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 0x55bf7efebab3b19c593b6a30700aa27a438d69ccb35a53198da10262dbe215f2. 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/3dca1e6c-c347-49f2-ab45-ca6a52ac02b2.json and https://artists.proofprofile.net/proofs/artist/3dca1e6c-c347-49f2-ab45-ca6a52ac02b2.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 0x8ad222e8842658846e5947055f89958dc8828a9db3b4b853cb443c38e87e3da1. 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/DEQ022291965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6daa56fa42189d70937cc59f608695bac35bdfeb5874d5240b2821d6a8b13. 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/DEQ022291966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd15524b4eea98f381ed2f658ff0f4a0215fa076c9ad87fab1a0152ffe11f8a1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEQ022291971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5454cba6be621f7b0e656b4ce31fadd762fac0ff00877b8083a1539dc2fe5a8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWZ2101309.
2 Gramm gegen den Stress (Remix Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44999c5735ff3ebb6f57213ee94b20d55410aee7ccd83f3534c63db4816f2ed5. 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/DGA0Q2394530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ab062894d9a89ae6994aeb7a3731850ab86546769f4ed85c0564922f528e9. 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/DGA0Q2394534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733382e268dde7da457f28bda33cb57208060871ac82516acf1944e5ed46d7a0. 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/DEQZ31700521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70200b63b2b1f0b03c24c8f813df136de8063b34874dfc91996bf16bff5e9b3c. 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/DEQZ31700522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e014bc6a3e33cd912dbbc474e7411ed273efa61d62e1dfe9646bf8812d7f2f7. 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/DEQZ31700523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc65f7b5f3e59aef185aa6fe55cb0776aaf52971bbe39c56755b6fa5feb5c0fe. 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/DEQZ31700524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f05e669a8811317d6b0063daf36d217c6c45153e4574c8318d8e966f0cbb1. 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/DEQZ31700525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae287ba77307b0c7a405082199ff57a9ddd61ae6a7430f7b99d86d08e578f174. 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/DEQZ31700526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bbb8d812eb60af3ded2438e48066972a8fa9824cfd1ad420bc714b769d44bf. 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/DEQZ31700527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1babb6438501db7292bc2170ee3e740696c9c8ff724c00bced88b9ac3f5c8cec. 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/DEQZ31700528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4e2b978224b24a83cc6298e2f7e1bb2c53615d172a5e50cdf2b7bf662b0eaf. 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/DEQZ31700529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2beba9ac639100efd0d1329e9e5e216ce8619effd3695faa0cd9c1b2eb1fde. 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/DEQZ31700530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eded77059a1e6c7f7ac69153bb5c8e0f85f6d6c40f44b47fd797140a5da6bca. 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/DEQZ31700531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be1601294479b9dd7b7df7123fa16602e9a63c6e05fa47366ee174de781d803. 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/DEQZ31700532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0379752c09290f8d1a7faa75c2c3012363e805f1c3fb169c70b0f5a747c95391. 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/DEQZ31700533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdad46569fd839e470322667428b923c80e7de0b54ae60415c67f0e68a9c804. 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/DEQZ31700534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1559308112d52286ff98acb7ba018ee166d17adb39a22eae5caeb0e1cd5105. 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/DEQZ31700535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb55cb2f32ca917c1f6d9828ad46fd8e0baf185b5e86d31d21be6bf4c7046b68. 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/DEQ022001218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28742d820d42e87e85274267fa85cd3a67dfe48ec6f576b8e5f9b1241df8744d. 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/DEZC62383987.