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 0x4e24eda0a6b94b79accd56ac06efb2cee9fe13d7caca9a9c9d6debc0533dec2b. 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/02f2ac6c-4f93-4e4a-993f-46bc27ebc871.json and https://artists.proofprofile.net/proofs/artist/02f2ac6c-4f93-4e4a-993f-46bc27ebc871.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 0x1b98d0e9099a0fcf1d671f7c1de98f60d71e45fbb5c3b02bf355d05496ebaedb. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEZ651709736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842fd22551210166b9d424376618a8a44063118330b0ce18f38a7afda1e62c4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEZ651709737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437e7fe7e8d99481cde4f6b8873b48389f8c8c22031e771fdfb05120e823938a. 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/DEZ651709738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621a49cf2bb4a96f8d518af65b56e90fc4e8aecc35cbb73c002e7505f6af6ac3. 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/DEZ651709739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb375a9e4117648239475b4ec52e55d6066adc662dd3aef130a35dd93c3ad8753. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEZ651719732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4174e62f8093f9b83cffd2b274546eb5b7c8480e73aa4417fcdbc1cf78fd62cb. 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/DEZ651719733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c9b9b91158f1a8c1c1af6f485a35b99270af44670cbe370fa823007628ab02. 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/DEZ651719734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf143eebb884a64091c7ceccbc8667d335c8a28fe5391cd3b706ade1c19f5494f. 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/DEZ651719735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502fd717660082b4b776f79629d64f8344531da8a25014e0cd69a23e9ce87eb3. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QM4TX1872064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40c0533324236b27c09fbf5361ebc1cdab4478d8763df6f6b3f838a3c1c2222. 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/QM4TX1872065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c841ce1157ca7e49d45b6a3c5cb4d4154f0173c5be8f0c4d22c268dd37569a. 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/QM4TX1872066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e95b18fee710b50e6bcc799c6e40b235a730343bf6ed1821668471f9f3ff96. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX1872067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14aa533312bab8c84091536644f960105eb8a818ebf79f5d69cb58f9e19450a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPH11900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1554edb81286b3cc267afbed0126be03e3e61c328422456951ee259d3b2fdb52. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEPH12000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff05014d321462ed90a508d6146b0412ea009a7a90c69a6b1c54a6973355c675. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEPH12100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7f685b9c42c177c697dc7ff5aeab03b6f62a6fc34ad7ffe6fd5d443f0c55fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZ902000703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40ea0fc60617ec935c5b74f5a7c64fcc897d68ec5bfdf595406b63a9d906a5. 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/FR96X1991550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcb6409bc6553df26103d520c4b41e105f6ef9d95ca11e76905c993ad6b0e3d. 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/FR96X1991551.
Nur noch einen (feat. Joey Bargeld & Haiyti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd642deb7a97bba671daea6ade6691e85d469c028fd0ea37b8d22c973a3bf3358. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZ651712151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4c514f3e5016b1a9278ec1ecb83fd4e6ee7b702f785ce4ee4ed0a875914511. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZ651703313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3ea1caf3a2803de638b121c75ccf96c567841dc58bee039de4ef6fd72e5f6a. 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/DEZ651601072.