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 0x5fec63112b394efe32e33424ea08f8e022eda825a39700054fa66befa5525eaf. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7ac9f1c-a655-41db-b8e0-8b2839dd7058.json and https://artists.proofprofile.net/proofs/artist/b7ac9f1c-a655-41db-b8e0-8b2839dd7058.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Christmas Carol (Original Cast Recording)
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 0xefbd88fb16c9643bb79fb8019d2ad1b3476af0fe303a55d6f7aef6ccc4eb2e00. 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/USSM19500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a92c23004214c466632d11b69292a84f0f4343eea1fcdcad14fdbb4a893f2a0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USSM19500463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6853fd73ef65c49776229fe020e5a459acf1bf3092bfcc1e311031ebf4286c. 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/USSM19500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568cc2a60f65c6d1383a68fbe918ff88306ef49a56debb8d31a51441f1cbec8d. 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/USSM19500467.
Prologue: Prologue: 911 Emergency / I Have So Many Songs
A New Brain (Original Off-Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ffe0496025dfb5d22fe3e81c2c0369b6f498d2b0407abd0b5691912c30ba5d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USBC19801854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe944fe9f07dfe154c58bcbe199a3a5fb3574dd6c1b119e6143cf914a91a1f380. 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/USBC19801855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548d86c9e6e766342858c0a354992e3d56f250afbff4b327a34cf3c35e8aa3ce. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USBC19801859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93ec0354c9176597d509e1fb97bd0eeb80556576422192cefe7a6747f123c94. 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/USBC19801860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08371544ab2f66dbf09ce34c844460a9d36ccc790df861a891c5e3e38fe1fa2e. 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/USBC19801861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ed332face1f77ccc3bab846d3d46778c14ad7617004f34a1337eb020e4e69f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USBC19801863.
Sitting Becalmed in the Lee of Cuttyhunk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e565a6d739b09ddb17aaf3c6618958fc0766bcebb4a300ed952615f03fdb5c. 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/USBC19801864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418ad459e44f863d226cfd67564782f34c0c658ffce74435181b0cf02da5055d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USBC19801873.
You Boys Are Gonna Get Me in Such Trouble / Sailing (Reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d45d671bb94f9ce02d372ba6667d0684d5a03da52c8be7c34e2c76cb55c11. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USBC19801876.