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 0xa3c02ddde92cd94051776f1bbeec9cd82584cd5e5345f148efd63f870bfbdb26. 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/e87093df-9bc2-471b-9fd8-290f7d34a908.json and https://artists.proofprofile.net/proofs/artist/e87093df-9bc2-471b-9fd8-290f7d34a908.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 0x79ebb915f722eba4f73564b9bbff46e10d87d3b9a55d3be800b5ea949ae46589. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122341023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78bf12574dbe6dbd4bb124564f87e00887b42f5584c2c790ced803a1600289c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea263219e3ac9b1204f70ca03651a6012f02a7fc58d109985ae3713a750fd1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd15afd04555a5e180ce78c488a12e2629f9fe924fc66dbb63c7826e3cc145. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122341016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d20a2e119dd8a103af8bb8e8214419811d1c99f4ec2d3b382972b9555ffb293. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122341012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c19d1575cfec1f7b69fc103c56e461fc860e784df73c1ae16715a5f75f0229. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e91d46d2c53a429a9f847cf1bb691e840be4a64d290af8ef13d3abf44ceb58. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122341007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc635737c5a52b4d65e585a1a3450d8658e1ab6db036ea99ae5fb3d6a30d683fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ122341004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb3e672c016ebb1b8a70f26232022db0f0a4f29211070e3114a07094328a723. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02ff7b9667cbe171522bec52b7949e47659f4230ac4abafe5bef21e1a1da98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122241047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f22bcee37db9c668eff368d222af637c2bc5aed8e99f4141503e469b918c615. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122241040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283271b9db8c0d834fa44c7d43a55d914ebad1535e0443d81f47e06d582cdbc3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122241027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa880f81d3f6304c3ddcb967f9e6182404bc0e28b90ec98222b3ae5502d35d254. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122241017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a580ea5c8d634c8a171ef5d4b9a539535c6fd768799f1655aa66b085737826. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122241016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe578398a01e7c18c6cab4e9fed47ab65d1068fee38d9f831ca4494c91a0407dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122241004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a53495fd7415efaaa59e2711c2bba8394cb5b424e4aa9f007b8c90bb96bfc9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122241001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa020e9800b5381eeb3db4024096a20fac8d3cac2ea07b64814b023e2756dc8f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122141016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a1c34e7ae38aeaef69cc2861e47718bc5261349f232ec7ebbbd006c06ce65c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ122141012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f83170804f94de664a52e92b22aff702c2511f86ba578f40cff999b1fdd077. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122041404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91673c39e6786d3ba8e3bff7d190c44d92e72d1f7068ae004bdaafdc8fd55b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122341041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2161d491a1a1e646048dcf3b59f1ed1358fdd14684d3978fec6872bbb561d385. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ122341032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58377ebf193590e60487956d3a2d7bfdca110fdfc83ac5d3cc96b83ede6724a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ122341053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554ef15e2be177f29b36e4b42176b30729d16d2dd8f3c67cabadb9517919c777. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122341052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf7fdae87e35d3fbc8769f0dc58e155c58ecab333bc2bf0a021f840fd0cf22f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122541006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e83490a427ccbd1195f3d9b65072428739a4d53d06968315590aaef41974b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ122441054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75292cf627eec0ff15310cde363cd87015d6eccb55bd4e2820a2473d94f93dc0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ122446038.