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 0x53085f64a5ba516271cd8dbc3750ccb36f4b07740ad52d0a18e82ab3841f0f90. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07bfdd0b-cb7c-47e9-90e7-afba40ce85d9.json and https://artists.proofprofile.net/proofs/artist/07bfdd0b-cb7c-47e9-90e7-afba40ce85d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schwarzer Peter - Rockoper in zwei Akten (Remastered 2023)
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 0xe59acf246104b9d72610fc2edde7be0e4fbcde23ca8117737fa6c83edcacb46b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R1857917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f216cfc83fb53351fb72c3c52fb2bbe526c61717071751084cad7868712f41. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1857918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6811a5d79b2964ea034488774c69249107ddab64330b8ef2616c834cef2ad94d. 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/FR59R1857919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69310912f22370516b009766e0ba79f16682e2f3d7880ed4bf102fedf965cf67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1857920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfc6b00cfdd90435a37cd63ee5db68ce933265f7bacf93d442034f75e9495e2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1857921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf1123dbf753f8c4ebb644dfc0a80a1ac747bfd55735a7e141b4d22a57018b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1857922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b21134aeed3ee47999b8ae2ad4b5ceddae297b6262fc0254d723208cc8813. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1857923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc7b5758a9e796ef9139e6895117505eea1822bfa8ab2c517bf2c44dccdb130. 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/DEVX52000029.