Die Fantastischen Vier (, "The Fantastic Four"), often shortened to Fanta 4, is a German hip hop band from Stuttgart. The members are Michael Schmidt (Smudo), Andreas Rieke, Thomas Dürr, and Michi Bec
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 0x6a10bfc3a17b4771319d96c32ba2654e4155c44be841af3c5b844a9d148ce839. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68b0623f-087f-4689-bf1f-e2f9eb5d7f26.json and https://artists.proofprofile.net/proofs/artist/68b0623f-087f-4689-bf1f-e2f9eb5d7f26.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 0xcd6b1163796a67e84d90c4c3aa3fd11579fa07f53743d323a96a83e019a2b6e4. 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/DEE869500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960b981b28ff66c895cb68f7147303879881dda340485738fbeca6f7bee7691f. 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/DEE860400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff9957cab683c7e2dcb066937e36cfbeee6df1538bd84077aa0518561e9e5e7. 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/DEE869200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ec0ccec879e0f488ae430089febce48d1a3e537dec90f4838046ec3a86fad. 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/DEE869900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b4d9352a45fc8badd20c9c74aeaca03410b20987ed5ca6e74ab4ab15accf71. 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/DEUM71400147.
Mit freundlichen Grüßen - Boogieman Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc5f7a24853fe8a0a0a35ff382d8835ed5870a9857edfdcbde2b56e33719be. 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/DEZR22300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9198e3a471fc051a0ffc1c763e211e99eafd7ce0f451be95c065ba30eebe3bac. 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/DEZR22300084.
Hip Hop made in Germany - Hits & Klassiker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b4d9352a45fc8badd20c9c74aeaca03410b20987ed5ca6e74ab4ab15accf71. 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/DEUM71400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb1ec360dafab8f1f2fd74adf0af1488e5dd1bfde666ce226cb95ad194fd675. 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/DEE860700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3365496b65fa26ddca3b1e03a3bb4041c436f5395b4e12a87b3e8d6299271746. 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/DEE860700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33974751ea802866726e8618fb1490fd3dbecdbc36f3da8cf5cdce87006536ee. 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/DEE860700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567f075bab32f4a916394467d304ca84958b1df4e2bc09657e8e3c6a6a42bf4e. 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/DEE860700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883772f5c12725299c903a0eee96f6b443f3af332fc6bb7173572dbde112d02a. 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/DEE860700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2720ed0eb61ff93a9907d425926516fe7a13ce2a2823dd67610e4d8dba823. 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/DEE860700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf455317217f323b7e9c426631ae139ac9c9087df572233a50ce64c1570184. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEZR22300083.
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 0x1992028a3db6add4b4f6b14a2c33bcf90963b95009ebc6b1830df4d7545656b8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEZR22300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f99e9079a7ec80746e50e2d61da1542d33d179f15ee3d2aadeb7d82861cf43. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEZR22300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f11490b7cb2b0a0eac7f5893ea0892b015affb1833e4fe1444dabfa10d869. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEZR22300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2574427cd5bbc0a4c882b0b6c31be719b57ab8eecde99d51ad6114ca025d4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEZR22300089.