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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3446e1e6233974882d2867a63a001874ee136da3d9fe8082d84b7213231b40. 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/bda67b33-1b70-4537-b7f5-801ee5555aad.json and https://artists.proofprofile.net/proofs/artist/bda67b33-1b70-4537-b7f5-801ee5555aad.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9085a8a37ef8fc6279f45ba9729ad6a7b14ef277128f8a717c1e67fdf8ec213f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZC62410392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde737c41dc3f175df2b79a4884d98b0b905a754651543cc627622a10f9764075. 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/DEBN21000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deab0e762c28e0212264df0bb3128ed84cb60920c19bcbb1378fa911b768216. 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/DEZC62495887.
Bagger (feat. Sizzlac, Caput & Moe Mitchell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1685590c328eef5cdfdaea0514c8552d5cdae8949b7900fb3c0a84efe74b2461. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ120807426.
Weil's nicht anders geht (feat. Franky Kubrick, Caput & Sizzlac)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee52b88577d1bba2de0cf896419d8b6fe1174f93318d37ac6d3b01012fc212f. 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/DEQ120807430.
Feuer (feat. Ercandize, Amar, Caput & MottaMan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b5301d02a1fdc156367fdcd53007f7e8d05e828ab122aad4a9b8bf9890ba6. 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/DEQ120807433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00283447e7dcce20bc96251d6d3977e64885cbe2b74c05065d1faf9e3c475a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ120807436.
Ausser Kontrolle (feat. Kaas, Franky Kubrick, Caput, Olli Banjo & Dervizz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b241769b65bcd2a58a380a91ead5f0a045564bd4c9e45365aed6030691968d. 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/DEQ120807444.
Das ist OR! (feat. Ercandize, Amar Azul, Moe Mitchell & Caput)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df815997f412ae1fa5304acb168ec5e8e5fd6654a2925778858d38500fe68b9. 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/DEA810601169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a94070294685181937e41df4df957e7e220198ac9df2825f1102aabf2fb053a. 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/DEA810601160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7573a0c565f6a8e6f6a19a9ab0b187ddec13ed0ffa3ace3b40616041830ba95. 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/DEA810601174.
Nie mehr hoch (feat. Caput & Moe Mitchell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41507ee07bacb8362b59f3646f2cbda2b8c8f5376a56a7888e0e3fb66a6adc03. 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/DEA810601175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5319769d083243aec7417dbd7632cedf8f420ad452509f7dbf6576f08aad63. 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/DEQ120405689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a9471af70cfd7f43541b675c6ffab22cc64d9419335eb03323f99d140cd2f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ120405695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6faf6b10a3b2a7566f98ba7fe678bf6fee9d430cc04e3811b94bbfaa480c995. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/DEA810601957.
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 0x5ed2c2f65ea0a31c304e29b4b32a0a84f3cbba9e150953013b48f3928c5492fe. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEQ121640840.