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 0x2c0998322ecbd10d8b270ee3951fc4c479d0bbeccb4bbbc3ee740c06ffc4b98c. 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/d973dff9-1e59-4b6a-abdf-b00e058e10ef.json and https://artists.proofprofile.net/proofs/artist/d973dff9-1e59-4b6a-abdf-b00e058e10ef.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 0xa030477fd4d19a053478e5c3fc1263ce183ce9b542f212ea6cc1cd95700634b5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:59Z), 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/QZFYZ2241464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a4e091d1fd455a0b35b7838d54b6563744a5a6c053c56ed0b7dcdce4b005eb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:39:35Z), 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/QZDA52227056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e7002dcea7d438a5f3dc0bba3607e64c4e4338a93ab312fa510dacef28efd1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWQ2241851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367eff28d39f3b4afa247dffb51555919f0caa0202cb5e290525f40206f24606. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZHN52283702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f63988042a452f2e090e00e1a1610ea3fa70169b2d57dc0f929499fa3bb6e. 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/QZHN72228375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d18afa9abefd72ed6a2c24c7063e6bdb12effe7a9d16ec339f307c53713ab4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:51Z), 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/QZTB52242256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee068ade70883dd97addc098792b37f9885dfcf40c7fe2597c73ffe9401a8e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZES72354802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26322b83c043e8a89f1a0b8f5d2052dcae636d1befb17c32a54d2101590bb6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6J2362587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7352404735cd80628dad4935bba6cdb5a42752834e5b6e9f1ab0b7d4de9bac78. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB92304124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca62edf7fdc47aa0bae42fb72dc789be131dc371a7809682aa5f8983e1ed6d0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:24:03Z), 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/TCAIM2468810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c474a11ae7dfdf9d5123ae78dc0154f020aa1dbfcaf7dde8e88450b268ddff. 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/TCAIS2482873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053c72aa9284799bc7a242dc0d6dac17cc00f122bfccd54b681452e2d2a3b90. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:53Z), 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/TCAJA2478734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae86569da60dd5ae291d3632d5ac0227eba2a15dadccf66f611161a29e540f5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:45Z), 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/QZZ7V2434219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9305d13e75f3a60dbb621e5d7802d4323226051bd6a626664016709f0542c04. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:22:23Z), 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/TCAJI2557012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc912280817519014adcc4e2b869b87a56884bf0fb4fca5572712bd8ff84768f7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNWV2515461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196bde17ac3b8d660d88641bc8a8ff871b3db3752dc02d00366ad1776eee66d0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJZ2533251.