David Keith McCallum (19 September 1933 – 25 September 2023) was a Scottish actor and musician. After varied film roles in his native Britain, he gained wide recognition in the 1960s for playing secre
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 0x99a39fddbed608f7e47ee82e1834d15a325d4c57dbaad0cf46cd1fefc1baa7ea. 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/8dce54ea-67de-431d-a051-59d37a089144.json and https://artists.proofprofile.net/proofs/artist/8dce54ea-67de-431d-a051-59d37a089144.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 0x9494fc9f270252019bf8ef4ca6caeb2cd3a889f2bef334cc05ee81455a8b8342. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USCA20601891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78ea6c702eea5eb00eb40e57dcce4bdaaa62c67931638c7fef01c5e71a06b1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USCA20601930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f40f78e7af69fafd45780c6d649800f299a03e5af9963435c2bbe598de947a7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USCA20601933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d8d1dca6a58b75bcb50f9b12dda8314a78e794f03a6cd39953625d95a9ea85. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USCA20601936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e547f4a895f3c2dace320531724953b6c81532e007d3381e694bc01042eebd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCA20601937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e1432a1792e9209ea5096700e2338380fcbc20d1584ae1e7536b5bd90387d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCA29700634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab78d1559065e9838419782db3ab91b5b009bbd7e8e40ffbad794240d8b32f. 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/USCA20601941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e5d636d2b2b3f9a761df0a3a92e66c46b6f1dfef8c952d9ce55ae7161018bc. 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/USCA20601945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbec7db3a9b48cba53db904e84e541d461213d8fb5b98c076994c58beae166c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USCA20601954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf1579938b1c9bccf06660efadbb39093ad73b5fc82247a8f25951c1408f7e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USCA20601979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337fa77e053626ba8126136c61c672a3414d57493b9afd84f39eb57ecfe756c1. 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/USCA20601981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde83a2de2d310ec9355de4fb91a6181b8811d7d704b9072c6179f2bab41c4e36. 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/USCA20601980.
Song of Jupiter (arr. of Handel: Semele, HWV 58, "Where'er You Walk")
Anderson, L.: Orchestral Music, Vol. 2 - Suite of Carols / A Harvard Festival / Song of Jupiter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb4fbf33bc0adb23469f934c02c1b629308637deb5606618263908913076a7f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/HKI190803215.
Greek Passion, H. 372, Act III, Scene 5: This Night I Understand (Manolios, Voice, Yannakos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5dd85e5eed5dde5dc68f8c80492b42a03b3c8f6ddcf8ea5772dd8e226f627. 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/ATMA40510947.
Greek Passion, H. 372, Act IV, Scene 1: God Called Up the Day (Commentator)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a62a5833e7ffbec8d97cca562a6cb050fc9587f1e43ccf28d53f374bd71c401. 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/ATMA40510950.
Greek Passion, H. 372, Act IV, Scene 2: Then, Winter Arrived (Commentator)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3e4ece114928f517fdcf42ab8c363ce566419d436233bcd2a17a92548e9b9. 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/ATMA40510955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba16d5a3df07777a822f40927447092d982286c409ef3510cd2816fd10df652. 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/USBN20500221.
Mellow Yellow / We Gotta Get Out Of This Place - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74786d4d0ee52e028807ae33597d71aaef55f520311176d6007e0554f2a3fe8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USCA29700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acde969180fe6ca82eba7b3efa43b42736bcf2870bed8dfe72e4a83b8081650. 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/USCA29700633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d20cc04ec7381782104711bf22d2928b624b3291bbbb3ad6f1b02623d7499b4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCA20100679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337fa77e053626ba8126136c61c672a3414d57493b9afd84f39eb57ecfe756c1. 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/USCA20601981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3778619cc7440be1af26ec0944899f3bf0a8d6d57cc0fce0065255043dc8469. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCA29601245.