Marion Harris (born Mary Ellen Harrison; March 25, 1897 – April 23, 1944) was an American popular singer who was most successful in the late 1910s and the 1920s. She was the first widely-known white s
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 0x20c15d2e791c7d300d294b5219f7ef6c65b6c7b0f45876033a4ed11af82fadc7. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba96fa44-439d-45f5-9285-8ae8a2f308be.json and https://artists.proofprofile.net/proofs/artist/ba96fa44-439d-45f5-9285-8ae8a2f308be.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2288dfab8ad0cd73a13370783c7695cda0a14cfb146c4dae548c468365dda2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZZ52172308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d56262cf19c5b80deab63ff42189d8ed091ee110d87f9a7cbe40f9674ef12e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:17Z), 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/DEZZ52172309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6053cfe71375749af88fd572d3526e011fb89c05a79b3b05d8912441d5b2dfbd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEZZ52172311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6172da648dbcddf0e8af51db60e8cc57f6d48ec81cf5ab9130f1eec1a6a8f6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:37:23Z), 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/DEZZ52172312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011cbf3d664c099282ea34a787b9fc9638a39fc66f1f636e559da8c7c89759db. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEZZ52172316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7dee91a22dfac2c6577855795aa939864c17c8bf46e9a1420d98c982972a4f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:12Z), 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/DEZZ52172323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046b66763edfb5ef016b64ad62642dbb2e33381898af4993ccc1146e00fe6eaa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEZZ52172326.
Marion Harris, Tea for Two & St Louis Blues
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacb963c33742c0dc75199a0ba31f58702295e488259689463cc17b1c960b053. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USA560903806.
The Artistry of Marion Harris 1924 - 1934
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecedf9087572123263bf80b201ba3c95165b697604148d2021ec4c75dc77b68. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA61346638.
Marion Harris (Brunswick 1) [Recorded 1922-1923] [Early Blues & Jazz Vocals]
Brunswick 2 (1920's Blues & Jazz Vocals) [Recorded 1923-1925]
It's the Blues 'Taint Nothin' Else (Recorded June 1923)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054f5f0cc839eafef669eac8af1ebaa742cb850b80d25e3b292b4e126bf13933. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USDHM1426973.
You May Be Fast, But You Won't Last (Recorded October 1923)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e439ee1eaaffbbd40aba488deb25d95406c1b844684fefd18ef1743e11e3e3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USDHM1426975.
Brunswick 3 (1920's Blues & Jazz Vocals) [Recorded 1925-1934]
Nobody's Using It Now (Recorded December 1929)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90063ee1788e113816a66db4e5b0f988f1cf5744aee21209709f2d53815ae0b5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USDHM1427047.
Nobody's Sweetheart (Recorded December 1929)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5946710789486830df0474fd32a0b294ef52d735bd5bb62487d316390e65e555. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USDHM1427049.
Columbia 1 (1920's Jazz Vocals) [Recorded 1920-1921]
I'm a Jazz Vampire (Recorded September 1920)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e55a0ccb4d0dad8ad425f5f3bd72372c94e0717c28f0ff47aa24f625dfcb51. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDHM1429433.
Columbia 2 (1920's Jazz Vocals) [Recorded 1921-1922]
Classic 1920's Music, Vol. 4 (Special Edition)
I'm Nobody's Baby - Winter Jazz Music from Marion Harris
Baby, I Am Jazz - a Magical Summer with Marion Harris
Essential Classics, Vol. 1069: Marion Harris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e51da9e5c858dff4f2eb4ad5ee8dbbbad68356534fd9189b59b021e2b0fbf8. 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/USXTG1100802.
When Alexander Takes His Ragtime Band to France
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87aae9e8a4045145a012c7920139414c6639aba4a23d3a5cdb1c3dfa274f7b5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCADL1868456.
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 0x7bd175570e8be5d9b9dd75e1739ea53f129efca9fbe42096cb40c7c62409640f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEKB71657990.
The First Torch Singers, Vol. 2: 1930 - 1934
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1943f213a8f3d6cfd821ad9c9dc363d6d17992a2eb561d61196888b82a4d572e. 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/USXTG1100185.
The Big Broadcast, Volume 6: Jazz and Popular Music of the 1920s and 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66273af243900a8fd461cc4273c707e0c9260afd214f9f221e56ebb0032564e5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USV351316620.
St. Louis Blues: The "St. Louis" Blues (Arr. C. Norman)
Hits Of The 1920S, Vol. 1 (1920): Whispering
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdedd01e9e2c3cfba36d164d91e560d3e460b829693c4898b0ed91d7d862264. 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/HKI190216109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b1612db12ff856c6256fb778cbfe367009dedc75d40394cd775755500af8d8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA560804968.