thumb|Paul Lincke on a German postage stamp, 1996 Carl Emil Paul Lincke (7 November 1866 – 3 September 1946) was a German composer and theater conductor. He is considered the "father" of the Berlin op
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 0xcc24097334d7ecd857b4b17675cc45eeed63aff74b0a3b197ef7e649ac852862. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91b56147-2831-4147-8fac-af48dc6e9e6a.json and https://artists.proofprofile.net/proofs/artist/91b56147-2831-4147-8fac-af48dc6e9e6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xe4cfcb53f0f1b2b4ccb37f2fc914acc6b13518adc06094c213c1233eab83f5ce. 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/GBAJY9799804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdea41bf9dd3c639c7ed5700fee7aef4e75eea2c6628dd80f148ac4ecfe91ca8. 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/GBAJY9799806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e71fb9ebace4926a657fd4b3d06591c01f540ab590a1a2934c7f727196db5b0. 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/GBAJY9799807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af793fa332a25fff7edf40c3593fbcacdc58210ed696f06503617dc27fcc99. 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/GBAJY9799810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ecb79db8395b3ce2ed64aa541f47688b30b9662abf085c72d189c3112eb3a4. 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/GBAJY9799811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8683335494d5c5cfce66084f81d3e6332e8214e4bf828d84d88b870f8c5b4ee5. 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/GBAJY9799812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f12081781db616fba32af04e1525bc44a652a5cf609e52cd7490dc69b0434. 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/GBAJY9799814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1507dfb3cf6aeb572d48be34317192711270de2a88b346d000ec0fa8f4e06e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBAJY9799805.
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
Lysistrata (Operette in Zwei Akten) [1940]
Glamourwelt Berlin, Vol. 2Das Große Schauspielhaus - The Great Schauspielhaus From the Weimarer Republik to the Second World War
Lincke: Frau Luna: "Schlösser, die im Monde liegen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb04d1dcda97ad2993a0ee515f586032c010d66652172fd80b77391c86ca5b4b. 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/GBAYC8601884.
Lincke: Frau Luna: "Schlösser, die im Monde liegen" (Marie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b78b64d780b2ac4dfb97c48ae2c66395a150e77345dfeb3b08acd5a7d5afe. 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/GBAYC2302045.
Glamourwelt Berlin Vol. 5 (1926-1942) From the "Weimarer Republik" to the Second World War - The songs of old Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0321a58370594cd513982a0fbf23eb0c2bcf38f5dc9cf5edd2dbd415663a6e6d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEL111200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40260a04adf5dbf8fd03293acf986451bcda0e4754883f8d6d57b888c516de47. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEE860000871.