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 0x31af4a7cb0d9749e22c5bc03039a32edc282f968d7269ba35a1b004060c37419. 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/8f1cb39a-1079-4963-9595-e32b40ee55ce.json and https://artists.proofprofile.net/proofs/artist/8f1cb39a-1079-4963-9595-e32b40ee55ce.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 0x19c4ba990d669ab17e5557ea9ae56a3242b9d045bf1e286f6277476897f4cd2b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2157582.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee27fd076309090d44f338e42edd650edd2430eb5ee6215269eefe68d4e4718. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6M2157583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57448e0c5fe3540d51a1cbab99aff422056dfe388d2dd7b077fb5cc8366fac8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6L2149100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ed5be96b972869092d9a5e8c70b1ae87c94b45343613bc8d25cbc253d25c76. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6L2149103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f07116163b367983eeac7b026c9ac3d5b9ec0b6e7c0e81178c56a76b334353. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:25:54Z), 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/QZK6L2149104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed94638c461273f7a6b7ccea500260eec533ae0b6b91189638ceb9af36dc8de. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZK6L2149108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ab79f64dbdc08741cb346acdc7ac46879f659cc6ae7b83f518084f24dec4b9. 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/QZNWQ2157249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ffe79ea7b077ac42b1df6df1b714b0cf879dc40eeeb9ee8b4962708e3ce9c9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES92295889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d8038f89a11c78044bec2446f31786afe327f2eeccddea17bba762a0bb70aa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBB2236885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2849cb8f088eb5ac7726bdb890bc2f0e8b883e48dfc95b76e2b63d5594b5a73. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:25Z), 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/QZTBB2236889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7666a26046c1228e448ccbdb6b34cc98d7883a344668a2909576d05d7a829ac. 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/QZTBB2236890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d64d1eb4d3c5e55e3aec6fd6dd64d1c6341cfd4fe2bc7d5a482b1c76bfb3d3. 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/QZTBB2236894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4615bcc22b04b64997028d24d95ffe797d5758290061dc980e9b7408b66984. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBB2236900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40739a2342ae84fb9827c548bcc786d17790ae9c28d79cc9e77e068ed6817916. 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/QZTBB2236908.
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