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 0x41facc2b6a89260bda6bd3b029b66902c5760fc1a418ad9eb5d64c7d1eefb80a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6171ae9-2245-438e-88c4-ccd6da3f93d1.json and https://artists.proofprofile.net/proofs/artist/b6171ae9-2245-438e-88c4-ccd6da3f93d1.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 0xd8d44e7ed35d3f07d0364447ebcf3f9ef5ee0fa0b964f81dcec3d42c2bd23d06. 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/NL4NL2131698.
Freundschaft FC Schalke 04 & 1. FC Nürnberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db8098dc4742cb4950e59faefd19e6355cdeb3084be761b97eb79a3d381b4b8. 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/NL4NL2166972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5edbfeef415c239ea20622a30035162de47516e4a76251390cf59c1ea8067d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:32:53Z), 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/QZNWZ2291304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b12af0393887e89c3bad35befeecb3d33aca37d5dc64a3ab1ac04da80c54389. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:45Z), 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/QZNWX2285908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd20642adbdb6319a35d4cd2a4ec02b8106923c685a1fc0d2a79034d978f2006. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6M2340222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644b7b737d253aecba72f356a57ef7bf549f7051679c3accf04d555f2bc3b928. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:52Z), 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/QZK6J2345689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf64cb3d6ca70196cce9b789724c7bdf3bc2edc098847eddd3173930f1bc85d5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL4NL2207240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25252ba0c6285950a32ca8ddf67c8ed16236f7451bfe64c81b007c9bf5e1472d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:59Z), 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/NL4NL2207242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6934885d8bc3c32e3be0d95c8b076e86ee352830277da50cb2905d51e9d9e97. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES92372834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a1e747d9f14e1610c1cd29931898898f16f8f0e260a4f171d4c9db75a6b33e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA62462708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd296cd8d6d1571697f0cb597184f2ada7409b7283b33d07ffe8b8b5f3395f5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES92466353.