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 0xd01869b690fd7b291252f1fb841bec207e824dcbdbc720325ef37d6c61145b3b. 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/3b4985c9-6bb4-4c70-9ce9-6792835e8be4.json and https://artists.proofprofile.net/proofs/artist/3b4985c9-6bb4-4c70-9ce9-6792835e8be4.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 0xf24e1f150b900d6d19a0fc43ac1d7257287e76614cfdf81387b9d6585f7a5ad1. 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/QZNJY2373135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7719aad4fd4f7caa100ac4d988af243da2e1882b354534f0377752dce5451d1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:47Z), 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/US7VG2457621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cc99e95ab76b2ed6bb44e8662c79dbae8ad5034fd3b85e2ebb9b3122130623. 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/QZNWV2477418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b18f68de45e3ec6f08a71fed0675b114c7186e57096b382f338a860fe64519. 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/QZPLR2426022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d593274d4a63e25ec869e96ed7b319c13177ddb2e62bb48aa6a29bf5a54b0c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB42476256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61cb626486f9d39a9c31d8300af95a1cd091bc710c46ced2ad3d06f96763ed4. 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/QZWFN2458438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df9de55f5c24b6f3a676239de960c38e4e462b640bfe0705714805e38bc91e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9K2408965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f519353a16ce18776481a4971527abd16af3d9a0ca860ecc1f24c005f87489. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2546316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b7943cb9057618cc822f2353311d12c4bd4bebcfc21b0d56bba5e18d9b23f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMZ92533909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3791ab0603ee9c61c9dcaad570a3201dec21317bd2ab381a1be0b8c3a0586a. 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/QZMZ92575829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc06538b13ff3a97c101677ac38af1dfff1d43e6ce8f5ac72a1f4b1640ce5f57. 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/QZMZ92577747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dca9b8886f2b4f54d54f638e211d084e80f10a17ce7037114af33eb58c1e76. 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/QZNJW2553204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8455bcf31c2f8281195d6c99eb3e3023440fc87fcdf81b86e0464698b5b7e19. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJX2510061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d8b7cf6a7ec9d9577f12fb702808bb3b0fa20c4ed7871014d734205100dbc. 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/QZNJX2576125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1bedf83ff6ecffdbba39dbef547a3f97240b6570cd87d45a0374baefe8d34f. 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/QZWFN2554926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4375b218822c5fc7d99d20ac1ac4c239efaab4743c91b9d7b44bb1cb431025bf. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFS2548595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107937265bbcc0b2c49f28e9ba8fec5bec4db7785d661fd06ef2fd4ce62b944c. 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/QZZ792544148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdf37489b2164d8ad8bb2778793d5d3e61883328a15fbae267aa77793fdda51. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7M2566265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2054b4e19fe62ec28e642fbb987702a78cd463890474dd8f59e3217571240685. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:23Z), 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/QT3EY2534209.