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 0x160999b47d37f9c8bf575755d1df061260c2f435608c2081965afa919d9abd7b. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/234f7355-528d-44e8-92cd-87a0b184122d.json and https://artists.proofprofile.net/proofs/artist/234f7355-528d-44e8-92cd-87a0b184122d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carissimi, Donizetti & Schumann: Mary Stuart Queen of Scots
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 0x4cc069cf3a9c9fbad4fe8e29e935470c4ef41fc0b21889e898e9ff322d4af649. 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/SEBAC9513010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39ad7bf2496e7338063ccab14b0fc107cd46265428ade6e3a6a39c94e101152. 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/SEBAC9513020.
Gedichte der Konigin Maria Stuart, Op. 135: No. 1. Abschied von Frankreich (Farewell to France)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a649d51b7c961e4a90be2188631337b28e54901143f67204f90c2df654414a. 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/SEBAC9513030.
Gedichte der Konigin Maria Stuart Op. 135: No. 2. Nach der Geburt ihres Sohnes (After the birth of her son)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa866802e95dfcd9c98b6253acce9235770ddcc03214445623268e214dff1aa. 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/SEBAC9513040.
Gedichte der Konigin Maria Stuart, Op. 135: No. 3. An die Konigin Elisabeth (To the Queen Elizabeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc6dc3b5b2c0e06e7af070ecf4349649c23843b978ce10e2ee06a091bd5abd4. 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/SEBAC9513050.
Gedichte der Konigin Maria Stuart Op. 135: No. 4. Abschied von der Welt (Farewell to this World)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7737b477607e6f323dccd0fda1bcbb71ce794eeecb59340227bb84ab588c08b7. 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/SEBAC9513060.
Gedichte der Konigin Maria Stuart Op. 135: No. 5. Gebet (Prayer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eee29bb400248864ac7afaacb1d6fb23f9da03c8ba8787c86f382d18e3bea6. 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/SEBAC9513070.
Maria Stuarda: Act II: Allenta il pie, Regina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c638157c223fcb408b0b3d31820e19136748386d533ffd9a50c8f20640e188. 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/SEBAC9513080.
Maria Stuarda: Act II: O nube! che lieve per l'aria ti aggiri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac6b1c755318f682c525a8be99793cd0bde8ffed9c86e665c0f801db2bb2685. 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/SEBAC9513090.
Maria Stuarda: Act II: Nella pace del mestro riposo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96026d71fe9bcfde4fe0d796bd2268adafa38c0c4f7d2922ab1a329fa78c595b. 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/SEBAC9513100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7b2a31672c9ceef35a410564285304c0e7dd12d0ea222f1f71e9393c1e4209. 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/SEBAC9513110.
Maria Stuarda: Act III: Anna! - Io vi rivedo alfin - Deh! Tu di un'umile preghiera il suono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe672615e106fc0d8fb7611cc12d58a04c49395ff16b3e880474e81e9224f0e59. 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/SEBAC9513120.
Maria Stuarda: Act III: O colpo! - E gia vicino del tuo morir l'istante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1198f8a3016490eb6a9f3551d7702252fc588ae77266ecceccd40e86cc83d5. 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/SEBAC9513130.
Maria Stuarda: Act III: Last Scene: Giunge il Conte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e354cffdd6ce79c01216ade7b00e9a14b69b57e39bfaa78a275b4b59d8806. 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/SEBAC9513140.
Maria Stuarda: Act III: Ah! se un giorno de queste ritorte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362d27c8db6e74e670dd518e6611315c1ec2ed971ef9cfb9862344105de32347. 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/SEBAC9513150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88b8f8a7339354b25fc520ca18d6ae090172f2de8e9b43eea893c67e0319e18. 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/SEBAC9408010.
Don Giovanni K. 527: In quali eccessi o Numi - Mi tradì quell'alma ingrata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c438dfeeda90e8da188371d7a65b6da030492e95fa83b4aacb907c06689070. 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/SEBAC9408020.
Don Giovanni K. 527: Crudele? Ah no mio bene! - Non mi dir bell'idol mio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c1d1d88340b3bccf14d79ae2eeca155305880f795085662a0340634abdc9c4. 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/SEBAC9408030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d6e1d0c6d3056711f1771ef362d5969b624721efddc4bbbdddab7d65086d8b. 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/SEBAC9408040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb54bcc4adff6ea8804c6890208a4e2c56260ca54f6b6fa7144cab53cb371909. 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/SEBAC9408050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d31079d934cdec94dafe468ac65074111ac85ec8eac5de9c5497e726263033d. 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/SEBAC9408060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a206d4abf00b1a2852017967586a8117523b9acd1c76f06dfecd2a14ab717b4. 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/SEBAC9408070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbdc20874d7016b863d573f95661109a7c25e7f75a633bab08e60cc2abecd82. 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/SEBAC9408080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4412247fa1e4ac405fb771e1ab126f360cfeeebf96d860689edf34dfb3312c. 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/SEBAC9408090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de9ff81a96fb0e29a84ea01a89fa266fda97ae81a9821296117a18211f589e2. 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/SEBAC9408100.
Lamento di Maria Stuarda: Ferma lascia ch'io parli sacrilego ministro!
Gedichte der Königin Maria Stuart Op. 135: No. 1 Abschied von Frankreich
Gedichte der Königin Maria Stuart, Op. 135: No. 2, Nach der Geburt ihres Sohnes
Gedichte der Königin Maria Stuart Op. 135: No. 3 An die Königin Elisabeth
Gedichte der Königin Maria Stuart, Op. 135: No. 4, Abschied von der Welt
Gedichte der Königin Maria Stuart Op. 135: No. 5 Gebet
Maria Stuarda: O nube! Che lieve per l'aria ti aggiri
Maria Stuarda: Nella pace del mestro riposo
Maria Stuarda: Anna! - Io vi rivedo alfin - Deh! Tu di un'umile preghiera il suono
Maria Stuarda: O colpo! - E già vicino del tuo morir l'istante
Maria Stuarda: Ah! Se un giorno da queste ritorte