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 0xf705cc9081524fbb776c7d8fdc4879862421c5093a138bb4fb433ca498bb46ca. 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/f2097346-b776-4bac-ae08-bd7ef72e54eb.json and https://artists.proofprofile.net/proofs/artist/f2097346-b776-4bac-ae08-bd7ef72e54eb.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 0x80c0a232ca0f3e91f6d01fc57465794b6361f1544d7c8f9ee6d305dd92f2089c. 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/SE5AJ2201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796034038fec083b5096546f7f08e91cc1350ecbe873562cad171a510a22cfac. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/SE5AJ2202245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d0d69bd22ea16ca71f11693c7e1ae9044ed7bd756b5ab51c7a7e4b43a2ddf8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/SE5AJ2202244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4a5a98d3bfcde07b9cf2a072387d0a94586af37bc23286d31f0afebef6f3f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SE5AJ2202275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16a1d8d06fada7452523772b1031f660a779d71c85e11d1e4608a93c95d0d6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5AJ2202341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818791fe663c490b17d48ecad2ec9dadec345e0bcec684767677cb3ec550ae98. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SE5AJ2202338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced1299fdce4929a2a8a8916b812802423912ac57015553e2ba74e2be34105a6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE5AJ2202339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5175ad1a7a7db955328f220ee5edefbc52a34fab614b7e968c52ed31de2b8c88. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SE5AJ2202464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16a1d8d06fada7452523772b1031f660a779d71c85e11d1e4608a93c95d0d6. 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/SE5AJ2202341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c14811477f947041d067b6f914deb3e7de097d08df0866147a16fc07b02d933. 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/SE5AJ2202246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4a5a98d3bfcde07b9cf2a072387d0a94586af37bc23286d31f0afebef6f3f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE5AJ2202275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82272adadbce01c16452b84aa7d57dfbd7314a407ab6736d184646a44461cff4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5AJ2201967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a79f15edaa3951080d64d3edc3f712923dfde530101daad2ca014467d2d467. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE5AJ2201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c0a232ca0f3e91f6d01fc57465794b6361f1544d7c8f9ee6d305dd92f2089c. 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/SE5AJ2201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d3f881598d5949870fcd2bc0f2c6bb11090f5070e5debd42a35e9c0176070a. 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/SE5AJ2201970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e081ff7cdb9584cc5a87f42fdbf6a5e9c906efb63f09e85ae2f543f0256a3cc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SE5AJ2201971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7fa7109231df4a4e024c10c49f32fb00cdb61a4d8bbba98d3da1b858c03006. 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/SE5AJ2202342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818791fe663c490b17d48ecad2ec9dadec345e0bcec684767677cb3ec550ae98. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5AJ2202338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002f8ebd1cb1b6790c0085f1c487e756a205ec3fa30b7485f5b68047aba2ece. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE5AJ2202462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced1299fdce4929a2a8a8916b812802423912ac57015553e2ba74e2be34105a6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5AJ2202339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf99fc8a87fa1bc77b818fd1b2860775c7e4471f1e1ac6b5433d66e85d0fe6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5AJ2202463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78830669731ae86e6b460397bf4f0c95ffc333db9874de1f68013c9ee37bc6ff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5AJ2202340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16a1d8d06fada7452523772b1031f660a779d71c85e11d1e4608a93c95d0d6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5AJ2202341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c14811477f947041d067b6f914deb3e7de097d08df0866147a16fc07b02d933. 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/SE5AJ2202246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796034038fec083b5096546f7f08e91cc1350ecbe873562cad171a510a22cfac. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SE5AJ2202245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd55ea6da5b7abb694343cc87ae338ba5f65989507e92507418f7bba2067e471. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5AJ2202468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d0d69bd22ea16ca71f11693c7e1ae9044ed7bd756b5ab51c7a7e4b43a2ddf8. 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/SE5AJ2202244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4a5a98d3bfcde07b9cf2a072387d0a94586af37bc23286d31f0afebef6f3f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE5AJ2202275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a79f15edaa3951080d64d3edc3f712923dfde530101daad2ca014467d2d467. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/SE5AJ2201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c0a232ca0f3e91f6d01fc57465794b6361f1544d7c8f9ee6d305dd92f2089c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5AJ2201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d3f881598d5949870fcd2bc0f2c6bb11090f5070e5debd42a35e9c0176070a. 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/SE5AJ2201970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e081ff7cdb9584cc5a87f42fdbf6a5e9c906efb63f09e85ae2f543f0256a3cc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SE5AJ2201971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7fa7109231df4a4e024c10c49f32fb00cdb61a4d8bbba98d3da1b858c03006. 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/SE5AJ2202342.