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 0xbbb9f8b2c67871b21ba95d6da2071ab4077baf633dbab91e43dcf6aa2cf65089. 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/bd6e7811-f3ae-4bfd-a574-cf16ba5be404.json and https://artists.proofprofile.net/proofs/artist/bd6e7811-f3ae-4bfd-a574-cf16ba5be404.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 0x4d9d3b5ff0a3c393c69f4f6a05b27eaa17fa987f2349dfa5d52ba4a2293a8906. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBHLW1902755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0925affe9c790eea12edb2aaa8eef021eae57eea01d3a102a0ba4b0dd6905282. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBHLW1902763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ede2e06baed6a5837bd498aae2a19205464933df9f67c8f2d45891e15feac57. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UGA262200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57283c86d9601ed9bef062f4da048c793895cef7525cafaa942224b11be496ac. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/UGA262200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26a5a4a58ed8f090f8a296049a19bc71b0d95eff630e5e82baf4a69982953b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:45Z), 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/UGA262200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad605feee8ed79330bba6485ee3c96593a8117e1acd623564cae51aad06fdcf. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/UGA262101327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9290dde41ae86b5288dd82e79ec3b8dded53e0d65941c77532cd2f8994d4f0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/UGA262101324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cd68c5d280bd96694e000a3312aa0768414e881ff46a1fb38e5eb232c01713. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UGA262101325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164944fbc475bd39ae4e18186270e289914028985a03d8675c2885c54e457a45. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UGA262101326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad605feee8ed79330bba6485ee3c96593a8117e1acd623564cae51aad06fdcf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UGA262101327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0811aeae074c5bb3dbc23ba4be4a181d425aadeaca828424a4e3f51374904cc. 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/UGA262101328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5d9131e403625794ad18a41fa3cf4de8eff4d2c660fda5fcc502f9cddaad7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/UGA262101329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8232923fa5c578974b875a3f1f954079e0517169128d31385aa306f7a635c7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UGA262101330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c001a83694ac6965bacddf090f60b11ae1c3aa9b566a8dcc775b2ada095f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UGA262101332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740fe81e9e3f70003a46b25b176d4fd65cc1fc0bc8ba5ad9867a8c6e632f5f0a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXF2R2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8430354940c7469d22104396a663aab12ce853bb76cb6b165d15d08e1de7fa8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMTD2100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8430354940c7469d22104396a663aab12ce853bb76cb6b165d15d08e1de7fa8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USMTD2100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24898c411dfad3436ccc79726c87009bff935d5a1cca5b218e16281a519bbdc1. 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/UK2SX2412011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a16b69a1f191a033c247a264a3bc3f9c24fa5e73427bdd1538147b117646a. 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/UK2SX2412012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d68a09603a2044e421a683920b53d2c14c52a07fb4977eec6cccebb1a1c863. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEG932400615.
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