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 0x31e841e96b9be1d0a1eef921ced5faba0aec6917899d088d7976eb6fe6ec2239. 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/f0f6e4e8-69fd-4264-b0bb-0786edf5110d.json and https://artists.proofprofile.net/proofs/artist/f0f6e4e8-69fd-4264-b0bb-0786edf5110d.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 0x3aa61eb642569bf8faba8840892361fcbe91a70665502f82b0aad6d716b5d17c. 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/USHM91224665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333de7b583c689b5e709c1ac2dc113bca0703e299f999dbdf6c50fe8d82fd24b. 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/USHM91224668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31c07d771eb963d8b2a09d6b72f9c083fcc4cff8bf1b3b3df5d04b4a8c207c. 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/USHM21381168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe1af6afdffabae9fe028cfb8272e00121b138e7cd3bd08d568f2c0b27844cf. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:23Z), 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/USX9P1402269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eefd2eff4cbe8e90d0dee0ca843d34da7f4286bfe90d273e2eda0a77435fff2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USX9P1402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdec850d66236aca137d63e9e34405a23408e7ea06e108c73fbb63fec57fb6f3. 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/USHM21820582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ddc3e8f49835432d3f35c6bdfe9cd1d56c1563e6a15075e662293d10972ca6. 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/USHM21820584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ef6dd6ce2225c1769614f4818aab725330195458b11584799b5871db41f39. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM21820587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10960942dae3025db65ed894c647230d02f6ab04f08fc0b737019162ef52becb. 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/USHM21820590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa98952e6001d54f5c6d9ac3db0a72441a6dd29205db3fd9ab62a8407b2da79. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAED1921417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c73e3a26bceeeb07317451336ab61f11a282b98330662f4c6168c93fd1ee494. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:34Z), 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/TCAED1921421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af3972060117fbec51fe0a001c6c6e10daa0c1d933a12d2d7623d5d557cdff. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAED1921428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1416acd375b6c8377080ff66898f5317ff3bd4bb0aece9f63f43f4948eaeac70. 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/TCAED1921431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cb792db8ba44fa90fe637263dcf329de002bfadd193c4c6898bb2c5f4e378f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:47Z), 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/TCAED1921433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d524d8a483cccd8f59a3ad97898a64cb520a0df88ba4d180adffb64bc5061. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:48Z), 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/TCAED1921435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2a7223d7c2fb63c2d0c7ffa7177837768dce7e385aea3e80d7a16fd8f855a6. 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/TCAED1921436.