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 0x1f74303cbcfcee0244d3122756bf03db2fdecdeb3a86ea74ef838354bbc09a76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1203599-8a3a-4dec-9bf9-ca1530c05d2c.json and https://artists.proofprofile.net/proofs/artist/a1203599-8a3a-4dec-9bf9-ca1530c05d2c.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 0x4ae80868a30c8c77115d13c0e4ba3e864c4c9afde65b1f2e5bb1c0453be9eb98. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:11:26Z), 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/FR9W12403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d0f8ef1f9966fb11fa930864e63f8cb4095b6b0d66a872eea258fe82ba442. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9W12505401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bbeb60a0a81ec428aa071ec06959c70f2c2266b4d5a35a2bda0d31d36f3409. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:15Z), 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/FR9W12506786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ebbb27a4c6e62f3ad7b7baa6e428315e1c111b692f4ef23d241ae35b87b91. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR9W12500548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244fc183b9273b70efd34ef70fb94c15de3108ab3dd11deaf6a467462a572c54. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:27Z), 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/FR9W12507986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16a9fb2f3ef112fc06f58a1659e92a85ebad7d91be2e12711dea45b0782842. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR9W12507006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c8bfe1328253485970ddc340314e5cad3963afdb02d638f91e1a30d914e9c. 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/FR9W12323315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe42246cc5b21a30d59e13f3dd58e4be48dc6bc7bcb5fb5f140fd7503f82904. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FR9W12331471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19de4160b76eb6a62c841fc724b5a8d45c0c030bc234a951a970e3adf2063fcd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ee71f24f5a8a90aef74c46c6ed2ad142b2cee1030ab4ae93f52d8b36ac04ea. 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/FR9W12300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19de4160b76eb6a62c841fc724b5a8d45c0c030bc234a951a970e3adf2063fcd. 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/FR9W12300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1063c21cb7e21585dfb68684f9fb6e0ff1dcf116efaf0980d9f4e95f6552c390. 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/FR9W12300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f3c204ce154f27dd9a73efd3a94949cddf372d5ad6b12942555f2313895873. 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/FR9W12300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203a43834f7e800303738364d2f1798940f3d4a4a34dd85d8f91f0bf64db45b. 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/FR9W12300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb4c0fedbbdeb00bfaba456d99d43ae37cbe1016c4751243ca9b494402d6e6. 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/FR9W12300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce01c148eac6c6492cdce982e4bd58bc3ea6ac244f86ed96810a350fd0529e20. 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/FR9W12300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3593d707519844812a1f1d04c9bcbd69a46279d80304750e1dec1d81771dee97. 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/FR9W12300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19dc492aaeff4e0acb0a18610b96f4c4f9b78db6ce0bffa27797b5ffac31cd9. 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/FR96X1894395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd86a84988b00a103678e9d716827ac58e17f790a671f639bfacc1cecdb43c. 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/FR96X1894396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605d2bea6777c4cdf6c333b0fa86f0de5b06785e895d0d428e877f02246552bb. 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/FR96X1894397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bdf3641dd424a12768e4aecb7be134a83b03afac60c9ea836bccf2ecbb1db. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR9W12339074.
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 0x66f70e02207f2307cfca8f6df8e9b222c96f66be4e21cbf7f9429c4491a673d4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR9W12300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158414674cd6f69e2495440aa4fe27d72e669204bd7acbbabe54bb86531ce4cd. 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/FR9W12300029.