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 0xd105345ebe297944d426f82299775594e775dc59566ceba212eba7cc3aa11e60. 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/f4c3d946-6902-4d87-b90a-655e993423f7.json and https://artists.proofprofile.net/proofs/artist/f4c3d946-6902-4d87-b90a-655e993423f7.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 0xc2e070b11e014d0d4bd019ad9e310e50007d3c19b0a600f09c8b15706f853ee3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS642520274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da643c7f10254d9c6f2b2f69cd03961c52880cb09be35360b5479d2bc5f1ad7. 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/CA5KR2501538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e69e96faee595caba72236ba8465e64fb34d5f99bbdbd61296feccc06a84af5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHL2461386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ac6f8323f7eca1c055abf91f65cccbb3b5978b98d311c1da69b51af77078d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS662438382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb5b97124215de8c854cdf72c448b9da55c38c6dbce339644da18935be04f63. 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/AUK3B2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c16a37bae8d1a2e2f4f7542c34b6922c3d4d02203624b089c2948e771b1a1d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHM2459293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb393f6f26749779afd50a9bbdb9eb776cf34e423424af040ebbef6c49c3d12db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB62338072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d856735f9b2027063a3a7ba3505b35835ffd298aa53b6f40d4cbdf6f92995a9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS662228697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ae88b4465f3866bff7d01c577de564b9b49dc210ef15e63d4d16503b83fb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHN2347169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a08fc2f8bdadf8bd01632e17e88bde0c53bcb62bf0e0a5fa6c5c1d14b26265. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K2300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf980467fb5833842c7dea3e6abf5847b52e96dc6cbe43c7a59069ed987430db3. 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/QZS642333688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc573a88ffea09a4b20c1e8effdd6047f401420ea187e23f72cdd97146cbe999a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHM2359458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc061e844b4d690e4845110457023c1a792d629f4e7e9298ae002eea37bd178ab. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS642394681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba99f1a4f9906526560bc36877d2f67c524c989bfa8255f0d0abffb9995da1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS642369016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001cbdaa80082e20ab225fc7a42c3ab26847b473069f50c9ccc4a0bae0a8cd02. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS642359838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc348514509cad1e0ef53cb0428a33224172a0473d3799ca94a860e51ee3d1ba6. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZMHK2313879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe043fa117d7fd5210a47f01df1c2f6344febf1209ca67c9b0ede0125c67954f. 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/CA5KR2505247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da643c7f10254d9c6f2b2f69cd03961c52880cb09be35360b5479d2bc5f1ad7. 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/CA5KR2501538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b53dadd23b536427748a6d33f77bfa04a2324986aaad75207ecb36c9fc6e8e4. 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/CA5KR2505248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ab108c6475bb23ed301e2d1e76874cef31e19cb6f8834e93cbf0e02bbef181. 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/CA5KR2497571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf2d4b78b4ff758b14df2d16cff4797d9c75201c15c5b4d0ca510942b0399dc. 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/AUK3B2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff0cc1f25552cde57ed4c63b7eab485720c9429142d1a72f630b288199c72f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUK3B2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85ef81022e28546dffc938abe39cd5a83e4618f361a07aad8318edb2cc3b98a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUK3B2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb5b97124215de8c854cdf72c448b9da55c38c6dbce339644da18935be04f63. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUK3B2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bafb3460c8a9a48e1956d529d1b34757e4f4486a6ee8a057a832de9c5bff15. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUK3B2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d11c16d62cfe1f5e791f6d2ee1aeb53e1b024958d1078cf4905eb689c1f4d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUK3B2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8107a0eaead897dfe1c9f450e3d91e1fc5aa245076baab12bb8a1272af3f6b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AUK3B2400032.