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 0x2f4fe7878ca705d111dd3e548015250bd40a436f4b74744035a28b0b21fa9e53. 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/177779e6-7850-4f41-b7f4-47eff7c89eef.json and https://artists.proofprofile.net/proofs/artist/177779e6-7850-4f41-b7f4-47eff7c89eef.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 0xe11be34063c1028a47582a846d54f08240cc060e3387fc55af017a85afd7cf6c. 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/DKUM72100567.
Vi Vil Gerne Kysses (feat. Lis Sørensen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7440ca9b06e07553881ad400a4abb0fb4a96e9dbc74cc8aa55b53c0ea8dcffa. 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/DKUM72100568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1d3791f210aaa7e18eefb44425a531b5969b1c9f101703acbda8a048fb4fb. 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/DKUM72100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e1939d076b637fd4f42555868e5ab4294a66e16177d79796286b3d1cb785a3. 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/DKUM72100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa71f0cfd252475aacab1bd99405fdb1a627205f6a7d3f1ca20347a65a6074. 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/DKUM72100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232c217504316e2174d676a8580493826fe1d4f2b90fa5b5401480b7a42103aa. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DKUM72100570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338505685017bff4788851467092132bcfdfe3d1bcbfd21c5593c959dc331754. 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/DKUM72100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf28b54bbd7b92bf1b76c9da1d52984541725bea831c725ae70f0b6c222d60eb. 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/DKUM72000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a78c6eccc36456fa2259d89d952fdb4604fcc4c548b7997fc8b966da59337. 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/DKUM72100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcef74b68b68ee9f1c5dfcf4d0825f1ddea84e822949e05da1304a48364fcc7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DKUM72100572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996c42e1bf04c48131d0de9a0e60ca52cd314b90df04e4c6943118953aa66e44. 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/DKUM72000578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e1939d076b637fd4f42555868e5ab4294a66e16177d79796286b3d1cb785a3. 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/DKUM72100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a78c6eccc36456fa2259d89d952fdb4604fcc4c548b7997fc8b966da59337. 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/DKUM72100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1d3791f210aaa7e18eefb44425a531b5969b1c9f101703acbda8a048fb4fb. 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/DKUM72100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798f2b108a1fc6fdca30de612d94080d57e5596f2b5431a486a8b28b6a541013. 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/DKUM72000794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf28b54bbd7b92bf1b76c9da1d52984541725bea831c725ae70f0b6c222d60eb. 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/DKUM72000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996c42e1bf04c48131d0de9a0e60ca52cd314b90df04e4c6943118953aa66e44. 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/DKUM72000578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c8ab7a5a066e6314873d02ecd82e1b4ef7b66b8df68b3f6c40eb5285779f87. 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/DKADG2000655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6f727382b36463306fa2374591b58abb58db5a49115b1291965d22eb6fb38a. 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/DKADG2000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a316a566eea3538d650d12ecdf00af965a49e68f1641f91fc3be55d516d3f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DKADG1600269.