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 0x8e07483d1e60a400511d533f1d10116aeae40d1d4adf3cd532b9179620d44cbf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85bc84f0-cf7b-4fad-8d27-816468e0f7c7.json and https://artists.proofprofile.net/proofs/artist/85bc84f0-cf7b-4fad-8d27-816468e0f7c7.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 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 0x677c3b895cd2659ff72913c826d46b18d24006dd0519aaa8b9f91a4c4ee2e960. 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/DK4A71700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04dffaf317d7164ed936b0ec12ae3817a64815918107f5b9119558eb4d5b4db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DK4A71700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dcfa86a717a9b2ad6dfe0e8cdb45a9a19428c640045cb4c683762383a863b0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DK4A71700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176acc60a318ac66ce676e8b0970566d72594b026f84580b31d4c7702b2943a9. 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/DK4A71700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e3f64bf11dd539d85bf9ac6221648bb1d96e03168ff123b7c649dd8db8f06. 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/DKES21100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2853aa6f81528026c517ebbb75deab5e1898d6c851006b1c0c0f89c4c0c29a. 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/DKES21100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98707081e3173f95caa6dd18e9ebda431b9989b452e465af4bee5f1131784483. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DK9M51500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a10c1f015ba84cf34c7600ee084e6b053be6c193f4e5436f01193bb5e6b39. 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/DK9M51500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47152467c8b95bf0e400cc23a5449270cbe306d846c70e8228ef519359072b36. 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/DKDF51930001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d6e49ff851621224578e0af2af70a6af641e899a085fa5376e53e941418bd. 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/QMFMG2303622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da442f14f3fa0256590d95aa1a76a3c07dd394aee070b612bfbe0b366569215. 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/QM6P42362719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c17ce23c310a6d99b4c2bbf06eade4254738ec2a9fc57ff72befb3a9de0756. 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/QMFME2295459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a38353f9e1eda5db984fb141afb77fe2de7da749c66c61b9941826c590bb0a. 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/QMFMF2102539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd038d3240c5bb9e18138f3785253f7a56f8520200de717e2fcc692dcae5fff0. 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/DKADG2000643.
Anders Blichfeldt Synger Toppen Af Poppen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d39d0818ce0272db5c88ad4cb251b6b4336b72df36a12a60d29b98c9e4467af. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKADG1900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8046a03c15075df014ce09d02c19f3aa6d1f3c78d9f2b607313cb104a63128. 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/DKADG1900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d653051ccbf6c2269c69e6e23719cf0cd16f5ddbad8d2bc04206b4a289efa1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKADG0402415.
Lidt Mindre Ensom Nu - A Little Less Loneliness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15860328811dcba30c6d0683bdb1541a310ee28e29a9d600639a5116d03ad102. 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/DKADG2000652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fc34a762409f24fa0193f561e48d718394ce54a598ee288c773a5276e1bb33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKADG2000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf294c2a4952d235606ed6731f142f81863d3cf6143e553955f465878e5016b6d. 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/DKADG2000638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de95266d779d2e5c9ab1f1018bb3f705c7df632a9df5562df453266e03addaa. 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/DKADG2000640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd038d3240c5bb9e18138f3785253f7a56f8520200de717e2fcc692dcae5fff0. 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/DKADG2000643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bde50185052c8f6d482b99c92b4e01eb76f6f98b32f10c6ea34258820c04220. 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/DKBV70402601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5326d9db3650af4f0cd884a12343d3cc9dc35646eea819d51ec024e42bae4b. 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/DKBV70402606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc958688402230518d3236445dd622013e17370eb612b41ab5fd0a4470f837da. 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/DKADG1900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d754a583a9d22b8905bcb04ceff5cafcea2df5e337842f26557869c68634b4. 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/DKADG1900348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bd21501e52025d9470c0dde132e26a2dbe9eac16e5bd90c1068f62a1b27841. 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/DKADG1900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82ad2829be2e399cc7dfb70b431410e54d7f2a84719353f1bf124fef74f267. 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/DKADG1900338.
Toppen Af Poppen Synger Carl Emil Petersen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d39d0818ce0272db5c88ad4cb251b6b4336b72df36a12a60d29b98c9e4467af. 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/DKADG1900321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc8d3c2a2c9c0828a238db8864d7069e58dda57ada478479e3a74ab482d6270. 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/DKADG1900322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfbe4bf96a8c74242ba2a24760d3e290ec110fe4fb7175436932bd94e02f721. 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/DKADG1900329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5b685ffea8f468919d83287bf93b773470916c5128628f5bdcf67f47296813. 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/DKADG1900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4994850ed841a5c51d56ef99fca6e939f11ba15c683932230b6d2e0d8ad43639. 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/GBLPF6679110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ac0e409d6e4d97de14c3b1bc99689737262a660d93e497f9e90316b1f5108. 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/DKADG1900352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2526d715755c412c3a50215cc5eaa40aac8bd4b50244fd948219478697a1875. 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/DKADG1900342.