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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4cc14bbf0c0481b01be89cce8257a2b3b9df8d0967399022c21200c56a5394. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3306cc4a-7579-4fe6-8e9b-01c8f4f60258.json and https://artists.proofprofile.net/proofs/artist/3306cc4a-7579-4fe6-8e9b-01c8f4f60258.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verbunk un Friss : Invitation to the Dance (Arr. Willem Vogel)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7014b670ce48f824af5b8252f43c8443bbbbe1e6727bcb8083b1bdec98918e20. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM22008170.
Fiddler on the Roof (Theme from Fiddler on the Roof) [(Arr. Willem Vogel)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5013d7d6f21f20ece89a802a68e7e57d4ddc7c8d577cdf08596ccb5ee61a753. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USHM22008158.
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 0x381acd6f6753ada41936a73b23849550f85816b3520234e18bd445250641e0f6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1983162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656844a7479c8c97326567cfb925968abe05564b32acbdc34808bf9c2a3ad1c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1983164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48a1859cd7eebb4f35a53e45761bcb0c0c33c1ba53a2118bf20405dc06847b8. 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/USCGH1983169.
Die Csardasfurstin, Act II: Tanzen möcht Ich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5428ce816a2ead00d22e02d4b6886ca749e479e710e4453f5efa33f13e725fc. 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/USCGH1983170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eaecd58538c7539f5d1e189e7dd64a51639da8c2b85280a73d5d6b64ff0310. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1983173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140c8d83ae41553c5103a6b69a8fd123b6b5cb60be766bf88a0748f90bdc3bd3. 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/USCGH1983176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ffeb70e8ad3d2a1778c25209a1b8bade0409507ae9921f9cc8aac1d5720d83. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1983177.
Ein Walzertraum, Act 1: Leise ganz Leise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995d73cf8a2003c3008eaee76b6ca7ce9e89c6537e188515dbcd7b4366a846c9. 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/USCGH1983161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4c778c375eb6d3457046c75b95d64f2ac8c4aeb2719594fa0b14ae2682542c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1983163.
Die Tänzerin Fanny Elssler, Act 2: Draußen in Sievering
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4917af52736cb489d4a9180c171485ab7715cf0515942da3d2a4e3fad04b1b15. 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/USCGH1983165.
Eisele- und Beisele Sprünge, Op. 202 "Polka"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30577ba5aee4a9300aed4abefab36d6e1ba47d49635297eb1d62988524c827f0. 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/USCGH1983166.
Die Fledermaus, Act II: Lagunen-Walzer (feat. Michael Snyman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774f479763e5948f66c5ff484ddeeb59dcfec67ecd07177ba7082064db6bd8b8. 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/USCGH1983167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ce4dfefeb4390416fdb8d6c5944ae8100df4c4a8786dd53628fbdfbab2213. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGH1983168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb04b81184bd459ca676ca3401b5859ac862b6b94b996acb9a92abbb47b0aed. 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/USCGH1983171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782da0f893ebe4305c9799c013aa43dd2362c9a6e5f31a0562fc851b0137a67. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USCGH1983172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28ff3301f873c3604978685b9aaa6aeb5d6912a1b9ffa9dce71f555cc03a18c. 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/USCGH1983174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f6089d31ca43dc7210b722db950d62ff1636d840527c016c2c565132d46921. 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/USCGH1983175.