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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc11a96f4ab0e11732ab58c5256cb85bf3032f95ffcfe7936920c2968af926c. 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/adb4cfd0-c0a7-4f7b-8c17-7ad008ab81ed.json and https://artists.proofprofile.net/proofs/artist/adb4cfd0-c0a7-4f7b-8c17-7ad008ab81ed.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3de081a286178f83ed5ec2d04ea645aa06b9ece55bcb4e10ec6ab3aff2fd63c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX762487332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cea9dcf048fd07fcbf06ed79bf844b2ab51904cfff44ddf3d543ad6b4e30ee. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX762487333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaf5e308f4bda16b586032d8410296c4eedf0337549d40526f3efb1594ddd01. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762487334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be5dcbb544be986335d1fa11b609fe6c18b417bc743ef373b70b621369a537. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRX762487335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda2eda002e9a871a8e6932cfe0d83ae1acab532359c3a711aadfe66f60c1996. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRX762487336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6359b8dc29c857ff90350530206448c9143fb1fd9d8890f6cc87962448ff1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKZGC2300981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7011fe5333cecbbf3a4f92678b42e7608046b78b8c256a1042243edb4373a9. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USANG2223293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63073bb9f8400820a25fbe4c57c63736047700fbca07737a0e0e03f5a09d120. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/UKZGC2406173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952122551b77cad283d4ab909e5364e37bf583a32ea9513ec98f2fcbcc616367. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2286539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5334f5da2487121b4bd6928813ac2933b5e706976fc02bf796d71cbc2c037980. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2306613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec67fef5dc79b81d35dd59d12611f29b7ea71ffb6701b65e6c9482be3beb14. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2305946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18cbfd91caadba585473cb6c68a3b1e317659241d7fc17be9fb844557cd0208. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2305947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19cdb7a0838efcda007585574e32df4f20685ef3d4b008396a6dd4664177bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2305948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d859b93ed033184339650043d49f3c4f241e5be5f7a5956b27b9d6530f78db5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2305949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6f8426ab09f6f5bcda0653c06c4d0932959c1c8adfdc919ba15044002566f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2305950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ccfc1f17203e7dc8438355bfe1c85adbd62fd2d1c529514e2f4e9a8bddd952. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2305951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb906a123d61c10a37fd92a40ca01876b6fbe03ab628faf9e8a44eb262519f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2305952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7c956f424a538eba28c7aad51141d1a49c8934f78fe32b17db504aed4ffa96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2305953.