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 0xf3c5eccec2d7a33582c8c070f5f3d663a11f58c7565ab752e203619035e282d3. 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/549de3e7-8f56-45bc-966a-9edf9367c5dc.json and https://artists.proofprofile.net/proofs/artist/549de3e7-8f56-45bc-966a-9edf9367c5dc.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 0xc6b286acd7516bf92c1b28970a47efb3769e8316855eba7dcf8220fe423e39cb. 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/SE5Q51900636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e2f7907a24cd798b544a63d7fdb3f294ec0847bc4319c72cb7d73c88b6f738. 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/SE5Q51900608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59caae6ff2d89cef3d68d85cce5d75d5d5b624d8acede65fff63f227e4a16fe0. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:27:24Z), 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/SE5Q51900416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556620c2d84dab79ba8da9ce3e36c360132aef9dd416d901ac06fcce62f9d313. 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/SE5Q51901008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e7c44d459cb6be2fe2a9a39e244269914f3f38a4514bf5925f6d9fb8e0550b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/SE5Q51904003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a22f6ca3cd856ffcb8d65650f81955708ee403d6accbc411c26ae02f7a7f8cd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/SE5Q52001762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8a7418ef77d9b02da634b98ce5b53ce829ee83a89c03dc436a8721b01a9b34. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5Q52002252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e15a38d8daa029bf87f84384cfd805d9203eb66ae1a958ddbaec22a0a10e268. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE5Q52101425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa710363ea76aaeeae28ca2de84618879d31bd01d50be4af4e28cefd6b3af2af1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q52100924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d7aa8442728709658ac6ed4f62f76da418ddb96496141b98d11f73de9bf68f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE5Q52102171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d19ce5a01748c997d8e046bdd3aba5fb2ca9ed7e2b9d03c1895d708f2f8b51. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE5Q52103869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ace4c9d3b3b0161fd3d11aa3fe26be0ab0b2dc3ad4e23a9d346473e3e145c. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/SE5Q52201863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08411f05e5b7eaeccde3998ed419142ad5fae8dcee87a4ddf6acb5d869b0f2a8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE5Q52501183.