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 0x37290a25dfea4ee80348d70dd72bf997b5155873d8c74c5cecd4bae95aad2519. 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/fc6ea3ef-4fc6-4d8c-be69-8832e5d5e4bf.json and https://artists.proofprofile.net/proofs/artist/fc6ea3ef-4fc6-4d8c-be69-8832e5d5e4bf.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 0xb36c0c6211cfbd5fe671f0a29c72743ef2eb3ccac6afc68a61fcb1b1e6299748. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:32:07Z), 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/ATV110913005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde707effe2f5a42848a77cd5f7367b6b2d0ea52d7ca23c178f006ba5ebefc88. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ATV110913009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e61ae6582190656cea8b93b2cf2aee4f930962fb8a26642f13b446ca483137. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ATV111206001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c2e1b40b6236a42118faa69bdea845aa012faf4106e9887595fec0d145b9a3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ATV111206012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bc9c3788d4d5f950f0054f8d41f72bdbd9c8492929f2d7a8bcf01b2feae093. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ATT251509040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4e7232f0dfa5a9c6f303b80665fe2524ebd53d4dce0a08cafe33a8cddc6a1e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:36Z), 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/ATT251414720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817155582d869edef2bbf95338dc7b483b5af8e3bed98e104149b01a7dfd8c5. 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/ATT251509060.
Gott zur Ehr dem Nächsten zur Wehr (Feuerwehrmarsch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683327c4fb742d7b40d33e6794721cc054617ce79735498444f14dde20da462. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:58Z), 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/ATT251509070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a59a160d4b16336272a520298ee80280927931dcf64e6c51a24f7695002b71. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ATT251509100.