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 0xc9507ec658978109875054f6acd4825ff134cd3a7fe324ce1389e78e023dc72f. 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/04744cba-0962-4aa6-b40c-98ec885ba15d.json and https://artists.proofprofile.net/proofs/artist/04744cba-0962-4aa6-b40c-98ec885ba15d.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 0x4a0c26b868d249d9b15d6140db6071ee8ca1a0082543c4a224db0149dcfb5594. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811600385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e4bd650786867c615e68c4f422a9e6fcb3500da4bb8049fe11296481a37a2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEA811600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a901430aff9d79e959368fa6e202d59339f423a1e726dd568cc4dc708a7d3c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEA811600389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f3ef9b9d88dfb51d950db85c06669b8d1ac8492acfbc2a56437daf88e6c5a3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEA811600391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8e7620393e43b265b8983be956644adff0a8bbbda8711451ee2e7222227b6. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/DEA811600392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3fbe1d955202cdbb3da1889019b8980da070b777a161fccf856e539c0ad66. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEA811600393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f3f38edc78c98db57ffbd05626f776cb4057dcafe94db4cbfc3f258526693e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEA811600394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f5e02c8c067927ace8d915d7fee1007867b238492f19f3053c516e527f3571. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811600395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe822a5efe87023bd5551f559e0022319abac1352be23456c74ac933387aa6d98. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/DEA811600396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95473f1148c2699e5494c9e2c6780679a4a75e0a7657b34a3134838c70548b2c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811600397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ddf0667fad1539433b9dabf46f768c8bba78ff512b43a11185c7efe6654e6f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA811600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d7865f376399219daaa79b781d13b61d791ce3672ae25a9fa9aacc70391a11. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e813aba3f14a32ecbcd6006405103d3731c9ca286d5064216b3bb70a1d3eaa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEA811600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a988728170d04e439317192fd800d4d9dced7ed4a29b9b5252e90a2936c9f5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEA811600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ccf56193f9caaf4306d8ff1235cc8840408cb517a3a3a652d3e33de453eb20. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEA811600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6030202de7068a4408c8414fa68ffe6bac1946cbc668e32a416c9aecd576cb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA811600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1fd3a0db608ce86b9d5a1f553a145e9b289b2f345d81808073d3f8d1d9d5a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEA811601037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2b5d379977a0d8815fd81a84647d6b0070e20b5c9ebc67cf25149d8727a48. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEA811601038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89045281285d3a556ea5a9772de53a1cf23843fcd416b992fdbd8b4e4fda1e0a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEA811601056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500580370312b49cbadc674bd7836318ebfa6b761180c7922470013316edf5b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEA811601057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123a4af712a4f87f21f17cacb17af08353e01ccdcf8f66ddd4d894ad89dadca6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DEA811601059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad53b05a547bf523e81b3cdfd08e81c89a9c76e5ab0e18c83592f72171c5203. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/DEA811601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef5f432882c907a1e111964209113d4b5873af56b64e0fd0cb5263cca65003c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEA811601061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e99c88d3ee02779cf3164e6ad9c218b57b118dee6790e670245cdd01e7fe518. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811601062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be11c72f8039b9c16b2aa7324accc8ee86ec4b4d1cfb2c0c73250f8930d2a3. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEA811601063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78ba9722cac047d442d63c3ef08edc3bfb5a03428eee26f958b57a2db2f3e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEA811601064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f50c304bc2e8185bf239fa4076709f232c3451c8ba4f37242610df9b609d817. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEA811601065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4a8d3c60cbc699e5309ee1f20065efe35561fdc8ec25513dbb3720cd4855a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEA811601066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b41fc6d197a6ca83414d72ae78386ec38b8c69933497b41812bc9f0b25cdb7b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEA811601067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3c51e1b48960b8d4d8620fa4975f8742ff72683bb7953180b1c03947554dfc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811601068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b65adc13bf4fb47e436d62809ea2739eff22f0e56a09f38aab9106c1940aab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA811601069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b241e1f018f1a64933fa8ad9de36311babbed421a7925644b37df638a3d463. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA811601070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8130e66fc538716430ebb9148a4b95ca5184637d9b9b094383198e5dd45ffe9. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEA811601071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bed976618abfe381c1044e66ce3f454c6da7846fcb0ed421538fb07ac7b5d4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEA811601072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca21c9bde0622e1a1b83d322ac491493658dcb997fe2260e36266218b6f2177. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEA811601073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28501313f1a477b59a5e04f380bbcdd6b04385a4fa9d6754f4afa9f13285d4a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEA811601074.
Chris Tall: Gewinner Typen und Looser Menschen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01ab759780cb83f4b5b424d530fd4c4822b00538d0c1ca6848c30a7557af283. 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/DEXN82435990.