Wahlstedt (; ) is a town in the district of Segeberg in Schleswig-Holstein, Germany. Geography The town lies about 50 km north of Hamburg, 40 km south of Kiel and 30 km west of Lübeck. It is about s
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 0xba4335f6a10f43b160523242bdbfe1c0ab552abe4ffe4180f4006a5bb8940d88. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa1b0d9c-6c65-4bd0-b14f-ae57ba360788.json and https://artists.proofprofile.net/proofs/artist/fa1b0d9c-6c65-4bd0-b14f-ae57ba360788.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 0x4e99a4839fd3dd1e7cc4d435d0f11e1951251442b3d21c98f1a0d61c44452a96. 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/QZES72376018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a61e073797683c4ebd4c3144f216dddce845d42eb07c914f26f4f0bfceb056. 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/QZWFE2379005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac06be373b47db3852eebc04cbdf75a017c98669e8eee74290ef2410efa4e063. 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/NLXV51300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57045f7b0f8ee973d322715a78dfa8722e34dba48d88234aabf0dd877f311a9. 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/QZRP52122357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf34eacd2999a9bafbfa1e14a915d21aafa7c06421ff1924c7a8be879fe13405. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZK6F2099184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2177f7e2963e7e83a867e12fa89b53ccadc484b0e4fee6aaae46868cb89b456f. 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/QZNWU2277122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be8f3f891dfe087ab045b3ce814f5dfd5b6834140027e056c929d91a18ff105. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:30Z), 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/QZFYX2250858.
Waiting for Life - Arem Ozguc & Arman Aydin Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c9d5f72b3cbd41728869e67208ed0887bcace38afc44692e8765090fd350ce. 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/QM6N22217539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb05cded2d73a96d8c6f8d5856871925529173acc73db5c6ea3a5a05d3b44915. 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/QM4TX2215061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86c81283e8b65c310ff9d3059836e674cb367d3e110aca58c2080e789cf610. 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/QZDA42210305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896322cd6fcc02aaa8c21e02d0f0c3e69b6580cd10bccacccb561dc1d7a63848. 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/QZK6P2433320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c2d18404ec44722d19c8f0627e3cde90b5d53869d3d26518b5e0aed117c022. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLXV51300618.
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 0x5d63c14f07c48171b7d9ab434845fd5110d155174397fd1e29723edf3314258b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6N22217543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdff4f3931cd8182a0fe0333ad1458836ff2751fcf528bb67973216166eee18. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWS2171516.