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 0xc848c82dad18fe1029450395392d5cfd4d0832ab37d7d70640abc6120ba6a62c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7974fb7b-f0ca-4769-9eff-953ee4e0f27e.json and https://artists.proofprofile.net/proofs/artist/7974fb7b-f0ca-4769-9eff-953ee4e0f27e.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 0xfc33f6cc0eacd9fc20ca3b848195c81d80a31ddcb43196e9f8a0e82589e9f8e6. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/ESA012101940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c43d46b38e46cf926c6f7e43d5406272c57e898548556ea4892cdd8f3b3c4d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ESA011738659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69102ec4cf3ee86de0cdcf38c90f917bd100aba45c5092da8810bc0e549866f5. 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/ESA011536059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b038bf9545b7e0715c1968c6676f681d489604cef1e8024bfe81dd120a8df9b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:19Z), 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/ESA012256968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd452cf8006b73ab764eb755c9e056a1b791484eb30b08b93b0dbf4c28d1a028a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ESA012278355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f2382795e523211d29ba933cfd5f4e0cc841f516358e538fc83e36c59ac872. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ESA012278363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc27cdf46f198497f8932bfa2bfbb1c72412483ee3adb91266a8fa85c06ce05. 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/QZTB72283289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a583fdc23ba6f29aee91e91cb3b591be68619ba142d7ef66166a8abf49def0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:23:42Z), 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/QZFZ42345428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db35d9e9ed334dbc369e534c33629916e298c0876ccf77c5352727a0a005f78. 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/QZHNB2336835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d142f25fb34ab2b927505d5a8857bccd1d99bb020fabdd122c889b5406b4e6d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:51Z), 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/QZNWU2480895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd867c7f0aae24c9feb3f2e586942cc9d0dc7db59d1c5da0f8c254f60c0e87c35. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWY2411580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0692a5e2b40cf23b0c655037b2786b5c3fe543a8e896d18269881a5990e192. 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/QZNWZ2478512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc6f92e45a91339f66ce9bde62c7c70a63680bbb36ee07d54ec525151cdbcc8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:56Z), 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/QZWFG2452270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13b0eff5d85a297474b95364c4301e55fb5bf835a756378547fdb36007abfeb. 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/QZWFG2452271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c673107191fa24a4f032c0e76ffe7154398f6bb650344f375706529be06c455. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFG2452272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcddc2c00a57bdcbbaf3d35a4d073a1749d30c4b6c1383f4ecc2a3dff00b028. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFG2452273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f69dd7c92781d1f1d25f7660f76f02ea659bbc1b07c0ae0a129e4c9180543. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZWFG2452274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8afe3f5a1c47035eb1bab43878c1a2806c88f4c944c4151c64083b24a77c27. 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/QZWFG2452275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde14f0d46cad50013546c63955f72a292e50135346ed83bb83979db71a4c6a6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFG2452276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced8cc927d7fb7ce16bcac962d78afafa0586e78f421139cf77c8b8f51e5eef. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFG2452277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea2e27d64bd75af0246470b7317e21b84d773a469c84f22c997873ef4f142d1. 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/QZWFG2452278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf9bee16807e14f3ed5f5c2f23ec9ac9e612398ed66e10443d653d4de8f9ff. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTAZ2579578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10214d796a745f6f2bc23a883d9d678c92742dc3ccaef511a9c433512052c2e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTAZ2579579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3df09001ee32c9f1f96ef4ea1851ca56e6913fd258c9605f9f89e7ae127713. 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/QZTAZ2579580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f888d8c7619e9a3f1a0d451640143fba34c89c25e4c4874d1a332d4140e30eb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:51Z), 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/QZTAZ2579581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb323ee73a10534ba5e3cbbba3bd3979d674f7ac192a97055aa4517d3e3a624. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAZ2579582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b50dfddf9cfea1e8e18f8d139a6e85d161c7528179519b2b6e065eb154c995. 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/QZTAZ2579583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215fc126f4529243b24126728cae0529f3b63893111a3d2942733e4a9d24318b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAZ2579584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc107a91b106da5996fb3106c216df88f381caaf1787a1438d68681b918865868. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAZ2579585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf674c2ff17c845d03b38d6fbcdb146510785ffde220c95533dc06a5ec1343ccd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:16Z), 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/QZTAZ2579586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2652af14d9ccfffa861624a99aa078a536e85d55b15c91949ae448fd33438. 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/QZWFR2575282.