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 0x1d80efc79d19dd5eec5a2ffea328ca8eea83ccc57fc158a86d95b24a95133f4b. 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/5696d2f9-dff3-4996-b7b3-6503bacc5dea.json and https://artists.proofprofile.net/proofs/artist/5696d2f9-dff3-4996-b7b3-6503bacc5dea.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 0x2b249230fce5659df0f188816c56707797eeea79a5c5c07c61f34cab7b4f79b6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTAT2192521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4f1344a8e8c39ecaddf86a986b52f70cab4be0ba43c8283e6bef4f73cfbb84. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA42285294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb1162adacde5f84227db0de0bead0ecbf08737691a495c6698bdfff380144. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:39Z), 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/QZES52223090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85adef7a9c3c9612d6c88c2ffc39e2de4a89763591fba017357f3be97bc5aa65. 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/QZK6N2210052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95683fd49c79e3caaa1718ed472f52b8ca371b31a378bab7906bd143c6fcc73b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:23Z), 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/QZMEQ2241681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e59f9e5f25901178772730103d28f4a30ca9eecbce467f991db8cec790bd04d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:11:12Z), 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/QZFYZ2331601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d84481eff47748098873dff59ec197ce5ee4aa9081348720eea2d4a566822. 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/QZFZ32329119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c285b54d85cc3da3200c3c5ec632146cc6ba8eed8b7c7e7c30640ebbae09fbe. 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/QZFZ72393701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fdd46845c822d9bedfdd0b7941592b45cc707345baea6f0144ebef168acec9. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMEP2396934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02995c0fc4800d4092fcd77275c4c07029d87a3d904d5c1fc91ff9f5557583c9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWS2340516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cdd6086ccab7ad1ce95bd1dd6a7728a2b01a7a8808af511a9c7726098a671d. 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/QZTBD2377089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9681be4f837370a0bf5fae2d6d46bc8b206b337bbd4c7903c5fc89b50c88b87. 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/QZFYX2416829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe1be05d0b645f4e686f134f83bb3c77d2df2c16f1b7ca20b96e092e0db85f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEP2474963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070523032ea544d3bfc3a16585e84faa655b6e01a27353b72af429c1476ab68e. 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/QZNWW2491900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f2a67676c81ffcde4d004028451315df432fe4b121c0d07cb19add21bc92a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:27Z), 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/QZTB62458124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5795681060f68ed19c269097193a3c57a416f6c17e0c6a354a39ddc0b61f1466. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:20Z), 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/QZWFL2418968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4a3d72a36814b081a5279c18b0f561e084cfa05a44a1d0ad9c1767095a4f5d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZWFU2464043.