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 0x7797c6f20f6bbc926079982023e53e5686386eda392caad88aae844ecf93ab57. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cfec141-183e-4177-98ef-b3db34ec527d.json and https://artists.proofprofile.net/proofs/artist/6cfec141-183e-4177-98ef-b3db34ec527d.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 0x9b414d87bef16eb68df05087d23bf1969e241cca55ce30cef0eefbb31e2169f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US6YC2203759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5cc4793af44b57add2bbce3081c541dc3b0a90c3f75602a03db2c86deadf82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US6YC2203757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83166bc4868e01ce30053df1243439b836aec18ac4d637a25383aedc0b7421f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US6YC2203808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb27bac178a14c72ae64f500ea667d999030f84cecf6cd1f6a4d202c603d5d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US6YC2203847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ae394bd97b8ca2d06ecc650b315aab1c32ec42b6ec94e1ef55351bc2fe9cb6. 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/US6YC2203914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5937f5a11e7bbbfa085d6f703d3d0236dfaef512a5d0db2475bddc5096d1e959. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US6YC2203989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff89cf72d523bd6401c5cca4b3ef600612591e3d09576963c1c31eedd1c9a65. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:11Z), 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/US6YC2203990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37199d6f3411450c655b65072ddae0092f2029dfa78d7b8195673893917d193. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/US6YC2203991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6536e43246d8673278e404855b0d059002cf47856a34a3a85aabf3f19691c33a. 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/QZNMW2272796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72da04b8f36ec885c00ad6379825593c5db42d3dac0d404f4f7119abc48156. 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/US6YC2305191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6216cd31af7577173a55fafd5863b24a9885f36848b583cc0d570509758584. 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/QZQAY2452896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c93436e76f52a22a1ab16d67074cf530c116a00f5bd55bd43b263c3ed1c06. 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/US6YC2405370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a27a27163eafb07bacc0b363062b0690c6101ddea996c845cbc48940c34c54. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62200471.