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 0xd6fa9fc7eb64192d97868e482d6e64133cf64b2d6f29b67cc9ab7cbc4433cfa2. Chain 2 (Bitcoin): anchored in block 953721 (2026-06-15T01:12:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a7eb217-433a-4367-bbcb-89b9bf419054.json and https://artists.proofprofile.net/proofs/artist/8a7eb217-433a-4367-bbcb-89b9bf419054.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 0xeb4bd8da3d2a637892dcbddc6aa77c243c9933bfdfad31a40e7f57e0d245f3fc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNC2226814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ede4a811cef8ba6395576c3ee299bd201c4906f6ec7e788abd7e0e7f37a798f. 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/QZDA52215810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7785c2cc16d826a5653fdf250f69d03f1729e17c11d56c996c9853484018b0e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP42280419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf91e9f23cff6baea26e1cc0946c75939d4694adabeb2989f45149700402321. 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/QZTB42227533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c886bc05fa16ea1f87f108acd96836212ade05b35ca47346a5c840e6e458bc6. 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/QZWFS2329354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827e725ca431a51f5a9111fc51a9edc0c3e340fa60d02b5f53260399e1f1ee5. 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/QZRP42459580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7280ea9d57bfdb00b613fcc19914e9df9632483cd21419ba78534affec194. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFQ2442297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c886bc05fa16ea1f87f108acd96836212ade05b35ca47346a5c840e6e458bc6. 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/QZWFS2329354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab0672565912a825a676b61f6db2a673d91b99bbceb316dd79a35072869157b. 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/QT3EZ2492187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827e725ca431a51f5a9111fc51a9edc0c3e340fa60d02b5f53260399e1f1ee5. 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/QZRP42459580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab0672565912a825a676b61f6db2a673d91b99bbceb316dd79a35072869157b. 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/QT3EZ2492187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85215c5a365762ff9f9f6193b849debdc0c99df6a7f04c62665d817a8438373. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZK6L2548658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d874c8f83c8185022a4b2b2ce36abbf71be5495be18944f137edfeb5e6faa. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZHNC2524723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab0672565912a825a676b61f6db2a673d91b99bbceb316dd79a35072869157b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EZ2492187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83362087bcae9a6b1e8bae99cf7c6eed5a15f3b0f15623d01931328c9dae565. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZK6M2272643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca6680ed9f3ca0afa8781867b7c614037d66e0f1accbaf9f755c92066de237. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZNWY2552627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17f22f6a40028c4253b17d81c53528d5af32f9b2af5fe052de952dfcc5bfaa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFK2553794.