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 0x087be6dd00bd4cfc8874e928a55403edca50ec016bc8a5e0152aa0b6743d55d9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1010b8b8-0142-4d53-af11-0ee3d2f2a626.json and https://artists.proofprofile.net/proofs/artist/1010b8b8-0142-4d53-af11-0ee3d2f2a626.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Big Broadcast, Volume 2: Jazz and Popular Music of the 1920s and 1930s
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 0xfbb966de01aeb0626b4a19f96f37c3cbfab98c3d709c74b5158d5510929a55f9. 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/USDYP1200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e85eb0ef92c3ad32d5c53345c4c1ec1d058dfe57571534fb76c9963fc8f5a. 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/USCXG0900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ba306adbdf988b02fb70ddca44234caae54ed7a504ba27e09f10d77bc6d43. 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/USCXG0900326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf149f4f958af87ac9c0fe4d4b0126e916394c7abec9202259515748f48e46f3c. 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/USSM11402295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc80be80675ce7b934e27e982af5052d24491da2bdc99299e0781ab296a394a4. 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/USBB10100144.
Livin' in the Sunlight, Lovin' in the Moonlight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f57f51585048f705853a8fc0dc193e6a17bd7c731a03cc2987bffdc18ddcbd. 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/USSM11402291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80ac024ac64a32b40aef60c62802e72686906d26ecabf0666b9cd2ca654bec. 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/USCA29200892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d77662e71a7fefebe6aabe09b016d550248bc6353806d266a2f2ceac709c2d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCA24300018.
King of Jazz - a Paul Whiteman Collection
Gershwin: Rhapsody in Blue, Cuban Overture & I Got Rhythm
Paul Whiteman: Original Recordings 1921-1927
Whiteman, Paul: Sweet and Low Down (1925-1928)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93f2cfb7c94d2832985e4c186d3bf1da8567307981441e0ce482a9059404e5. 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/USUM71517430.
Presenting Paul Whiteman and His Orchestra
Gershwin: Rhapsody in Blue - Single (Orchestrated by Ferde Grofé, Mono Version)
The General Jumped at Dawn / Trav'lin' Light (Mono Version)
Gershwin: Rhapsody in Blue (Orch. by Ferde Grofé, Mono Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d75bda9c850ff91a9c9b8d077ba4ebef3e2c35ceb38bcb77b645ae49098cd. 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/USUM71911332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f61603297be8e3e9ea25ba30ff5a0e592157325a1cbc21ced4ab6289148028. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM71712148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58018355355801c86f044653d7cccd5d3bd39e6644bf89a9b3bbf51e943a9d1. 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/USUM71911347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d1b5811a3fc65e1a66356ea3341ab6da8beb26c1e8731653abf9f09737e6e9. 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/USCA29000873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29a62ce585321eff5daeee124381bf6022560c801c94a4fb35c6de86afcb3f4. 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/USCA20000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc766b826778f7fa2f56c5c5ff7da1b432d578ecf1bdff7b28dfaec35bd42b162. 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/USCA20001290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1850f8bf249e8684fa841c726a3bd6fedb6c06f6df05d44476f33702700ea41. 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/USCA29101659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095267cacd5e9533e60c2b2314091d965a6c53429cd75d2c200076751c59dc87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM71911399.
From The Sony Vault: Christmas With The Big Bands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f1b9cf85553a9bba32f3b624cb73f0e18fe5160b2b7ad445edae676a69081f. 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/USSM19912454.