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 0xe6fac590fd86a0d795b86d07ceac8a86d30871167c8e4797e1388b28b91c7fb3. 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/25e21771-aa4f-4eb6-be2d-35dadf5b0aca.json and https://artists.proofprofile.net/proofs/artist/25e21771-aa4f-4eb6-be2d-35dadf5b0aca.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 0xae7482c363b02748c5cf480cf8546cb8a2982c8e9a73b1e61194ea960ff78167. 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/QZHN82220779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279405cce8f0bd2e26c87ac4ea5fc6095aa1fbf9c96a5c9933475b6ce80ecc59. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:44:52Z), 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/QZHN82220783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7cbdf92f70f40cbc466c5f952222239edfcd319c5150da274ff0cbb389467a. 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/QZK6P2310483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d18c6855d1f67c6baa25de1fb884b9b46b2c5dfac30118f2f764e0f3013465b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHN52421238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17069181468a96234c2af2a4b190ad296557d490e5ef1588d483caad0e03093. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6N2481492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f51770e32ff02d4be786a74f3a70ec078ac559405d9daa151db0adaa9f1e10a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZTAU2428088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba999a6b9986a875b7883adf498e788513a183ec5a1fcc05c5a3aeaac0a3501c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTB52428162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194646288364f9e2acd566c40ce2ecc2864726def28b4ea31b6956be78e75838. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB52428165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08979120f45f226aa85c5f28998407fa5faa866218d146daa9483aa1909f4a. 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/QZTB52428171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb99c414748e1a7a96905b92662388e94b3eafd938c41102c7db8113381fd99. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTBB2495720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c99c272f59fabbe9e8dd6c4a6ce1f6bba21fa9ce4e5ffd00a7f12d7bd0979c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:52Z), 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/QZZ7L2495931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c406c857d3386363f69a30d96c054644820d530d90d2bb533c50a940d40104. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHN32589640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609056259aaeb55cc114d88e43722b4810e219e9885192591899df2266a914e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTAY2572113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda757674895a3a4b23d045b7a5dfd242f62d5f276e5923e0b3d245fdbbc90721. 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/QZTBB2504782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c5ec03be72439c6f19016a05c37c91a3fbe5e1d6947f3398dd8e9603f83e1b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:32Z), 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/QZTBB2504785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb540804e669baf2355df9bfb62bc2489b0a39dedd21e86406110de2be5b4f351. 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/QZWFS2554987.