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 0x3a85ac361107a756d49e6b2f4b6441318138f17b87be4f35665731fba0e68b2d. 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/518deb05-d815-4c69-8ba5-f1cf346567a3.json and https://artists.proofprofile.net/proofs/artist/518deb05-d815-4c69-8ba5-f1cf346567a3.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 0x37fd1a4388246204b3ed959c242fad6df5e803e5c577b74d53ab30d4e5e9accc. 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/FR2X42216624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104ef2cf0cd6746144b4bb7643b0c98da8c1c0c066d769b660fcd51e36a0480f. 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/FR2X42216627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f9445f4778b180d6f45fabb6fdea3c177d0127eb49bbf928b249d40d0a277c. 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/FR2X42216629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0cd6bf53491d3f4783f1fdf0a70afb1eec0cd47058149668bc33e253f3f3c6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:23:06Z), 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/FR2X42216633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363e8ae7235146edffc868ba9bce5b84f7e419d55d5ef76b4182c743988dd3c. 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/FR2X42216635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92d16b7a72c2e4e0153d36ea58675e2eb4dfe5917f8c2e651acb00eadbc3cef. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:27Z), 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/FR2X42216640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14c9decc69fd3e00f8fc27384c707facc80904e944733921d96958ba950deb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR2X42216642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135b2553b58620758278ab53b136a8fff80d5ad55553ae5e4bd0b640aa28084. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:49:56Z), 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/FR2X42216643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e0cb4091a1c14a5c78b847ac6791ed852a14e967aa1b9a10888d77ab107fc2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2X42216645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bb62a20b1ca5ab1f7a48cdab4744fe802ad538a1bc3d092278cff67a211c4. 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/FR2X42216646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe750bbc8186a9b2c4dad70f73e63dd13d272d665f84ca74e7841e00da36c64b3. 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/FR2X42216649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97218c6a9aaa26efd0c21a7109ada62e73c9769d2207a32f4bea3a52d454ab1a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X42216650.