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 0xac5d9f0aaf65384fc2c757f410d60a69a8a0db906344cde4ca14718f4b690310. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95940ba4-f5da-485f-a120-374ca584858f.json and https://artists.proofprofile.net/proofs/artist/95940ba4-f5da-485f-a120-374ca584858f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das schlaue Füchslein, JW I/9, Act I: Mělas dělat podlivá mně (Live)
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 0xbfdc054868c98ce6a636f73432a84e120141ee49981ccca256e9006fe941ead1. 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/DEU921998206.
Das schlaue Füchslein, JW I/9, Act III: Běží liška k Táboru (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7199129705765241022408cd769c1a8b5091b29bf2ed67b87d286470f3810d82. 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/DEU921998216.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 3: Nur deiner harr ich, niemals Verlorne! (Paul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c0a33795de3fbe96af392c11b53d6bacf4a95890434d30cdade2b68d38369. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEU921194803.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 4: Rosen, so ist's rechts! (Paul, Brigitta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a6eeee60e2e4f450f11983df73f759ea3874cd0574992296c96d3465eb9d85. 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/DEU921194804.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 5: Wunderbar! (Paul, Marietta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342fd4054fae59f75e587ce5ab862ac506d1dd06bd12c936911596fce9706ae. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:16:37Z), 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/DEU921194805.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 5: Gluck, das mir verblieb (Marietta, Paul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2dcc43840da5a41d54e1da056dcee7b18cab79b163b3c85c03203ee73853bc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEU921194806.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 6: Da bist du ja, Marie, ich wusste es (Paul, Marie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c9888a15bebc97df51d364babd8cb228a321e67f48270abf5f10f7fb5bf01c. 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/DEU921194808.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 2: Wohin!? … Frank, du? (Paul, Frank)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb2634e5b656e59dc4ebeb9388cd4ebe899db26bd62521b496cd1e8943cf451. 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/DEU921194811.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 3: Schaume, tolles Tanzerblut (Julienne, Lucienne, Victorin, Graf Albert, Fritz, Marietta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca216c1162491e4f87aba0266da43f5627c39068da1694e862881e9e8bfe01. 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/DEU921194812.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 3: Mein Sehnen, mein Wahnen (Fritz, Women's Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37ea7dd2062c3e8cc986cd1acd430a5506d85b190bea0140a1014860c1ed972. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEU921194813.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 3: Bravo, guter Pierrot (Marietta, Julienne, Lucienne, Victorin, Graf Albert, Fritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4911636b16487abb376eb3d33620f194eee0064a75ff3cd1d6717372f459532. 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/DEU921194814.
Die tote Stadt (The Dead City), Op. 12: Act I: Prelude - Scene 1: Behutsam! (Brigitta, Frank)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2cbd4558a7dfae3e98acc1c3be8c09a47fd5db2e99887e3aa12b5fc13b3196. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:31Z), 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/DEU921194801.
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
Das schlaue Füchslein, JW I/9, Act II: Ach! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad76652ada3dce03172cb2d0ac34b5fb955174fe492bad8187b3543aff8258c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921998208.
Das schlaue Füchslein, JW I/9, Act II: Zlatohřbítek, lišák s kroužkovými pesíky (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d4ef8eed1f6a9e06e888d13798b42f73e9f8da4a6c406dd8f274630b759fc. 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/DEU921998213.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 2: Frank! Freund! (Paul, Frank)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ea65439cbd11b7513cae913b7a4dcd95771a67df765914e77e3d458113dd2d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEU921194802.
Die tote Stadt (The Dead City), Op. 12: Act I Scene 5: Das dumme Lied, es hat Sie ganz verzaubert (Marietta, Gaston, Juliette, Lucienne, Paul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3887d01fbef834e16ca14305699f762981da9c611e096678d59bc64a865ac9e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEU921194807.
Die tote Stadt (The Dead City), Op. 12: Act II: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01dca7cc5e120963e2eff91d7d688ffa00e21498dfc8c1c5e41d266e7db5c42. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921194809.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 1: Was ward aus mir? (Paul, Brigitta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b3600b63c623f1fb32fff73a784bbbfcf31cc266cafe4d68e332d24f25a0f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEU921194810.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 3: Halt ein! Du eine auferstandne Tote?! (Paul, Marietta, Victorin, Graf Albert, Fritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca625a92919fe7d90bd5867488569e94cbb367e6847787241f77d333e63226. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEU921194815.
Die tote Stadt (The Dead City), Op. 12: Act II Scene 4: Du machst mir eine Szene? (Marietta, Paul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e21d40c271a9025e3dfa13a698bec4c8d6b161415ee320da0ee83631538c97. 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/DEU921194816.