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 0x613908e811c5543b2f9429e1fcbd5ab05289d41d61ff5640442d555da236b2ad. 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/a8febb1b-81cb-4a5d-a891-abdb2c8bd47c.json and https://artists.proofprofile.net/proofs/artist/a8febb1b-81cb-4a5d-a891-abdb2c8bd47c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Caruso, Enrico: Complete Recordings, Vol. 12 (1902-1920)
CARUSO, Enrico: Complete Recordings, Vol. 9 (1914-1916)
La traviata, Act I: Libiamo, ne'lieti calici, "Brindisi"
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 0xd99cefc979deb912b3a0bc9872243f618beb94afca26d1283dc65079712feae7. 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/HKI190310901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe230ef73c64c33fd700eb1894ba6ce45dd39930f1a1e78167c6e2ad691289. 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/HKI190310911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69139176c31ebbfb0af90d229f9cfa22aa70d0f825fdbc36ca66cac9636445f. 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/GBAJU0600196.
Happy Feet (Original Charleston 1925 - 1936)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0338e587e6f5bbad0bfeeb84d619c49ae3a81e415e295519b8f858bb0c15f61. 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/DEHB51256969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bf94f2c0d0545c6f65f53345bc6bdb3f761ee316fd2b081fab727607b0b93d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEHB51249200.
Kreisler: Complete Recordings, Vol. 5 (1919-1924)
Apple Blossoms: Who Can Tell? (arr. for violin and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50194bf9af0e062c7ea1a00d7d1aaf3a54b9196f2ab1792dea4ee4f2361752f. 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/HKI191222605.
Caruso, Enrico: Complete Recordings, Vol. 10 (1916-1917)
Beethoven, Chopin & Others: Piano Works (2024 Remaster)
Mccormack, John: Mccormack Edition, Vol. 7: The Acoustic Recordings (1916-1918)
Concerto in D Minor for 2 Violins, BWV 1043 "Double": I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cb561508ee6612665ddf8d5d1d40e7367daa78742db19b6b406cdfbfdc6dfd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMBZ91314470.
After You've Gone (The Original Charleston, 1926 - 1929)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7375a66314f6ea55e3ec46c28fbfca0aa6213121c0c76a852256d80d4f54416. 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/DEBL61264262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26bc47fc5eb34490c17a4dad8223611d9835e9da1fe1a4b27be94de0cec9d3. 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/DEBL61264263.
Charlston Medley (Introducing "Open Your Heart")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80abe359068a545dd5b52e87cd5d14aee0100ecf42249a3e0f99cb6433f7833. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEHB51249581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968656acb8f188a324c49a072864283f6c2f48743c225214e38ca66c14d616cc. 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/DEHB51249595.
The McCormack Edition, Vol. 8: The Acoustic Recordings (1918-1920)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731891b546ce7ca82cc3b1bc302a91bf2b7b7826cff91b7561bb854c165c2e47. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKI191006506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87743be49ce6aafb1dda513c637a0462a9f9189b4de27fb254b507d1a2ae88aa. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GRHR11012719.
Love's Old Sweet Song: Love's Old Sweet Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27fa3ab46e4bc1d497516f5cc33000705311735215c904fdfb8dc1c60dd0e0d. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GRHR11012725.
The History of Tango / Victor Orchestras / Recordings 1928 - 1935, Vol. 2
The History of Tango / Victor Orchestras / Recordings 1926 - 1929, Vol. 1
Lucrezia Bori, The Victor Recordings, Vol. 1 (1914 - 1925 Recordings)
Schipa, Tito: Complete Victor Recordings (The), Vol. 2 (1924-1925)
Mccormack, John: Mccormack Edition, Vol. 1: The Acoustic Recordings (1910)
Caruso, Enrico: Complete Recordings, Vol. 11 (1918-1919)
A vucchella "Arietta di Posillipo": 'a vucchella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090980222108e9597a64f0ba1eed70518669cb84a00dd08b6410d9c9cb787aa9. 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/HKI190336415.
Caruso, Enrico: Complete Recordings, Vol. 8 (1913-1914)
Caruso, Enrico: Complete Recordings, Vol. 7 (1912-1913)
Caruso, Enrico: Complete Recordings, Vol. 6 (1911-1912)
Caruso, Enrico: Complete Recordings, Vol. 4 (1908-1910)
Cakewalks, Rags and Blues - Military Style
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c9cb846eac6585c5719fceb80badfca0df0b5e9a61bee0d06a0232d711b36e. 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/US4FU0840301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3d48e67077f3d317eccf8d3003f3daca3ff6455ff4c757427c55066fde8366. 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/US4FU0840302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1168b9dbb5787bb6dbefa45a56f536f6a0d1e643fbe572b1cedc004d8f64bd0a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US4FU0840303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ab521c9ccb142d5553bfdff9ba733e43151b777820acccdfa10ec97cff30b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US4FU0840304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5f0b18cf0dbd5257cfbe028f36dcc446a75ee133ddb4cee3669c5215a09ad. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US4FU0840305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf51bceb10ae6d3a8fae00a0804ce7bb027964b0523a08db1526d06250359744. 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/US4FU0840307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c12dc7e9e5b14caa76d1de3dd18cd52d38675065ea2de9e063dac4afbf8b0f. 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/US4FU0840309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd818953580c9c701d0dace2026b67742c7184352f741db29d270ac51f7ab5. 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/US4FU0840310.
NOVELLO, Ivor: Shine Through My Dreams (1917-1950)
A vucchella "Arietta di Posillipo": 'A vucchella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090980222108e9597a64f0ba1eed70518669cb84a00dd08b6410d9c9cb787aa9. 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/HKI190336415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecfb030ba67af0fda439093d50cc7bf86ace5ec8e2447f5d6be238051b180f0. 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/DEPJ41100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120d31f61fa7fee1063e98986f326220c67f1295a81339e4c75787cd69b3061d. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEPJ41100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d4d4f85e0ed0932c9a3ef8efcdce5826f928aadb14e1446c4d9d43b898d230. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEPJ41100228.
Gli tre cicisbei ridicoli: Tre giorni son che Nina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae28b4612ad6d6ddbd98ec36e4f68f5bfb532a9772e564faf93c32fb751756. 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/DEPJ41100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3818edac47c08e734279bc94a92ef65905a9234774dd85ae22d822dbea35bfc. 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/DEPJ41100233.