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 0x04668ba80bbdf76aa4c6201c898a5d7da3a63df97a86469586f007ddf6c566eb. 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/1252f504-4ba7-40c6-a983-9bb9d7250487.json and https://artists.proofprofile.net/proofs/artist/1252f504-4ba7-40c6-a983-9bb9d7250487.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 0x5963b637840d01e1d90440c48e943e7f695446e6850be200a679150886db0696. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRKO12300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34c118e41cc08bc7b165939eb06c746a74102ad404302606c50e5a308804702. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKWS2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bde394fa3c15101580633b668c9549c582573c58e9f200223f343146d8e902. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBRKQ2273409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca78ced166c44390d777199bbd1e34e7619c69015be0b0675291aef6b24f0855. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBWUL2282868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c377b0b605442748158767005474573441b2d9d31ac117b00737f28accec5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBWUL2282876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079783a1017d8b42a97a9e08234ecd9b9a56581a5acaec1ad8bb7268e022e476. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXQZW2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65b48059a11460e332532168225db4b730a4a869860746fd5be34a224323e7f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXQZW2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eff94f686cdf52439a35ec72a24c8c88c2039e356510b87f802b15afff8e87. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2442056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb7d5546674ed5564fb56a48aa85f8fb66ab069d3902cb46e3b1e8b429aa02f. 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/BXQZW2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5323e178a15b97eb8dbb36d35dfe9a6fc429781c015dce664c50492556b8435c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXQZW2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e04518ba1e6bcc3450744d23d817b3850bdd2eb1d79c33efed47f119c67609. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXQZW2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a544c1c8fb18a31dd839b2548f446af4f6f9609539fc4604e34a282701ad8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXQZW2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d452d29a535e8bb923ba089153b419d3099ebf48b628f1707e3722698e0dcd1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXQZW2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf835b234a4a58cf5ba25aa8f32aa48475e7bf98154d4532130164d604798b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXQZW2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac20257cf95a4d75ba1174668cf247da42f3878c701ae8043d708a42d28435e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXQZW2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaa743effcb48aa1602eefa98d212b1f421ae9bb6335826d8f3fb80aeccbef3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXQZW2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dbcf52783754436c57f74551c9d4947fe1633856b6e3592e7f9bacb9583ef7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXQZW2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d2dd90deec5e4fa6d603f5a2d3004e2f3912427735a859a1f61a678e80300c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae09e4b19cd05734da056442558f12414ca21969ac1e007bfd3b0f9c8fc66d5. 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/BRKO12300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e733af2cac0288dd758b834eebe18952e722c4da6f85fdd18278bbfc21a46b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRKO12300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf946d73fef45b5ad8d1e39d2a15ba283cf7ef101de868f5412fb77fdb0c6cf80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ddefa35105288a90c313a74df3fe0a496e6ebfef5fec259ed0c510da3ea08b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ef7361b1667c7f27e7d89efa47adf40c797e40b623be3df9616777816e1e24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67b0dd896e9af4bca244db7df1a8e1b42e6d1bfe65abfb3b7b172e8a27b1442. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54a2126c3a94dde78dc31fd67ecd2a396ab7587abc6c1168661c298a647282. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa28e4e837239cca168d92179ceb8f3928625e072ef5a4e8d3f4690de4f670e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKWS2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc6baae2354f64c78e336827d2636f82bccb2b655267bc89cb92cf74e0ccce0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKWS2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277edafbc7b9d0e23288aa32ab98a1a3e6a874424a4f8b3b47b699b49276650f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4A92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afbadea728621806683c20aa8e1083821dd6661485f5c42c31005a3e4cf4fed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4A92500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ed6930ada6d084579a5e4856db5ad0116698206367a4e614c6e4b412edead3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4A92500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b8b2bbb0f55fa0776d072716619c0900f593b05a5e27dd36e5ed0ab59641c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4A92500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1cc8924135cd5a5ccd9e2e9334d6427de770046114a84cb59bb46d6394506. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4A92500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c77d352ffe2ef0dd749405503b64723aa56e9726a9b8e560397d6dc724910b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ32105773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e232a0a68d8e519c7aca65b0b7122b081173cee00ad96b704e2af66f1ec0f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92047618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e77e84a74c883c858525b6c243c555272182cfac0aad7cfdcadc5a7d91288. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX9ZT2500121.