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 0x9883845bd531ed7fd05120f5523ff243e1fd9a4b8d7dc51565a9800eb8be9478. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69371c70-5415-4ebc-a5a9-bd268a16b446.json and https://artists.proofprofile.net/proofs/artist/69371c70-5415-4ebc-a5a9-bd268a16b446.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 0x579c1405ce55ac4170185479af02148ac778d797bafa8fe9c594665a3868f694. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKET52200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7af1984a755068e21ed133dd24abd9c33d903eca87e094c37d3b4ab64a2b832. 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/DKET52200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef84ff11ea265185787731a705500277418ca0082600478a8671182477988d24. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKET52200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2670dbf88d8a0ed09a923019ddd22e25dfa99b5031e1b9e8635b77c22136688. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKET52200102.
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 0x6e7a2680536470a856e4520d9f6c4b54b5f93c57c5d5c291f3c8e3425c30f66f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKET52200103.
Four Jacks Medley: Mandalay / Æselsangen / Tom Dooley / Bare man har det godt / O'Marie, jeg vil hjem / Personality
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76047a3e73e17307e3ac36c745e9fc6763d75da887e3395ce0b71e2b4ce87b98. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKET52200104.
Dansk Film Medley: Hvorfor er lykken så lunefuld / Det er sommer, det er sol, og det er søndag / Musens sang / Lille Frk. Himmelblå / Du er min øjesten / Forelsket i København
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c2436888e747f6f34b8588459e3cffc6738028e6286dae3855fb0f9447284. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKET52200107.
Kelds Danske Grand Prix-vindere: Ka' du se, hva' jeg sa' / Hallo, Hallo / Disco Tango / Sku' du spør' fra no'n / Krøller eller ej / Kun med dig / Det' lige det / Vi maler byen rød / Under stj
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83217ebdcc8ae68ba3ec72422e6e1520e5bd801e4ff648c7a62dd8497523469a. 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/DKET52200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafeb27be3abbbdd961befaf84caf020f6e0e0678aa3a1b88bde37238879c2b7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DKET52200112.
Giro 413 Minimedley: Sol, sol, kom igen / Susanne, Birgitte og Hanne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5fe84f031994b8fb8d325aa2f748f8c8e034bd63964a5ba9600c730b8e328f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKET52200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6370c6fcf2848ba5d4f0906291254e49d830346df9954c63be1916ad5e1d8692. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKET52200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850318ef93604fc78f2566dbbc020b1b3b1cd622a9613f7322424b6bf7274f5e. 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/DKQTA8100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b475723bad739674e451b03af08a9b37ae763492ffaf30bb2ece381f0d64338. 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/DKQTA8100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49bdcb818b5c12de69c1ce060d952ad78209c5d5964179676baeeb20108985. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKQTA8100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b98918823145dd63db92f5a7d7186e18486032e4bcb18395b70186113179e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKQTA8100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396f25fd0db5c977d1e8931932c188a449986b04a64033993064cc7803267d1. 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/DKASB0300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cad0bcb210402b4f828b5a54bdb2d44759e4aa5ec6fc87f2584802cb03d92a. 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/DKBV79600512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbaf187db123e3ef08d223d2ecb2c3856cd3d4b59cfcca7a9af2cc5ed243d99. 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/DKBV79600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebb41a6bbc6f998bad836548e32f7e13442918ddc63ed41910653b2dd4b1e72. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKBV79600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb975205d4e80d121e12f7c67501e0d8289bf38703d5c7ce1ca370fb3d282d826. 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/DKPNH9900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509d84a70c81ae352a35b797c8fb8cdabf8d0378bbc8e86b06dee1170868eeb1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKPNH9900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35621bfa0df013ca7052395597afd78dc42ea487f66e1abfc10eecde0d207de2. 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/DKPNH9900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09fe27846c87896b2763f122f64fd8cc1820fd1f6d38553b5e4ab873472bc1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKPNH9900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a54a17a4e3335033b96f01eff065eacfa8d6e6c97d069961f76ec698e5c8c23. 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/DKPNH9900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112547f7b36fee0dc93119c6a324d538df061f0992c75797559fc8859cb9f9a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKPNH9900210.
"Du Er Det Bedste" (Du É Det Finaste Jag Vet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73b8a0d499bdcf52ea0d5132b085804c113aeaeaf11969369d80c43eb1e5bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV79400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4608e6e6da6bae9d8d5d2757ea637973289f906974c3769ef296a953376f46b8. 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/DKBV79400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ea899c27bf3ef060e41bfd1bac7af8b256d0da6cc30c5ea063e6cfa28d2c8b. 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/DKBV79400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8db8924fc8407ebd8886906c065c1d56bbc9504c443f70a806c93eb00c774dc. 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/DKBV79400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403ed7f2828e10133144e6a1a08c7ed65ad9522d4a169602403405e0f632233f. 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/DKBV79400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3535dbba54eb933ffa5410ea63f8b232b0b54beba33dec9a3b2badc5ab4325. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/DKBV79400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8502987a252e00ebaafdee579d1bb740f24810b91816c760962c00cfc89839. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKBV79400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382e5022d68a3d7812e6873a8ada5ff070c10ed16036229a455def12c0212cbb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKBV79400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed810fffbcdc8764f4cf910f7b337c1a17d7a9fb8abe49e6852a43ef226b21. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKBV79400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188880799f2bc4ad516c1c91b7aa4a4981f514aeba70f607005d82e02fcca9e1. 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/DKBV79400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bd0d33c1170d66404e8c4926e93632f5b3ec0f399c6445f08c7757e95d5713. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKADG1600223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd02e7ff0284ccfeb68ec82e5bc1e36ce9ff50a4b71b3eba07ea3ea7392ef878. 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/DKABA1000793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad685a801df78a11bbe5de6b1b7fb5627ee1fb48b4e22b948cce15cb70a5b382. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DKABA1000792.