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 0x5e958b8df30fb6b4bc7edb3e5291da61d661d7aa95ddafeecce6d877cfbc4dca. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d66fefe5-38a3-41f4-8c36-6f07356c0608.json and https://artists.proofprofile.net/proofs/artist/d66fefe5-38a3-41f4-8c36-6f07356c0608.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 0xff37740dfd3ad42b548d2e4a8c5e4304df46e4da5ac4903581fbadc7227bbef2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:09Z), 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/CH5331500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad30a7e7e861b52e37afbfdcdec9f55ad6b30db76e241fec8f85327de5755ddd. 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/CH5331600314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02eeb5318c243499d2d5d79cebd702c7e22c808295f8214f6b1610d873c80f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH5331400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c107a30e603a1838ba42820854ecc319da782f4a5d1ba0d57f9550ea60f8ec2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ATB842100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51b65680a5d7800b1bca1bfb8c93631c04d7ad2a1797c08a4fe47ff1b49e58b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:36Z), 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/ATB842100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278b1287a789373e6db54a5a5ec77063a7f373a7767ca0f8cd9ea2b3c279502c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ATB842100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cca8698b01397c10fb2bc64fd44b6d6c6319d2a53105008759e16b9e2e0f30. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ATB842100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee698e12994f7f63d682849424e29a68c0653998dc10b416416e44349ef7d9a. 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/ATB842100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb138300ee66797cad3bf5c97fcb4971faef851c3b526b85fd508c06838efc6a3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:23Z), 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/ATB842100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60794367607b0fa270d3dca472cdd2385a0fbf0ef0a7311d63123cdff28d7db4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ATB842000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60394dcd4c24247c0352775e7686d74a128484c26a8a12a84ef1a43e13c0113f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ATB842000094.