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 0x964d19ee57a66821165833e8baaa81f79622ddaefd5e4db26bdb46bee0807986. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/509c6d41-b927-4e87-a50e-08c8e9760fb1.json and https://artists.proofprofile.net/proofs/artist/509c6d41-b927-4e87-a50e-08c8e9760fb1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Chausson: Songs (Hyperion French Song Edition)
Mozart, Henneberg, Schack, Gerl & Schikaneder: Der Stein der Weisen
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 0x400cd9efd8572aae57aa50d5f4ee5bd82d91159c665866457c25a9550ec7a388. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10701508 — a six-check JSON result.
Der Stein der Weisen, Act I: Introduction. Ihr Mädchen! Ihr Jünglinge!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81375cfcf6f48b3de3b5d0a086bf08a013e4995549a68739907d0dd8a547c89e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10702508 — a six-check JSON result.
Der Stein der Weisen, Act I: Dialogue (1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17019196ad3ea6d1aad74d76c98cd5b87b8c633ec2dbb68c6947ae3dd1a5bf90. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10703508 — a six-check JSON result.
Der Stein der Weisen, Act I: Aria. Alle Wetter! O ihr Götter!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66553c489a364f460036297fb3402a32ed0246a89a0e1a5c71e501aa2f2e99f6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10704508 — a six-check JSON result.
Der Stein der Weisen, Act I: Aria. So ein schönes Weibchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ab68a65031fe91b051dddd2ec641af819d5f6d9370b574b3514ed67859590e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10706508 — a six-check JSON result.
Der Stein der Weisen, Act I: Dialogue (4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb87097d1f2df9d0ca555a761cd5c18eec88f0cea3c7299090bc4d12d8c33c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10709508 — a six-check JSON result.
Der Stein der Weisen, Act I: Duet. Tralleralara! Tralleralla!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e271a88184271f933e125d3ffc00f35856820eb6713d08589624a7cf5b21bb9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10710508 — a six-check JSON result.
Der Stein der Weisen, Act I: Recitative. Du bist erhört! - Aria. In finstrer Höhlenkluft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7be4f5180e9edf5cf74be9678245c58c8b61e9f5d53e6a81245e4f4ec2f11a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10712508 — a six-check JSON result.
Der Stein der Weisen, Act I: Chorus and Solo. Seht doch! Mit gold'nem Geweih
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8cf1dba6448752bef0a9664920259d471df54c02086d0942ac9c9a00ef55c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10714508 — a six-check JSON result.
Der Stein der Weisen, Act I: Aria. Ein Mädchen, die von Liebe heiß
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad7e3e38581d9486f1b098a96a88643e34a2d639cccb7c3f8ec6e4b77ea318. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10716508 — a six-check JSON result.
Der Stein der Weisen, Act I: Recitative. Das wirst du nie - Welch fremde Stimme hörte ich?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1420d3d68ac3196c1e7d6549da589c3a0dfbb6e50f40d0c7333bb70b7a4b3697. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10718508 — a six-check JSON result.
Der Stein der Weisen, Act I: Seht doch! Mit gold'nem Geweih
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047acad2c9e24b4ece06b2550caa1726aa375ad800cd19bea0982c9d5a5207da. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10721508 — a six-check JSON result.
Der Stein der Weisen, Act I: Ich muß Nadine eilig nach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45e307873f4fc37b979a39b1e63cd375fc603718637a58bcbcb3bf232e8ff68. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10725508 — a six-check JSON result.
Der Stein der Weisen, Act II: Chorus with Solo and Recitative. Ach, Astromonte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bef3786d68f55b543fbacd0d2bcb74353584312c3a829c320584d1895e9196. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10728508 — a six-check JSON result.
Der Stein der Weisen, Act II: Duet. Nun, liebes Weibchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f4f270803e7f2d307656f7519db247e38881379d0fb9e12078272bd1f7f4a7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10734508 — a six-check JSON result.
Der Stein der Weisen, Act II: Chorus. Astromont' stirbt durch uns
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5796f4d5dd0d722ab7b710a7baaf5520ba41e897fad7f8644b86ae0dc1dd883a. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10740508 — a six-check JSON result.
Der Stein der Weisen, Act II: Finale. Miau! Miau!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58f10a28c3420229b7e133e7ae2527f97cb034419b5050a8de7662832a4459. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10746508 — a six-check JSON result.
Der Stein der Weisen, Act II: Fort, armer Jüngling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9800d5c2d5d8dc933a2311fd74b29024af05152b19ae2da1a1485b802b3d7762. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10750508 — a six-check JSON result.