7f0a11c9260c088aeea87f1108992ed492372177a4670dad1fc377. 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/USWD10423155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c7e91e47cd2f6cd4a2ba933e36cdb0e48739a4e83aa29f396f14518998bb1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USWD10220261.
Portebello Road - From "Bedknobs And Broomsticks"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b019cb70fa2407b4a1fa589dfb63e5efe07ddbaf91bb358f330012c73f4a021. 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/USWD10220259.
A British Bank (The Life I Lead) - From "Mary Poppins"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a661494497920295a375ebbaa602d9d495978f76f16de00f42d840baf3cdc4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USWD10423150.
Fidelity Fiduciary Bank - From "Mary Poppins"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fecd61dd5fc088bb6901aaf4f31da7cf0b4d128108bf8dffcd9d093815a9ec6. 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/USWD10423151.
A Man Has Dreams - From "Mary Poppins"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f25131f9ecbc33e1d69be378c9085363521d18bed6b82009044bec010d20ba. 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/USWD10423156.
Mary Poppins (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a661494497920295a375ebbaa602d9d495978f76f16de00f42d840baf3cdc4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWD10423150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fecd61dd5fc088bb6901aaf4f31da7cf0b4d128108bf8dffcd9d093815a9ec6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWD10423151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f25131f9ecbc33e1d69be378c9085363521d18bed6b82009044bec010d20ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWD10423156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a661494497920295a375ebbaa602d9d495978f76f16de00f42d840baf3cdc4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USWD10423150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fecd61dd5fc088bb6901aaf4f31da7cf0b4d128108bf8dffcd9d093815a9ec6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWD10423151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f25131f9ecbc33e1d69be378c9085363521d18bed6b82009044bec010d20ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWD10423156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ef4b46a7f0a11c9260c088aeea87f1108992ed492372177a4670dad1fc377. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWD10423155.