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 0x40183df1313d68271e421023258fddc6e4ed5b073f0281cdd46c10f72e23f5de. 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/973bff6b-c438-4561-9409-abbdef80a10d.json and https://artists.proofprofile.net/proofs/artist/973bff6b-c438-4561-9409-abbdef80a10d.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 0x4a8eeeca1a2a5ded50d574a2c726cee7d850122ba945215c8f16af7af30f4c18. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:10Z), 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/GX8LD2421701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f297be109a74c4237dc7d72e44a533a595304c29f668f86aa73888f12d85b9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:27:35Z), 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/GX8LD2492170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54da3da0306c786ce0e9108f0faad2a9b6e166e35798cfa8d82b7042d100c48. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX5MX2468454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac702730f40ef366bd242f76eaa787edf0eaca838bbc962fe28c9c35123bb90. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX5MX2447583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c19a8a4f1405745bb819afebbbc13bf584f33fd2412d7efbc367cb3f2a266e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GX5MX2466682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771e636e964cbefea4f3526481a321179d8f4103f30220f2524e7fb798aba228. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:23:30Z), 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/GX5MX2446820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163ff00bd2616b8a917ce8a4c308b58c03d27a37b6ba04c1097c57cb1b3f9468. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:05:54Z), 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/GX5MX2445366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b3910e1d1efbb76750af26ad9f52abb0d468b206e317ff8db9285d72c4c951. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX8LD2565073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67160f48963277955c6a2b2975c2a6bbf7d8f765a246ed8f911a196aeb21ff3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX8LD2578717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b7859c4067e273808a14cbae1719830d18fb682dd1dac788dab4d21426cd4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX8LD2567427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e873253a2d207232e9efe27da5727f5fdf85e9716bce5c58962c52861593c31. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX8LD2571952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7c5b0336183b9229c698a72f78ef0aaf4b916110f86ad012fb3bdd7270c7f2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:06Z), 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/GX8LD2558101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194c7b924e96696f3e01f6e136045b2dcbf7459700b3af20679f06861dcec1c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:26Z), 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/GX8LD2575093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82cff042ee1274eefb9b88b4ae66a699e2ceefb7b0363a108a9d0c5c3d7118. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:12Z), 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/GX8LD2553801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfeed7029ad7930544e1d6c279860e36ba42d2151986d7ac9c8159a2ae74f2e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/GX8LD2547807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ec74626b4a298180c99bb9c71db92e645dccf457bc4cf4abed37b44d89ef08. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXBDT2547178.