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 0xd0b39c3f3077c7dabd6d1e4693e19907d3bafdcb5c5287d343b1758514605419. 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/f824feb4-ba91-4248-97fb-99d05ed4210a.json and https://artists.proofprofile.net/proofs/artist/f824feb4-ba91-4248-97fb-99d05ed4210a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Grieg: Piano Concerto in A Minor, Op. 16: I. Allegro molto moderato (Excerpt)
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 0x11a7b55914082365d3b8164a52a39dc5736db691647c2272ac344e33f71cc432. 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/GBAYD8400197.
Rachmaninov: Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto (Excerpt)
The Most Peaceful Classical Album in the World...Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7fdfc28143c133e610d866f5f8a405dd51234d840c98b1b50716af1ddc65b6. 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/GBAYD8400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7fdfc28143c133e610d866f5f8a405dd51234d840c98b1b50716af1ddc65b6. 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/GBAYD8400195.
Grieg: Piano Concerto in A Minor, Op. 16: II. Adagio
Pachelbel: Canon - Albinoni: Adagio - Bach: Air on G String - Mozart: Eine kleine Nachtmusik - Fauré: Pavane - Handel: Hallelujah from the Messiah & Other Classical Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a8bde2088425f8b35377306a864e5b1e50aaacfc783494e9a6449007e2bbf2. 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/GBAYD8400214.
Ravel: Pavane pour une infante défunte, M. 19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcfb8dce8918fd9a6c7837382f2be07e96770dd240aaa3e52b75fe21ca01ac8. 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/GBAYD8800486.
Rhapsody on a Theme of Paganini, Op. 43: Var. XVIII. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa8c61151d8559577056fdf54919d0856f762ccd0cc0a8caaa171f2623a72e1. 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/GBAYD8400086.
Fauré: Impromptu No. 2 in F Minor, Op. 31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad7dbbd61d8a192ec04d3fb240decefc29dd0ab5eab765166920188b45a86da. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYD8200514.
Debussy: Estampes, CD 108, L. 100: No. 1, Pagodes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3c0d0dfdb31685cc7d429905dd172c917186b569f7abefac8e70ab382c6858. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBAYD8200518.
Debussy: Suite bergamasque, CD 82, L. 75: III. Clair de lune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62e6a969358ae323fc3b3d9eff5549ff8d383455208f938d23c534941c5639. 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/GBAYD8800162.
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7fdfc28143c133e610d866f5f8a405dd51234d840c98b1b50716af1ddc65b6. 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/GBAYD8400195.
Rachmaninov: Rhapsody on a Theme of Paganini, Op. 43: Variation XVIII. Andante cantabile
The Classic Experience - 135 of the greatest classical tracks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa8c61151d8559577056fdf54919d0856f762ccd0cc0a8caaa171f2623a72e1. 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/GBAYD8400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4198035bb88aa3cde3e6bc9f2013e65e08242c2c1e840136a817a78ae93c04c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYD8700818.
Debussy: Suite bergamasque, CD 82, L. 75: IV. Passepied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8735ab1401e502fbb863831b2612c0a2401e33a6d86e872774bbd8b481d7c5. 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/GBAYD8800163.
Rhapsody on a Theme of Paganini, Op. 43: Var. XVIII. Andante cantabile, a tempo vivace