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 0x2c0ecc13cece1d43e60765c18c5dc9c5a5f292ccd652cac796568b04e25d60f9. 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/530b9ff5-6d8c-43fa-b21b-5eb8a7984cc9.json and https://artists.proofprofile.net/proofs/artist/530b9ff5-6d8c-43fa-b21b-5eb8a7984cc9.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 0xdeeafc2e5014681a8ed6113c66f43ff6e6f9b281a1de8fcb744ef65ac8224f6d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWR2246593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3ee3f831b2f33fb9647b889a4066ad10beb211c17405047f9e4b227bf09e7f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAS2254838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d7302d57f798f515ffdcc6e612a94a562400bea55b7ff9f9161427fc5975c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB32230749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34395bfe77ac73d415442f54f07f725c93ef3e828edd7574e1a08cf4bad6ed93. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA62334972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac50a70a3e2ca35bf97a8c38fa8bb1cb7c2ad4cfef4d08389b471f4f5b130dd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN92390094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc317c534cfa53fe7b864392c9364854fa22301fe0407b07d6032e0dabe84f70d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWQ2359974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cfb573ae4ccad43affcaf9cf2e0ccc76323ca5aeb290a7dcc5f06e478fb03e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFL2372794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd56c0aff879c008660b9d876ff192f9006a771921a1a35f1c0706a4aee0d9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWT2461070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0941bd2a2d8cf2618a1dfdaa791df7691181a404e4b6a2d1bfc403dbf0380564. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42477703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeaae7c536d1fbb62c0b5ab4ec7744ec441a9d9e3ea60be0d01f3f2c47af3a4. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZWFG2446259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92930fdab8757141680779fa4f5b4174610d5e3d7546fbf0385e870759905e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFG2448738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a9cb2c578c2b7a36ac5453c3ebe3c1793135738904f856f2b6caef2c3e361. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFS2490429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8e656c9f29379d07f5289a7f7dd1ddef0c59d06b565260348746a883923a26. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7L2429597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae485871739cf6653f3ca5a37d5d7e02865005fdd27236b0c8da3aed45db2d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72561117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a4c4f666e428734d243aed3cee34312c55516bf8517796faabfbca2622ce1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72561121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d8c4d9365a56bd1cc517dcfd46b3e47e6c6f783aab0b1cb2153f2ca363f3d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72561118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18e8a409f23cc7b70ec0d46f1a35509913f3db77351e6945922afde3f05f027. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:47Z), 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/QZDA72561119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e689fd4c3b584d0397e5c0297d0ffae0168452a63467814b273d506d073628. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA72561120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ec722163d32dc0794861a0dac798f0258a4b6e67d17edb015672595d3f297f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZMEM2543369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16dd4128cfe2b5eb0afe5f4a21457b42cb5546c599cad18258884c169116b2f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTAS2533581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ba443ce876a190b9c4624fbad951afdeeb8cbb9b142951ad8a98b414be3cde. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTAS2533577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102132dcbe229357419afe9506a86208f48c47f549898cd2db3d0f3dc9c795ea. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAS2533575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32a8e450c4589a39242f76362a45f35f1f185447afccc656bed12d1cbd46e42. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:25:48Z), 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/QZTAS2533580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b678d2de3804763177e0aea9cba40c812e1f9614cf2cdbc19ea301f4181544d. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTAS2533576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb406f9c24d04dea1ca7ab5b06704d68b9a7e8fb3f18cbe81dc3768c74ed055. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2533578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf343184317c3892655478dfd0ab8f39b7152153f5e3c638f84469222f21d482b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:33:26Z), 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/QZTAS2533574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c3c668aebe5cba82b2bce86f91bc499eae55b6dc762803daa5421243b56a5c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:32Z), 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/QZTAS2533579.