thumb|NYFOS The New York Festival of Song (NYFOS) presents an annual series of concerts in New York City dedicated to the art of song, classical, modern and popular. In addition, this organization c
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 0x25a0d9402bd06d41f50065a6de7ffc8890a18017a3f510351c1695b7ff895274. 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/21326216-cb08-4c94-973c-24746f2c2c08.json and https://artists.proofprofile.net/proofs/artist/21326216-cb08-4c94-973c-24746f2c2c08.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 0x9b8b8c51e704e5564edde29657a4a044c50a5366c42cfaca3cc9a1d56d14aaea. 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/QZZEB2318400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f84f6a6c75e4f7739676b56a5c2d266f13d82081d9e042074166a95f85aaf0. 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/AU3SE2200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfb4759cd313761c95533325275285dfceefc0db8f15dc074bc608fa3c1e074. 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/QZZEB2351484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab46e42bdcd64d30dfec8810cfcdd90de754fa6341f2b326ba215f391865892e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZEB2351481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8b8c51e704e5564edde29657a4a044c50a5366c42cfaca3cc9a1d56d14aaea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZEB2318400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac5b8b4394211abc8e12a1de576c1d7f279ada1f0446857fe829f9511b4b0c. 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/QZ5FN2368206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a18a022d91979e3c0adc7450c06edaf6ba7de70f0336f4ddcf189be1f09c05. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZ5FN2368235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a21e2feb877fa18c4da832aa4125e593e949675732e4d58bcd792ae513e1ec. 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/QZ5FN2368219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e24ea727ab8b9e647eb9feb3e8512456c894d51f0d3dc683abd5cb31b0428. 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/QZ5FN2335025.
From Rags to Riches: 100 Years of American Song (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42e66e37fd35ab457fd84c716e8f3d4a7346fb5f322b408517131e0db463cd. 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/AU3SE2100491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59165d468e6528ea852975040786505dcf2a37b58265929afc314b8eb13b7c8. 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/AU3SE2100496.
New York Festival Of Song: The Lied Between The Wars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7491ecfbae26365bb1d70ee7931ac6c9a4eedbdd2b9a7f6c9edb44e0c17c65. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZZEB2319626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9cbb8b088b11b2d87fe773635bb00b7e5dd5f10d3926f016e215c5be2dce8c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBRKQ2260780.
Do I Hear a Waltz?: Take the Moment (Live)
Rudolph the Red-Nosed Reindeer (in Yiddish)
"American Portraits" - Koch International Classics Sampler Of American Music
To The Green Mountains Movement I - Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ae3cfde868fb725eb6e483270eff3415d21d46a9a7051ce07316c2f2baa0e4. 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/USKO19400542.