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 0xb3a90cffe050e68181537f79d9593f518ebf14235c613fdf4693f8f3a75014b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdfc7911-8d34-4e6d-b542-93f9ce842041.json and https://artists.proofprofile.net/proofs/artist/fdfc7911-8d34-4e6d-b542-93f9ce842041.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 0x2fcab002e04296520789f29da5749dd0edf057cb4ad38ea9a8a15d18e52b1969. 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/QZWFJ2588890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ee51c2bf5dd629b48dca8e891a3684790b69bdf256bb1fbe286dfa581928cf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2588803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9a10e6cbd3da9e94f1b67dbf846559c705d340570c86bb390c01661e8a014d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFK2585160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424a52fab6a3e13350688405865b6ea0669f388f0afc84875c3e706c7e891d8b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:18Z), 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/QZWFK2585083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b9e7e6beebb13a41fc788a80cb157d3b0a2781c83307bd376a0194c02e5efa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ772503190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963634b8c43ce8c003f78d12c23c0b518f6601aabeae377abeb4d2eff8e42754. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:47Z), 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/QZZ772505407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329317892934919e709f9716de11a53a9e91145e4afe5ffc8d60249c0ef48ca7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ772521624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd109afba46eeed0d7ef846f0fb43cdf6d8dd463d340053e584b770a5bd276417. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ772521613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116392177ef50cdc6318a2d700a6b634602af3c1d3d9197a13e6679cfcf6a64d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ772542532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb812916ab21715aedf7df58fb81fc24579f5cbbb247396cefb0dac96b07c483. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ772565676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947680f2276b57c398750fb800fb703cea5b7e44365424dcde994342eb161af9. 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/QZZ772545020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa125abb30e4c0aaa0c2560b83f6f0c542ee7246c77c5b58e742f1089c4161907. 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/QZZ772565669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f73c2309695693f0783c4f9ae11b287435e6af2576a2b03eae1e3ad29c951e9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ772565656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e900e77c9f5385afb6ed834bd8ce64df34269f25f996dc7ea06bbfdef085c7. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:50:51Z), 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/QZZ772545041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfbb162438bb821a4aa7fd88a44f784b2222014db5b5bb0327807f645e45cfd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ772563195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f04b987c77728345f07cd84fd819f2a12cd20f63514217273bac3f6c03f47d. 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/QZZ782516095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f828d92fdb8105a824ecb6e02be676f1f9f3e60a11dd2987453bd0cee63783. 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/QZZ782516062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ac7783c6068afad7d9ae19783294d1b3629f2ed04f3e4db9ce9acdc7a19f0. 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/QZZ782516089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a6ee4e8636e15759cc6602267e22d2554d51267363546ba26964d7fa6deafe. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ782516077.