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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4307b0f1211c1532fda49a45c050b3651c49c5b0b3bd5bbd9966d50af42df505. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/554747d7-badb-4f73-b11c-d63d247db824.json and https://artists.proofprofile.net/proofs/artist/554747d7-badb-4f73-b11c-d63d247db824.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4dfc22a2a2c2fa9c1ba71054d489d70ab34a1b208b1128e73943a5f345d11. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLB41600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd7e05433bc12ede90b255070a05891b557cf8b5b7cdbe0ecdc7a99fa8f8116. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USLB41600006.
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 0x119a6d53ba293cdfe0c88c1657b7eecb215c316b10e0a564f2d6946b77fa11bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLB41100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d8c92cb8009d1fed6c957ca3d8b7bf9f57f69882d38fd8d3c408a36de71d1. 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/USLB41100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e97aed1d6c2fe5ca99edd8522e61609cdbf3230d6d0e3d0bca0fc581775f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLB41100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b33b7fc5ba527e1367afe10d56730e9e7b57d566c55606f3de8544b74a762. 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/USLB41100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3286e47c05a7591c19a4fb5f560d6ab52e0befa8c721fab5e30ed0a855b5ca8. 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/USLB41100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0204d234d9b6b16c2d7aba1269b2413993adec323366c35447eca96af5a1c19e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USLB41100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b045626460b543bfa8083508e0a83724819046c93ab26bab35f569c278b891. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USLB41100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264d0e6d7bd1da84662ddce8bfd0a82b5e56faad768cd7baa678f4ab0ac39d99. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLB40700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4b0849ea3fef46ece12e0257fc4fadda9f638064e680a7c71c23898213cf5a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USLB40700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b150bed3d299aa490f4c0fc3022325326c3e77e94ab9315331f073eb962ac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLB40700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8a754121710769848e5ca328e35d1f1ab31ee85ba6c29777c5de8f92440b2a. 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/USLB40700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9726050bd31b564fc0d7cf6ec654d5d9b007cfe21f74231cfee481bc18c379. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USLB40700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35b73c8fb93321a625abd2fbd1393aa0824cb67a34e86a5439496d315489137. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USLB40700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50563cc6d8f20c3a1eb90d949aece2c7b009cddcd0d349987bb6d70042597069. 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/USHM92020162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d9d16314f6591165cc592922ef2ea7c10ebc6bf62991a0f3be5c3d0712040. 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/USHM81851878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9504675118cff0b8028aaa57bbc3a79f7a396312507ad41e788ae4ab5510487b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM81851880.