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 0xe6f37ba50d078982d0e6a5e93431f78235ff50871bc735ed40a3531fe044c664. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96d552de-cda5-49f5-8f00-cc4f004aa8fb.json and https://artists.proofprofile.net/proofs/artist/96d552de-cda5-49f5-8f00-cc4f004aa8fb.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 0x495543a33156cd4f958300b99c17be0e776b71225869e9fbf471bb49a13c21ed. 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/USJ3V2115461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d28741de9bdc93977ae37fc2b5206790d3d07674a01abdbeff5ae14f22a6fb. 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/QZHN82510410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87caf49716bb0429e93a64edd879de6d94bb11f910ea6bc8f7f49ba807589e44. 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/QZHN82510411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe059e139bf2ce305f088d56371ed2a2723ab157ef4a32269d9139a5302e3a3dc. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZHN82510412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631a21ef00e2ca5e6f7bbf1752ee9e7e79d12375748e36ecc44a1ac1d7e4c517. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:43Z), 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/QZHN82510413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e685610eb625d9c303fc665aa6fafd494c7e75c513b9a6c0be719c08771e0b. 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/QZHN82510414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80d2a079052a0cd08a117994e6fb1b4e29eb2f615275d918e5ae7e44e05590e. 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/QZHN82510415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68267e122e0b44b2801016bdf91cae6f69d170ad615353b23141a8c0b555e32. 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/QZHN82510416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddf04e239330abe1268a24d516deb020106474d37319a571685ac718a3e9fa8. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZHN82510417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5a76ab636e60b7edbf9fefb6afd32c574c36d9c5404a465562e224486b138e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:06:35Z), 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/QZHN82510418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a0bd11992343f12f0e81c643103e766b80f73fe67c713c19ee9540e5166901. 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/QZHN82510419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a87f9d7794256154a1635c2b464e6ee33df65e22ddb0f05b7ca746a5dcb2ed1. 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/QZHN82510420.