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 0xdc601f59183805ec481f6c7024303172db1b70ef7903a513b19908fcaee1d156. 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/1b89a396-a9d4-45d4-8b42-1fcdf6ae2cd5.json and https://artists.proofprofile.net/proofs/artist/1b89a396-a9d4-45d4-8b42-1fcdf6ae2cd5.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 0xb049838629aca37e5ac9f8453d68d933b2e84b1b7006c2a6ff688570c09559d2. 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/QZNWR2482778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f0040c51ffc43b6d1fca8015b3491c8081dbe014853186741fff9c9c6c2a78. 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/QZZ7U2445569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d31fcd96412bf7b06889aa9e077e7cb7d63ddffc5bec21d8c920f677e3afd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZZ7U2403879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205b05ff823221edbd5255c2cd8f300bc7cc60bc48696917e41a25ec4acb8118. 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/QZZ782424734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65111ffeb9d631aba740ff5b1e4db9926e07d73c1aaf3f66781e16a6c18fd18. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ42574756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ced40e1909725974695f9bc7c74153bcb5e1d3a2b365bf8a60eecf1522580d9. 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/QZFZ42574757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b8e0170d10d485c390fbc146f4dc006bcdbd98de8aac30a6dcf76e491cda3d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZES62563338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3f1b013e76cb014a1e90de51492e4ab341c55b4569221338fddc9f7e776cd8. 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/QZES62563339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe435938bdb6b471d2bfd80cc611b0fbf902320bb864866769c5ab935d1ee3. 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/QZES62563340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b6e8e939bdd11f2dce7946f2a34fcbf90a035f09cb45517a607676d021b3ab. 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/QZES62563342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7452774db50cd4d70dee974e2b678b2b1e02c5e1591c2569834b1267857b4bfc. 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/QZES62563343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fa1937d9e49297337207ba895467550c537812b268f0254bcc2886972f0792. 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/QZWFP2524376.