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 0x183645d1808a71e9a2c5c5f437e1044103d82f03f48292dfed96c82bf49416df. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd4163cf-447f-4d1a-9b0e-3cd721343601.json and https://artists.proofprofile.net/proofs/artist/fd4163cf-447f-4d1a-9b0e-3cd721343601.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Menken: Beauty and The Beast: "If I Can't Love Her" (The Beast)
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 0x4420f2f2d1571a34af79a8fc0816fe65330cc14e233c7448ff18b599cbd91668. 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/USAR29601028.
Not a Day Goes By (From "Merrily We Roll Along") - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07588733a1fe870a369dee4bffa4f938c23cb24f383563f9e5ebf63e35f20f5a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USBC19200275.
Sooner or Later (From "Dick Tracy") - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463738e3522c2680d2b99bc851959607889e22bc24010c7ad7653fe4068d93be. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USBC19200622.
Someone Is Waiting (From "Company") / Symphonic Sondheim: Barcelona (From "Company")
Sondheim: A Celebration at Carnegie Hall (Concert Cast Recording (1992))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b2117d64f3f6ff2ff02109a8f2981d7c9a5455125d3d21f9cbd099acc832d2. 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/USBC19200633.
Symphonic Sondheim: Comedy Tonight (From "A Funny Thing Happened on the Way to the Forum")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbfbe3439ba9b019509d9ebf40393e5c3607872e61e064d8210141022359496. 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/USBC19200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9251d9ba0e3b80235820a541ba2d7cd2670e4f6d638d91edb0135d4fdf42fc4. 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/SEAUA1000132.
Original Broadway Cast of Sweeney Todd: The Demon Barber of Fleet Street
Sweeney Todd: The Demon Barber of Fleet Street (Original Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140e1a9226a8d00f2cc4c97b1a906811f9d880350aa8311d8a9bb3449f13be21. 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/USBC10100832.
Green Finch and Linnet Bird (From "Sweeney Todd: The Demon Barber of Fleet Street")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074ed5da300ca0b1257980cfcaac7571b0d94cd13a458adb73b02d5ab8f114c. 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/USBC19200624.
Man of La Mancha (Studio Cast Recording (1990))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b247b3c07497419990a25bf3493948233ca37ecfa85f9774eaf9175e8ae5311. 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/USSM19605907.
Man of La Mancha: Dialogue: May I set the stage?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e58ce5fd5e1cbdc000c5958da2f57139a2596d3aff78ce52ad5143fa7093531. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USSM19605908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179a39ce1aa0ed3492f7def59687069e235fd6bee18bf8771ddd0f7f8e444f19. 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/USSM19605909.
Man of La Mancha: Food! Wine! Aldonza! / It's All the Same
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c542fdc545be97aadc1675244db21ef09b56edb3cf3468aacf3e8510b33e36. 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/USSM19605910.
Man of La Mancha: Dialogue: Sweet lady ... fair virgin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d99647260e126162b69c8a1f78e1274e2bb2d2013ef5582fad57a7ec1f629d. 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/USSM19605911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6d082b4ba9c8233f87de4c7a00bdabcfc06ee74e8e9ae37c547b41c8cb215. 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/USSM19605912.
Man of La Mancha: I'm Only Thinking of Him
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436344389fea996810bf037b41bd827fddd638e58d1eb25f477b3310765193a1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USSM19605913.