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 0xb27c7e8c517b03d7ec15742a9355d60f7d66b171404d6d5396d432367fd6e6ac. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ce80afd-1b77-4533-bb7a-3aff648bdbb2.json and https://artists.proofprofile.net/proofs/artist/2ce80afd-1b77-4533-bb7a-3aff648bdbb2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Totentanz, Op. 12 No. 2: I. Erster Spruch. Der Tod
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 0x72dd6ba6f14b6428c05840984c539d2418e978fbf42b4eec03657b2877a2cadc. 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/DEB111607401.
Totentanz, Op. 12 No. 2: IV. Vierter Spruch. Der Edelmann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d322e58a577223312e5cf2ab0456e9ac53010dc3808ce24d667096366c97b3. 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/DEB111607404.
Totentanz, Op. 12 No. 2: VIII. Achter Spruch. Der Schiffer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a83c995cc3d08be348cedef20ec679e7e2d32fceb92731404ce73dc4ddb827. 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/DEB111607408.
Totentanz, Op. 12 No. 2: X. Zehnter Spruch. Der Bauer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b4e079e9ee36afb360f5dc15594247ca6f6ecdddcb67934e3fc23d6c482a3f. 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/DEB111607410.
Maria durch ein Dornwald ging (Arr. W. Gentner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f72b6c42dace2994090c8d45621983da2797ad36ed3c7eb85f5bc27133f4c63. 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/DEB112002811.
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
Totentanz, Op. 12 No. 2: II. Zweiter Spruch. Der Kaiser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73120d19cb3cbe320f608cc96820530d22abaeda872f99d0d1f00fabeadc24a1. 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/DEB111607402.
Totentanz, Op. 12 No. 2: III. Dritter Spruch. Der Bischof
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db1856d9ee0a346f32fb16c15b9426e31a019d4a5494d195a26964fed4e9ac. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEB111607403.
Totentanz, Op. 12 No. 2: V. Fünfter Spruch. Der Arzt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2041b06acc5eb4d6a7ba33a806f5bcb82e2d05895bbd59feb9810809e29c1316. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEB111607405.
Totentanz, Op. 12 No. 2: VI. Sechster Spruch. Der Kaufmann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ebd83ab73a0de33b5af5aa894cec01a89b4cf585fe3c1732565a3dabb0b4b0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEB111607406.
Totentanz, Op. 12 No. 2: VII. Siebenter Spruch. Der Landsknecht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2188f247f144eb6a04683de24d64e8f36e2a25599440bd836659e51c5e7450. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB111607407.
Totentanz, Op. 12 No. 2: IX. Neunter Spruch. Der Klausner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a6a3951351df28de071f7379cb23b9363d9519b3f8704f9403230b030a1fb1. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEB111607409.
Totentanz, Op. 12 No. 2: XI. Elfter Spruch. Die Jungfrau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8306b7d86ba5edee6ff2cc81fef711b5358695711579bd593d84464957289e7a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB111607411.
Totentanz, Op. 12 No. 2: XII. Zwölfter Spruch. Der Greis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f60e5617f7d7338eb057259adb5bae389bbae1971d98c300130a7d0a775e8b. 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/DEB111607412.
Totentanz, Op. 12 No. 2: XIII. Deizehnter Spruch. Das Kind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdb13160a6cd812cc2d147b0c405de62d9e6a8024909add5b25511629b024c6. 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/DEB111607413.