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 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 0x4be4535409545d98d6b0aa8dedfcb209f0c9c292586545d364e6f79096d664d2. 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/2350ecae-e0e3-446f-8c32-2f61bdc289d7.json and https://artists.proofprofile.net/proofs/artist/2350ecae-e0e3-446f-8c32-2f61bdc289d7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x555725dbc4cf71a3c486fb496870a401468d7c2dc818d0679eb98784785406f0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110895 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016e7ff66c4aa5914242ae208df707ca086e8d11c5aeecf58b756e324f2f84f8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110896 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bc52452353657865a118263db5a46e53382eb9f205fcb94cc2db95aec64520. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110897 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba859c3aa05837d64b1323009b7a4ad602157384e709836393875e3cc3b0202. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110898 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c8365a6cb2f6817829f6f0f8563c5420e34ce28c00cd67b56157aa755f142. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110899 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341b14e6a57d2364c807ed1444d9fef87e1ce91cc84b554170eac43cd4150b93. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110902 — a six-check JSON result.
Kapitel 1 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcecfd5de9453a32e4ab3cde0b9833a3dadb97dc4f6d946e8fb61ee156360c1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110926 — a six-check JSON result.
Kapitel 2 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a75143f72ad8f7d95d2420a388d85402e1e7417edd3fb6f442f06d51b8c248. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110927 — a six-check JSON result.
Kapitel 3 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa501404e242c0142a1bba4acbc22f90e621d7e71e99b39c2df792b96e20756b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110928 — a six-check JSON result.
Kapitel 4 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f45da7f0cefb2e299da572acbee73f2e345380ad2eea78ecea352d66a602318. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110929 — a six-check JSON result.
Kapitel 5 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c372d8f6d703d975a4ae559419665b1cdb01b45a7da9c7a4e9042a935dd72e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110930 — a six-check JSON result.
Kapitel 6 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e7df22d89f8ff00d85c620ed773a2458341d2945a1f47df16606899fdab890. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110931 — a six-check JSON result.
Kapitel 7 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91e7633487c982a22a8024f90019333040fcc961f3505d60d8ebfee2a42ce6a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110932 — a six-check JSON result.
Kapitel 9 - 01: Der geheimnisvolle Pokal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b4801ad68173c7b95f3257b5fd76e9f467b8e639d4de93ca0d06d3ad3ce162. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110934 — a six-check JSON result.
Kapitel 1 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3954a35840235a0b3c570ea2440db6a5c7a7c62763967d93537d89b521125b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110884 — a six-check JSON result.
Kapitel 2 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f17486fa673663422b86eaa44e3f83c6c2b1f207ad67545731492ff99eb1a6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110885 — a six-check JSON result.
Kapitel 3 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e17ee4e00c81a9cabb8634d0602876878be79f9b63a8474025ebccaec5e7e3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110886 — a six-check JSON result.
Kapitel 4 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f8d8fd392d17c77b7ba887779d2d44ebb238ca8c11ce2053741cce9a63cd9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110887 — a six-check JSON result.
Kapitel 5 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906bac84618873a9651f5db59260b4ac7deb749a4457f9b29cb1527e2f1271fa. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110888 — a six-check JSON result.
Kapitel 7 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a003c4818dc6ab91cd0ae4ee422655f1a69450df12a9250d5d3f9e0ebb7275e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110890 — a six-check JSON result.
Kapitel 10 - 03: Falsches Spiel im Stadion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baed2a828f28363f83efc240995db624abf9d921131f6d6282a777a84ce8a75. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110893 — a six-check JSON result.
2 Eine freudige Überraschung am Zaun - 06: Ein Schuss mit Folgen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef9418c9fa6e6f02f3c2e8853f243898370c4e6a9de9547a1169264f43e776. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110917 — a six-check JSON result.
2 Letztes Training - 07: Eine gefährliche Entdeckung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c19de5a686e97abe73f6029a07008bfe3f8c16337523cd14c7837182488dcd. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91110877 — a six-check JSON result.
1 Das Schulturnier - 08: Der Fußballdieb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc9f86f5ce359e22bead01c67fe2efe666b7a96a01f7cdafe4b665fe687bd5c. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM31555876 — a six-check JSON result.
2 Seltsamer Vorfall beim Turnier - 08: Der Fußballdieb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdace7b6e83cc664403e9264ec7eb070f33035a3f35c96527e8f8f385bff17d76. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM31555877 — a six-check JSON result.
1 Der schlechte Platz - 09: Das Weihnachtsturnier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95cdaa377cbf52a1d62810e0716244fab6ba110c805750edab14ff9d686fd12. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI51067598 — a six-check JSON result.
2 Der schlechte Platz - 09: Das Weihnachtsturnier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf91f96df372522130dfaad717428db0abca1104e1f227d082033cbe354039f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI51067599 — a six-check JSON result.
3 Das erste Training - 09: Das Weihnachtsturnier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a78547119cf804594622a74e23d49e5902244c6780755d77074a349fd0f6d84. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI51067600 — a six-check JSON result.
4 Der Proviant ist weg - 09: Das Weihnachtsturnier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06219b97fae09a8b438577ee95d14e3a3b94144d8f01c307ce1f196b6fe839d3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI51067601 — a six-check JSON result.