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 0x9ba4c8909dc3109b22b68bc086646506d0462a91710211e90ea88d73f8b3826a. 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/e9af175a-1cbe-4b92-914c-1e58c474249b.json and https://artists.proofprofile.net/proofs/artist/e9af175a-1cbe-4b92-914c-1e58c474249b.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 0x4af1c5309b103fdb51fae4308d72c4d115bdb2f9e6e7910a51fa9de58c7b174f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62450949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278cebcd8bb5fb4814b54f03889225121e4bfe77b1fef86f8071bc3204ff6a21. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62476795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69934dd20fa1ddbff34b10abb81c9501b67c51496de697c206312fa4a594a620. 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/QZFZ72484725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b7d0c8690b7e12b09661844dbdab114a71de218de3d233574dd93f6a596143. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6L2439493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bb36d3d197aa2a2d29297d882cc9788e7a9ec18353256082a215e167ecebeb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2428415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb453e32ce24e62dbbf7c7e5d8528ba3b0adb89e4b2b0ea11de504bf5536c6793. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPLS2478463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a12a6f760fe6d652be92b36fa6ec5dbb9f4947d8efcff1b70dd222b1a5ae4. 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/QZTBA2425287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f92f10e908cd1a53b121c4fa0ef33780aec81704bfd8329f2d695552ef7c726. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZWFE2481598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92486afd1c1f178757e4c81d2aa81b206eb4026cfd5f117230fd38972ebd6b67. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFG2444967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed5ac5922aa88b05879d105c7fa18222db7de0cb4fb39d45f040cb14ad86d0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFK2431450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af73af4a44f6000095bfdf16b35f6fd1bb82aeb56d458d7795c940266b94d00. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZWFU2436953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630cdacb9765d6a35eccce69da2e858b37a66148167dab1f32790d869a2aa41b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZWFV2456833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d3c83b03592edb41120923d69f55c2cd13d7e02e739c6f25625168b72a7c3. 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/QZZ7T2462175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4065f0dc6db1873ee8140314774248d84359c41f098ca2f8e1e90b1e34ad47. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QT3EZ2462232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305defc8c0da8df4d01db15fcc997f184c11c15592cd29aeb67139dbe5e1beb9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFYX2509588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb7b320cb4987e549e9417f714bfcd2fb25622095087fc08379a18b311a4fe0. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZES92533039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f47e824a8fa5947c2ae7370a8af34530a3f57da345120cb05423c98f1852f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHN52532016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a8481a73489268b62ef1f6b18531ed42d9eb980818362a823a3790f83713d4. 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/QZHN82597563.