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 0x4fa4da8cceb073219930bcaaf6f231ba06f686cd5c0ddb9a81117efe65952ec3. 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/76dbb14a-375d-402f-bc64-7e097ada2de7.json and https://artists.proofprofile.net/proofs/artist/76dbb14a-375d-402f-bc64-7e097ada2de7.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 0x75cc81e21a986594f7c3b32333c63ffcea3ec0a0d2ad0249ca0fdc7a95a53ae7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBCFV0300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb26a9d1dfc75d9cfb966f110cf8a1c49bc8c229119894c0ac380d3b19f5cac2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBCFV0300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb367801f103afc870af29671022f470575ebc8b27cd4012df9ede82700194da4. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/GBCFV0300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7699c3ad6fa569e92898038cf75a08ac792e7fcf3aef73258094064ccb7fd0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBCFV0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9ab4454b963130a72b71da710f112c7875fd12a4a81ea339e079d2ae78962. 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/GBCFV0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f087eb1bf87575d6716f8664422bba86bb7903f682d196ae3a0b2895953a123. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBCFV0600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139b74f7c7e03b61c8b197d35401cc976ce508135dff9c7d084712afe49322df. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBCFV0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9f04ef8f1f8d493e78e2cac36701fa329f162ef4e4f7508f44fc9b55848127. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBCFV0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da31aec0c3a60a5381de2a933ce3ed91a560a9e3d14a359d76ff9a061fe465. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBCFV0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec89a8cdb021ff791a65ea7d9c71ed320944de0a19c1db536ac2f61d7b7e5a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBCFV0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7c2272839c084a4e680b978a11c9951c7ded1dd329d14257913aa271cac482. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBCFV0800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4473b53ad4fa542923f4402457583ae0ca2832a2bd21f1906e2afccce3d2d29. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/GBCFV0800016.
Funk n' Beats, Vol. 3 (Mixed by Featurecast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3656e1c15ba08def30fd5042541fb6b7be7470f78cecd92fbf4ee550e5aa755. 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/GBRGV1750517.