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 0x8d8f4336da250a76e416b3ff75e92ce4a47fcbfa0f0dc7fa601ae36d7016851d. 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/8b282c9a-eae7-4c99-9a14-e5d75ec150ba.json and https://artists.proofprofile.net/proofs/artist/8b282c9a-eae7-4c99-9a14-e5d75ec150ba.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 0x6e32e662880157e13ecdc24565125d9f67276ea54b710b465457f607c4d7c0a1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ATDY91700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb48280cc2d943f87130a35db0e3c0cef5fb64ef5f7b35a8bf23e4d8d1ff1367. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/ATDY91700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279b14bc9278a9f26143a431533234b06de57045726c7acb28fa0e64b73837d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ATDY91900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bead4ca8930a959b762aa17ce3a648e3a2032311715d04bf928164875932a6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:30:26Z), 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/ATDY91900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d3267827b02283a547e4fa327f40ce68692bbc14f12f17c51f17da2a16228f. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/ATDY91900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dbe3690a25733dfb4bca1cb33127d08ae649b40b71f23aa04a1eb5123cfc0f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:04:22Z), 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/ATDY91900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a30f88badd775b2e1226c98fa0d40164266113186d47b68046f7ffa5f439310. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATDY91900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c30eb37da4690a02d2432709890101b3fc10208822e32ad9f209c571e0f88. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:02Z), 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/ATDY91900045.
Unter den Masken (Live at Arena, Wien, November 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e01bb5ec11e36d164f30307086430039b3f0571783aaeeedb3f6b27839acfc4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ATDY92000001.
Der Bua (Live at Arena, Wien, November 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dcdf3474dab9f9eaff4e82d09f3b6a58afef4c92e16f00107d222e621d3e64. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATDY92000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133d7cd5b2b17e6a063e005a3b2683837962928b1d3f9ec66dbb4b768e82c15. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:06Z), 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/ATDY92100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06054d2fdbffbfacfd9d401e98b7629b6053c3df3be24e29f8a8dd08c16d2777. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ATDY92100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771e292183b9f86e04807d323c93f5bbe00f58dad27c6ca66c9acd3d4f3f73d7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ATDY92100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4dd189111e4a2d49bd2c9fbad6ee2565da15b6e9d0d58080d773ba3ca77777. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/ATDY92100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2b50057d21511bc3129c8b2e0dafbf3f57af9b78e19425a67c3541536fefaa. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/ATDY92300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe8aebdc3a366d7ccb33521dbb2f0b8268f162bf982511ca5213c75467fa42. 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/ATDY92300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a91b514c3d320deafa446e2b5f735c4e78e9c6fee911360c475f5bc7c7b4333. 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/ATDY92300031.
An das Gestern, das nie Morgen wurden darfte. Ich warte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6584db1d90b63122b115a18f74db46501de094b8b4f806148c6da2aaaa0079ed. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ATDY92400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02279660708c7000bfeb8788a0953a696d01a392bcbabef91af0660af7325308. 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/ATDY92400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6584db1d90b63122b115a18f74db46501de094b8b4f806148c6da2aaaa0079ed. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATDY92400010.