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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a395377689a9e27393eaaca93ac6bcd9af38fbdce0878e4d1d4043a4bc0c0. 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/e155b39d-c0ad-44ab-acfe-cf5777da9737.json and https://artists.proofprofile.net/proofs/artist/e155b39d-c0ad-44ab-acfe-cf5777da9737.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bc62e52219b93d3846cbdf530303754afd5a1f91eb3911953e7cfcd11e1e08. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZP7F2457430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286293247a34b0e4a4bf8a1c28a506d6e7859e7ca8673607b8163e96b09d4d8. 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/QZP7F2457431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa550deefc89ff24a3db3dbfdbd15bc831e5e6aaec7c0555e3dfba0e004ea278. 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/QZP7F2457432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f83482342b04c816e4a6cfa37b38b154e3a8a208f885182d1e7d27a1162fca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZP7F2457433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052b54c4b7e8eda23687115fdf785eea970e75c500d0ff591acb5c58da2d261. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZP7F2457434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba8c3d882fca4cd9a66dc7d6094d192bfb51ed9d6f71c82e9437605711eea3b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZP7F2457435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2137eee12ab7c126ea2b00f19c72169742b97d34dd74b4aaaf4418e1cc14e388. 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/QZP7F2457436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3561539154af7085749b27c87bf6a7a36b6e0cb331669073c8b175fcbc7065ed. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZP7F2457437.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbec77c9464cc7a039877a59b95e653cb79cd78850435a8dcffb3ab04421b3f1. 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/QZWDW2428771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dc29c14cd55f011bc4803dfaadcb957f7df27ee0a6060c68e59774e53a93cd. 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/QZWDW2428772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88508fc4c7b355a8b87d297558baaddd2b022c276faae5bd2b9cc9c72c6c8cfa. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZWDW2428773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8331bfa7981a01a6aa19015e205f9666057cf9081f9c08a843f94bb5b7481c. 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/QZWDW2428774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1509ed89f52a23c8e9b813624ff94b76d137d31a1392d58e2fcae0e5d131384. 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/QZWDW2428775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae190fa9f630bfde7b4de7340158ad9b7b2bfa654340c02fa6d588af962e02e. 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/QZWDW2428776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1c651d28facccee3c412867a242ef5da37c31d03ed52932f23221354a354ae. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZWDW2428777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4491fee7bca5934fac072a0818bbc0a7b433a46416cd766cf4af763551c5beee. 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/QZWDW2428778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c94bc3d189c627e3df8640cb491c1f60e2bc98e2f4419bf563a0c3d23b947e9. 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/QZWDW2428779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4138a316ba4f29ed7190b34c801ca3a4fcfaf0837ba9809f5fb7c62c3b2d90. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZYFZ2485253.