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 0xfc2164fffe7576ded092b0a64dbcba86fcce24c0d027287aef02fa2d5568e883. 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/7d06c553-6e06-486f-8e73-da7fe630f718.json and https://artists.proofprofile.net/proofs/artist/7d06c553-6e06-486f-8e73-da7fe630f718.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 0x15025888a45426e2fbe7b498af1c84c68f29fe2f3ba45c2ecc8dbeaa2116ca50. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZEQU2060461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8875a6004c7b14d0f395cafc2802cde2b80f6da81ef0bf43bc3cf882b83c783e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZEQU2060463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e9837b2333a41e8936da2ad6fb758048099e0f7fdeeca91dc748eef70cc10a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZEQU2060464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8111f81b7afb8f1c8d8c845d79cf985a934b59666005659a107e4476899a9a61. 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/QZEQU2060469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43cb08dd756c782133d5cd0fa3793a1cf7246cf9952eb2644e327b7f84ecc52. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:37Z), 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/QZEQU2060470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26a2ff963595b857e44d18d9d27600f518769f70704df916af3da395c5ce008. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:58Z), 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/QZEQU2060471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c0e7e446f26bb053b0d240e593bb78d933890bcdf60db3b41e492c61e07490. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZEQU2060472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e503daec85a4b5b746a0f051da283c75b044d79babd4aae6d407558ac9b95a. 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/QZEQU2060416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde10d08636307d9ccd22125f969a05ab54489025713f2348d2eb49617ff0ea6d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZEQU2060417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c0f01edcdbe0bf9347d4247dadda42d92eec33e760ec333f20ed89aa8fb09a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:00Z), 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/QZEQU2060419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb2eb1d54e2eecad12e65354838bdacc532df0740a7dab481d53706aa1f5d92. 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/QZEQU2060420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84bb3ab2b31922b285c1e0eadda320262b4d11732ffc53ecbfebc9848d34c20. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:51Z), 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/QZEQU2060421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d52023a16db186a24515125ba2f3f539dfd0c5d41c42aed678069efeea2872. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZEQU2060422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec13e894f4042cd094b2204c9984d68a0b341d7dca2f8c00e8d1137fb28bc7. 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/QZEQU2060423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e9a87dabf0119355f1133ac7b5ea4682bd9703b1e876bf90742dac8eb35e89. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:33Z), 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/QZEQU2060424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158dcf9596112cca64c79ec73b2a0036640217eae3768e13038e439f207b9bc1. 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/QZEQU2060428.