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 0x411f29ba65dfcb2207b9082374be636266b6924896ff92e4b712fbf64ca591e6. 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/8a32cf89-476f-41e0-bdd1-8885d0a64430.json and https://artists.proofprofile.net/proofs/artist/8a32cf89-476f-41e0-bdd1-8885d0a64430.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Geräuschkulisse, Vol. 1 (The Instrumentals)
Geräuschkulisse Vol. 2 (The Instrumentals)
Geräuschkulisse, Vol. 3 (The Instrumentals)
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 0x95c2b6d0f5c6602dace9a6537d0fe979a88eab63a0c91bde06d3f135657f1af1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEUP52100411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912defdb8eb65a55926f531b8d0034b96388d14898e92f05581ab2ed33ba1bcd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEUP52100414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc930b0fa6a6bed9b96c36c07ab2fd7d10bfca543fbfb36fa4997df5a4404cee9. 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/DEUP52100416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26084006ab1000c49761cff77859984a7a50c776097c1048b5473bb20692fadb. 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/DEUP52200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea13fd12474bbae3812e2b10172aca3705f9fc95fad1866b47cfdddc0c9468. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEUP52400882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98396ab5ed9873c275351ec95b18a8427296bd2bea61a00cd67cbac0d1ab5bc. 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/DEUP52400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead8550acdc7171b3eaff3d23396b3e9b214832fb9b0a6269217c29aa9e20eb. 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/DEUP52400883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc8fd410d81c810974ca3aee6ce3744ac5fb8c02c282a0e9a3d1b4f60e0c34. 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/DEUP52400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21ac49e9206f5efe1debbd65073ab8cfee259b625228f6655c3ece1cf0d19b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEUP52400861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55bc87d26fd69a824124c9d878743ae5abe62b170a87e93684abbb69f8001ca. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEUP52400867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a2a0ada1549d5064b6883597bc51e5e63704459c352bb1088035facaa22f8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEUP52400872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc8fd410d81c810974ca3aee6ce3744ac5fb8c02c282a0e9a3d1b4f60e0c34. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEUP52400876.
standing on the shoulder of a green giant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a49bfb140e5201159d194f1223da1028c19833f05dacc2c9d18f8c25d8745f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEUP52400879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea13fd12474bbae3812e2b10172aca3705f9fc95fad1866b47cfdddc0c9468. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEUP52400882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead8550acdc7171b3eaff3d23396b3e9b214832fb9b0a6269217c29aa9e20eb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEUP52400883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f65574caf3c999a1544e82feb128bf73e8c8929d8e57396f8deb437e18b08. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEUP52400868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72fd8aa797df9ef1dbb2d58c9f90c454cf31d7a1e39eab0ac15dc823bbd5b3. 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/DEUP52400869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7345416c9f58e281cdacec4d9d0cc577d6471f67b7d9930270b28bc959e26. 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/DEQ022260325.