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 0x257fb3c85ca57c5d59b37a165c38df076e244a59bc53a76513afbfbcbfc3415c. 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/3b3d30d7-339f-4314-9bec-2ee105b74ea4.json and https://artists.proofprofile.net/proofs/artist/3b3d30d7-339f-4314-9bec-2ee105b74ea4.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 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 0xb9ffad9d8c430bdf60468333bb8bbaa2f0684b0328c94e271b762bc27037c057. 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/DEBL61600671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd742dd7e42470a50548dca6a7d2b0885590c960b533f9601a5d03e7f7fb5efbb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEBL61600636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f964d32a22c39b5f32435bcea4bae542a0aaee092d4379013773cc0527ccc. 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/CH7812416557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc007f4fb213a8e0786504363d02dc709c083c4dddc46a7c47961d5acb8160e8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ321500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a44668f11522c870a5ee6618daa9d2879bec840b277a8bb9d4b66dc972e5500. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEBL60688953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9fcd4934b61347c6433e10c9df505f68757e04b4ddb4529ee3c74068d850f3. 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/DEVY82000857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a869125aaf8778305a57de3f7a0fbaa16ea29569544cbfc807cd3416f7028b9. 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/DEBL60568982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f087e9f9c90bf9a31271aae3affbed6821f33795ec1a8ce1c2b46f78360822. 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/DEZ900601596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f85fa746873ddd361b23cb6bf1af3307dd81afc1c67c0e68a7bdf5448ded97. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEBL60693680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80b5d467384824baa44e66cb7269308ad80e45ec46f59238af9d2a939d94ded. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/FR59R1702962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1ea8ca7e386c5c88a303d8285c207af87ab44d5f6f1e8b6606bf45f8193670. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEBL61258077.
Ein Gauner kommt selten allein 2 (Deluxe Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9958acee884abd2264f5c50cf58c1a6303ff56fa7635f51962d7dc2ad9190854. 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/DEPU31404006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9958acee884abd2264f5c50cf58c1a6303ff56fa7635f51962d7dc2ad9190854. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPU31404006.
Blut tauscht man nicht ein (feat. Nizi & Skinny Al)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ad6ef9d83ef8e5dcabe2175baa8344d703e863f25f587829fef1172080ee4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DELV41800206.
Brot stapeln (feat. Fatal, Rico & Skinny Al)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2c173e29dbde25d4423c111dd6df51536088f92ddbf1bddf8dac9ebc875b2f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ321600079.
Nur noch eine Kugel (feat. Skinny Al & Skepsis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c08c1e08259e218093b58dd33501738efd2d0d5b32d17035b43acd03d755dee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ321600107.
Bitte weine nicht um mich (feat. Skinny AL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5df0ae1f6ef7d25f16126e03ecfb3b781bada9c8b2c693ceb122255b430aa6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DELV41700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba66528cf8254b3ab8e87ba4912f149a21bf15c5320b8336a30a37b0109548. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEBL60650337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc636eb852452507312d59ba35d2f18095651e729262618c3dd12a6ff082ba8a0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEBL61227297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9dee5aad3410ab60f23c7b196b1a1e3b9ff747b2a0c966bda74d49108647a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEBL61227314.