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 0x7d000a8a77bffb987091423fafadf71acace9cb8696784b4ad4d9f1e3adc5fae. 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/3f2355ee-9980-4558-8f33-96391e1bab79.json and https://artists.proofprofile.net/proofs/artist/3f2355ee-9980-4558-8f33-96391e1bab79.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 0x81ea204308ea0d189a33da6e272b1910aac57338e1b2893b5e5616b6b45217ce. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:14Z), 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/CZA759706302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8266fd27da659752f9df27329b6b3df7155a9cc6b80ef2fa9755ea7caaa29904. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/CZA759706303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b995911ccd04b3fa46d0abbaf0aed1eb2a8afa8a71111ed9d59d6e7ad807153. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CZA759706304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa528b4d1ae69952c9f868f97e12f7b5b94a30f74d8d585df25a55affc7e60501. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZA759706309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d7eb07b1c9361bcc5cef1261eba059faab76f0f7747d9430abca7df9cccdfb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CZA230100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ad7f3369f63edafd4b388593f691f4602faecf753319f140d303c0980e14d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CZA230100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77bca9858f562f9d32c1e89b9891223763de7bfbddbcdb67acf6cbf21733232. 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/CZA230100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ec16ed54cf0812e0b8580fa44ab73c7de55cecbb918121a704373be8881aa5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CZA230100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b013407dcde1f2948484c999ebf99954ca96d8245949d73e7fd0facb53ff07. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CZA230100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9b875c85fdeb4c2d454c8a88b49d32b5c757732dd7ac578994a8c3a114b92. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZA230100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a6ab6553ba0d630ed3e9e769ebd7bfbc51d79e28f0ba127869bae9930ffd2b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZA230600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce73a4515e6b0a6088f4efc1a9115b43adec4819e9c41766685d6c10197a637. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:26Z), 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/CZA230600157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e18f0437e8a0d89ed934045c2341273418b5a90f5ff848682dc5115454ba2d. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/CZA230600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00ebfc8b555da5e4c87fea652f832d9a3c3aca5fc64bffb8dd98e736389e4b3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:41:00Z), 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/CZA161602625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd657866ae85ebe5caa8db902cc40f18b4b9dd97fe13eb6d45ba0c1a664db0104. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZA161602628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35022ae4412a2a699a5bbd4bd8d59a2626a464f06fe83b64cf5b962a7c9787ec. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:27:28Z), 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/CZA161602631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68360beff8e7bca614004193224f1914bfcf9c338f9fba7dbf0752b026af6c5d. 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/CZA161602633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29574153c523cf8c871d1a13456a2457836ea5c18d6f7db2ced77b7e5e71606d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:22:42Z), 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/CZA759603902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afef2426700a751f0c64ebe6801c52b7536250ff24ea664daf2bf3319320bcc. 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/CZA231200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e75476a2f20f054b23eb1e645478e6ed2d13e75abc93539f2bf8b991f31dc2d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA161103351.
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