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 0x46e7b677de398896f504e8f59d454fd67926989d6c8054e61c2d696b898b1b61. 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/027ac4bf-ab6d-4641-a9b9-22465044915c.json and https://artists.proofprofile.net/proofs/artist/027ac4bf-ab6d-4641-a9b9-22465044915c.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 0x3a2bb15b0c4a57fc1f046d7f3b420a048e522b50f5f8e82feb4c9c8d16b22be5. 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/QZWFQ2365481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bb15b0c4a57fc1f046d7f3b420a048e522b50f5f8e82feb4c9c8d16b22be5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFQ2365481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cea2d55b6778cee094777791be695aae7bed65030e59faba7870646fb97ace5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFF2355456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78af40a8a2834629f0047272ff5df51535f2dd2f2d8e32cf7fdfe700f25a48dd. 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/QZWFH2342103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fd271bc56d1cd33d3a1ec8ac4b217a27abc45de1d827b2de7bc4309f4ebf4a. 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/QZWFQ2364768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d8f2a705f8da095c43b6ac9ffafcaef2a5ca48b776a84198a399f7066e7b5. 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/QZNWS2449525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96899cdba22b3b35ecc00a1152176e6e20af51b6c8afc7dd5037b89b3b227bc0. 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/QZNWW2460479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d8f2a705f8da095c43b6ac9ffafcaef2a5ca48b776a84198a399f7066e7b5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWS2449525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855dd1b8263335c8e784d53e814c3aeddf223fa4e35938c7b0aa6fe0523b971. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTB32434015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96899cdba22b3b35ecc00a1152176e6e20af51b6c8afc7dd5037b89b3b227bc0. 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/QZNWW2460479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d8f2a705f8da095c43b6ac9ffafcaef2a5ca48b776a84198a399f7066e7b5. 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/QZNWS2449525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bbd11bdd582b0d8ebb4edbf1881a568f64609fc2ccce8b45e26037e775c29f. 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/QZWFK2402955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855dd1b8263335c8e784d53e814c3aeddf223fa4e35938c7b0aa6fe0523b971. 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/QZTB32434015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96899cdba22b3b35ecc00a1152176e6e20af51b6c8afc7dd5037b89b3b227bc0. 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/QZNWW2460479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d8f2a705f8da095c43b6ac9ffafcaef2a5ca48b776a84198a399f7066e7b5. 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/QZNWS2449525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282daddee952f2a12f632c18e68faff59854a80d5129c1c36011ef50f189d13. 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/QZES62589604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a47552981a47bb03f8314e567a1f2fd416934296746d4e162b154a4e4a8bbfe. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES62589605.