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 0xe407bfcd2dfa31c43ca693c386ba2cac49f4ad0d93952fd9539efc896a55fae5. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa9f38d-a34b-44c2-98f9-5aa9306f2e78.json and https://artists.proofprofile.net/proofs/artist/7aa9f38d-a34b-44c2-98f9-5aa9306f2e78.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 0x2283d5d74b73b8a7b278a8f082121d42415345c1a23b80f335cc8b2bbbf3dfa2. 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/BKDIV2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61bdf4645c2e23076fa816fff496ef806919618e9500935ddb70f4c2cb087e5. 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/BKDIV2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d3c0515d9026cfe8ed8c846b50dbe07aaabf227418da27e8c6353b154df9a. 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/BKDIV2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ee595d0c50addd92d2574918e69b8904fbf1fdfd3b14b91740de47592cf4c6. 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/BKDIV2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1627e896435f9752917b71f09f6253d60631d767572de0f2992dbb6476ebd261. 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/BKDIV2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf1967e3f4bf20f08fc149009a358d75e1e665b8987b59050fbb1db22013c52. 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/BKDIV2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd46199faa073b9a4e0512fee52c25dadc7c3f0f70ab00e5b077e99d395aa7fb. 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/BKDIV2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43503ed98d69f1ad09573cfa110c2a13ff7d55d123e00fe57a8eaa8ae29a74ba. 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/BKDIV2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a787d6986382d2d756135cd96b13664b6d04a330ba8773c5eb21e13d1d6ed2c. 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/BKDIV2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240088297b9213886a209751ee6f37ea4dbd65529b2bda0c6630f9c894684988. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BKDIV2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d242df7ebbdc53a98159138db19c916ac3d056b5953e18be5f3457759d75d9. 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/BKDIV2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9924d213dcbee4c7fc953719c2b3fefccd2895f44866f618675f1d52b0397901. 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/BKDIV2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba5b10c0aec3819a4cf7e768992a699046b810d97a75ea0f00a9f12f8cc3be. 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/BKDIV2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d242df7ebbdc53a98159138db19c916ac3d056b5953e18be5f3457759d75d9. 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/BKDIV2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464dd96155e5424be1f40e522293f88d658b21e9841039dcf6b95e79c1ec2f00. 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/BKDIV2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a787d6986382d2d756135cd96b13664b6d04a330ba8773c5eb21e13d1d6ed2c. 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/BKDIV2200017.