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 0x69689995f7e500b85fc1604f6f9f0a6cb683a39f8bbae1c20c3de38f5a397dd1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/719277b1-ba7d-4752-a618-d2061fb211ba.json and https://artists.proofprofile.net/proofs/artist/719277b1-ba7d-4752-a618-d2061fb211ba.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 0x69d4f1e09f5d30e3d6ef35507eaa99bbbf5ac06df3d985325c920010da4143b5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ITAXQ2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f6791686caacecc26a7547aff463d4a383bbd0aabdae3030b444d2aa7cf5a4. 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/ITAXQ2400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf107740a62f0913f82bca4362020aa29a7f9b75aa67d589c1f881304749faaf2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZRP52467049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b3273e283a018d0697d23b1ae47561cd797dcf59a68ee1d278bdf93c1b9c4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITAXQ2400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9530b92da73fd5bea406e16f6d9401b0f197531b82f1c82c3b0cae24f2ddbe. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ITAXQ2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba3d3644f0b96e5f7bba1dba2b43bd5b7ff58cb02023aa0e1a3dcb775df2d12. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITAXQ2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e821de5c2e96ccb54530d5621fcdf976b73079f168a0c89aa88fe85b52b118. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITAXQ2500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4541dd51e3d1a90de3042de086b39693596a2ce4de391c2a237dc38cbf5978d4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ITAXQ2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48dd2905059f9a6cc412f09fb722a809505e83420a7d8595db00f1a2b93d254. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:45Z), 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/ITAXQ2500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73857ac44cd92612bac052da1080a563d42d2c2a087224e1efda57763a176b3c. 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/ITAXQ2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5004bfd90ca8b846cdbe98e9b9b1dbef277c788826a2a66d18ce3ac6f5924382. 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/ITAXQ2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09375f46b91aedbf296f8076877202bdad150cbdc9c528b4a2d6555ddd365fe5. 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/ITAXQ2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73857ac44cd92612bac052da1080a563d42d2c2a087224e1efda57763a176b3c. 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/ITAXQ2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5004bfd90ca8b846cdbe98e9b9b1dbef277c788826a2a66d18ce3ac6f5924382. 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/ITAXQ2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09375f46b91aedbf296f8076877202bdad150cbdc9c528b4a2d6555ddd365fe5. 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/ITAXQ2500033.