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 0x59a159d03eaa571db2efccb0078217395f0f549a8d8a86054a17e53603d66964. 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/214c956e-a49f-4ab6-8c33-1fc239308fb6.json and https://artists.proofprofile.net/proofs/artist/214c956e-a49f-4ab6-8c33-1fc239308fb6.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 0x3ce46185ab1e868a1f6b9833d2b0082ffadd01c0317888eb29b359c016c076de. 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/QZRP52439472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3768353b666adaeb3276d8ed759d3237f47f061e397df47c580e7dc94e64873. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZRP52439473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56d3fbdd2bb9f80926d2f38f35e1dbfda6b114763ebf61bd93d4b8bb2d83cca. 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/QZRP52439474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e384505cb6bd2d06677385f3f7b777be9e135ec9f4a489bb2fe0669a95c34. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52439475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dc397dccf747de62756177cb495d5b17806cf919d6a6ee793e32c08c0764ce. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZRP52439477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6872493563c3f0795f98a20fb68ba3180394de183748478a5d575eb116024faf. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6M2347680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13967feb6b84f2d7dd4962a350f2c7249a012adf821d2978db8eaa37652f9452. 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/QZZ7S2445871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe52b800590650f283ace9ab5c71d4fa798afb4903f5c2987dd8a9e550ae58. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZTAT2282190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7111482fefa162015ab38c57a1b03e0bf56b6a84a7ba0a73020ccb6e4130c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:21Z), 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/QZZ7S2445874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6872493563c3f0795f98a20fb68ba3180394de183748478a5d575eb116024faf. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6M2347680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe52b800590650f283ace9ab5c71d4fa798afb4903f5c2987dd8a9e550ae58. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:08Z), 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/QZTAT2282190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e62035ece6edb83145a0e63a7df69dd6e82fa9c90e6160e2aea752711fbce1b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2271431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb705afffca3bc029259db3eede07d27a29dcbb2994b718172e34439ffb73f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAS2271434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000d85573f45ab4798de182319b17bf006f52537dcbb83041a44eba12bc679a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAS2271437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8337c67f2d598d4b49e6a1874f1a54034c43984db9e7507c8d3e790234a631ae. 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/QZTAS2271439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac17d2603eded62eeff46ccdd6c580047f0973527a5f2846e8073967232230ce. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTAS2271442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee64ec3208e87e19ed834f37c30835e1120d5e9bfa6889d386579248cbd3fe08. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2214177.