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 0x0f6f399eb9ddeace2580aca4650af839c6a9fb971e7608b72ceb1336b47c3187. 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/58eec671-b3c1-4190-81bf-dc99611cc031.json and https://artists.proofprofile.net/proofs/artist/58eec671-b3c1-4190-81bf-dc99611cc031.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 0x0b8e9b06a7a8822acffeb4453f8984c9665bef5ef88ec0ab3f1ac0eefd2aefa1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ2304659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807bb28228d7dd486f424f7dc688a4855c9b4c132d1d44dad84d0d7400c3a9be. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAGY2386368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e05deef53b583bfcf42433b7482101a3731a2cf372ad93fdb0c9ceadd1cea6d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USCGH2388032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc223e1a53bf62f0fd672bab85e00c6fce1c8b132137b344cf9af280bb83aa6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGJ2381536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ac0ed89324c6e081cbb3d3d527e1c89ac1553495baf9d6d8a9a2a10a6d4df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USCGH2349205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2303177dcd44f021898092eb04a7453460910189b3611fe8dfd379238a89db78. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGY2380884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2747ad952084da4ea4e154080e353f32fbad6fb9c605051db1d5213f318deb17. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGZ2346077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d107edba21e730d8cf76f64f4b54bba9b7399a6763bf8c07645078739d9b4d4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCAGZ2369210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20caa365e5c17a12a4dd2b16f52dd392b90b1992b1f99d81b214d99acec67b4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAHA2305747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2f213d6a38d5eee0e134748f049e7af7c78fefda057bd9ab579f2f70385741. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHC2337929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a01d390e6787aad30345571ef1e93b424eb8d29181ef48fd718342425d158. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHR2365546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf7c66b828a43581a6a4403625d28c9c3ecd42661d095475ae7453d8d2ad66. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAHU2486842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380ee07570bad18a53266cc22abedf8810e16da2faab487e9a164e97ad5774ae. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAIR2420275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f8ab51058e142e529992421920c3fae2623abdd35125b6d3c10a6126935f02. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIX2460616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1f619c7be7452cc00e77aafcc9d81fd3ce8187c34d03cfb0cea58084197670. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIX2460625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db671a807ce5fdd125648e117d11bff857c8b6937bea7fb76ad685341bfec07. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAIX2460721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abf301a7fa0ca62131ba8bb70f77308c115f328dd9da9f7c420bf7167956802. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT65W2524856.