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 0x5ff8f7f599bb318af0499f53ca25d67cfc6c634b6d009b558c56d699ea9c1ce9. 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/e2c9bed7-b7d4-434b-afa4-8a34298f037b.json and https://artists.proofprofile.net/proofs/artist/e2c9bed7-b7d4-434b-afa4-8a34298f037b.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 0x4d08718db4c1f0d7b2b5944bd8f0e6ee4d772cd679191db590acd0bf55482dc4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMLXE1330400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe2557a8b7ee095f455f6b5e7fd8679ca346b07e53cab6fe19cfef4666f3d01. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QMLXE1330402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b433643982ef734dd84c722101d8d8ffd8eb40121d80d8fc7ad49258aa63e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:38Z), 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/QMLXE1330404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6f5226ca4bb6adfbeff5771ba88924fa2eb8564faf25d42b2b22af3c97075. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:05Z), 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/QMLXE1330406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e80bf9c8c7ac96cc12fc47e29c5c4dcb0ba182e4071c1a89fd80f7f2391950. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:02Z), 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/QMLXE1330411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ac7988771e9eb27e6a622829d332400835a198651017fdb7cf155eaae4e388. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:25Z), 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/QMLXE1330436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7832f91bbea9d3d0b5aeba65bebafcbfdd9719d3249663f4050377dd0cdeae. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QMLXE1330439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d3056a0ea6d775fed6fc5bd5efdad793cb028bf17f5d82fe8796cb16585ea. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QMLXE1330440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb81a0827c92e1c1a25b43c7af812d17080624912f8ee5c973338e70da9b534. 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/QMLXE1330445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca2eff7d377835db41ad15b4b280fbe72c2fbce80611c656fbbe4d1f879224e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMLXE1330446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e73a0d7f98b354c2de2d2d43ff27ffdea8683110f1c60d781b6b5522a9c4e6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QMLXE1330415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37573dc914e227171c8dc0c1f1c11534e38d70ef05641a46569325576e723944. 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/QMLXE1330418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817c1ff09a030d53a6b193fff1c4e09426d36e59dcc8ce7b93511a6313935432. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QMLXE1330420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516c4a9c7832d73279cec43f6d29ff4e4759926995a9d0451234cb77fc49a8a0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QMLXE1330422.