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 0x25f0df32ab80c671933e429aab469fafc185f7fae59cba517298d908ece0d803. 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/f906b15b-90e8-48c7-9c43-bcd4b9184d46.json and https://artists.proofprofile.net/proofs/artist/f906b15b-90e8-48c7-9c43-bcd4b9184d46.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 0x1e04abf7fede772daef11cf9616a2985cdba9173a0ea1e39fa7d1af72b587566. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/GX38U2229350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f846ae1945cf404485b8ffdd70507cc9fedd6af89098602ef97851436239a2. 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/GX38U2229292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f141530e77da38c1f781b4cd787948ca9a684b5a5039da7ac3148c5b7ef116. 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/QZK6L2285132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70efbe1140c723d1225756ebfeb0ded6b4cac4c283e8b09ccc405019f15fb3e7. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FRX872286071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d93de098142364cf7ec0170ab37508c08dfed2c3b05b44b491748e663d7882. 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/DGA052210766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c590bc7f3c330264fd81053ea1c4c533432961b013b014f7205f64abd6f64. 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/QZTAW2214825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848bfa27b35c4f37e186d777ed43c720ee6836370fad4044dedc84db0cbf2f95. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTAZ2212439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45011037aa6b020b9085f12ae312a5058e4149d958f2818d907ee04a9170a0d6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR10S2380485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c550955150c27f584cbbbb8f29c10719d91f6ddab9edcdf891ea6fb9eaeba. 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/FRX202339912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d375b265f1c6b5640687022ca15948e43c77e1bd9f32412f573c800b891d080. 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/FRX202339909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a9bec7aa1eb4f790f61116601500ddbb1032b3ae010c1630e3ec2bfc25d5c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542331552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8a05c9b159f4adb31caaf70dce781a7152468302275211022783b7b0dd1ba1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMZ92365844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a9cc858e099531c51a37287f1180b1af66f05beaaf46276038d6c62b90b0ac. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DGA062385915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f3e902a11726399d4d14a7e705b21fff5eb949f5420da51cbe3540e59bf3eb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA062385919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2127241f560de0f1bcddd284901c3f94f8c2d5092ed122b577d0f64ee7a69af. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DGA0Q2386558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba95f309df8edf6d02f01632f4a8a2eda5cbbc94ddec2c79e06215f190e64c3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NEKSW2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e4ff1b0319b17fb24dec63a487cb08ee41210bb0ff9dac42b67e38784c0b3d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NEKSW2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5612fd936ee540fe953b924c7f3781001782f42b2798d37119f98d7db347ef8a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0L2453704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b61974c213846460bce4acf4c0afd4595bef0dcf5eafc252925ebd7e472435. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0R2458991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3534d724a480c9ab45ee991a02aa3f32b20cc69afa574aae0642941d6e6dd1b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR9W12464754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a532f21785733a12a78990e9a8f9946506dd6e19331987269d86bc34afa90. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR9W12464756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa29f328b6d5e8c42fe171d6551c278b4ac13f83487002e750902b6910154f6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7U2456971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5586954cf3100a699dc239dc63986fddd8a7794bba591b0ba0cadc5d39934600. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12464755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a532f21785733a12a78990e9a8f9946506dd6e19331987269d86bc34afa90. 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/FR9W12464756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab693fa968505804b0df54b4334cad6eedf3f5f672aa0477e4829e0d84d4149. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12464757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d31fa09621e1fc0e7881537790c091ab3bc80aeaa73126dd097c87f4d6c6e87. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR9W12464759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24bd06576c1812262bbc529f9eff761361ca4b9387ad060e4cf9ba537f7f57. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12464760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08930c8f32c174c2cbb6fb31cee361f5ca7a367470373a4d1b6f026940c9ecd2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR10S2542822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a532f21785733a12a78990e9a8f9946506dd6e19331987269d86bc34afa90. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR9W12464756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab693fa968505804b0df54b4334cad6eedf3f5f672aa0477e4829e0d84d4149. 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/FR9W12464757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa29f328b6d5e8c42fe171d6551c278b4ac13f83487002e750902b6910154f6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ7U2456971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d31fa09621e1fc0e7881537790c091ab3bc80aeaa73126dd097c87f4d6c6e87. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FR9W12464759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24bd06576c1812262bbc529f9eff761361ca4b9387ad060e4cf9ba537f7f57. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/FR9W12464760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4ffff41392550e67da3e6cf5a2b962bac5b0df8469f66edf22c69f01fa800. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR9W12464761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9743f4d734c7228b7bdf1db604aa3e99ada2cfc9cd90ac83056b167cb5654e5. 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/CIA3G2400077.