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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 0x57e1ef00cd5a0a7d5f5ec172e3431442de485ee5edaf94f1693c0f35165b6c77. 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/5fe437c7-57fe-4d93-970e-4aaab067b8c0.json and https://artists.proofprofile.net/proofs/artist/5fe437c7-57fe-4d93-970e-4aaab067b8c0.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 0x9ae68f333a00d442fcdbcdfd3d00164b782cc9a8eea15bcd540f0fd1e57f1258. 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/NLYK92300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe70300fdb77ee03f757282d344678b0ecb01bc5485377e00c395a6216e2c698. 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/NLYK92300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b7c071ee37212eae90e82b5bb5d987a35252e2a11fbdc89324b14314fbea95. 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/NLYK92300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67aaff983f89616c7648bcb6743fb51d150286ee81c1dc2be9dc3acdf584444. 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/NLYK92300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92de16023aa4542576ee38e9bd0c6c8e2b04f269e02ab027929f7edc436b2817. 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/NLYK92400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd58110c588d4b232203acb5108360806447ca227a5a3f9757429a9b6eda211e. 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/NLYK92300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081bd352a3348235c53d6a2ca8ac1f5d10c1911a44b1919e633e6ab3fd1e2cd3. 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/NLYK92300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62208fe7eb58f5eb3631d99da55f48d348770d7577888050282738dd4873edc8. 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/NLYK92300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5805ae8e77f19ae48dd74fe0085a33010b8248c4f8b8f821b5224c72f8e5e57. 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/NLYK92300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ec68bcdab7d87ffc38a7efa1d6470194f067dcdef4b9adf65e3a8ca7ad990. 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/NLYK92400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498a20b050b20fa34237ede626d1b2e71cd089d5ae6be3451c7ee149fb328fea. 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/NLYK92400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cde3e9627bc2c6befca7b889cba338446c4653361725b472bb51df1e90c205b. 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/DK4YA2400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c7f9635e2c7a18509a9082bb1b7d015e33bce5b609cb73930224a4fde570b. 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/NLYK92400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec59f0a0fbcd4de48b18fdedaf562f2dbf555e47fdd5bd7b38396351692b9f91. 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/DK4YA2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aad9738bd1843c1bef60466a0ad60374be613a4fbf24c9bbb50c77a245877e5. 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/NLYK92400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a3879bbb3dbd3f5c3f84394fbadcf9e99e7e3749e30659b497ea7271ab9b6c. 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/NLYK92300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09db911f22b6b1a2c43334f7e47dfae658843b57b7f73f798022be8385286cd. 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/NLYK92300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785bd19618ff3c2a1a630bfe0e9be3e59d1e080dc6b988cd2020c662d12f6ac. 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/NLYK92300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3898bf7c5a12a7af76a7be10c3e2c25c140b7aa7ecd7952a2cc3cf82e7e7162a. 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/NLYK92300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b20c4f5a75dca6528238105dc7ff7f66bae76b5da1419f4cac4a588f84f3a8. 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/NLYK92300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeed2a618626ad16551e7ddfb39c3cc6b114fa804c770f72c2e29376654b112. 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/NLYK92300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8206f0dd0aeb958b3f514e64351d0f13b05de23e2db8319e10ef59248c7652d. 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/NLYK92300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2d8731e3e635bb593eba4e40a5f6ac53f405811e5a5e4dd3e7e288106cafd3. 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/NLYK92300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41136f687763f40f0f10193205fbccd123fb3c02e1d5684e689b3ab59efec206. 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/NLYK92300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9768df7d018a0d39e2c4b1f4b6527d9df5672f77f73555d83f78ceab7594e097. 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/NLYK92300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dba0c4692663b0b62b37c44a5b80608a5586e2439913af6f73295239a5b8a1. 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/NLYK92300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938d2220efa897e6d8740226e4c62ca352531943078ef5369242c094d036b193. 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/NLYK92300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7973ec3daa90f4f5921fcc30d3f477c73b710663bc51d36138b12fe7ee8d2d. 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/NLYK92300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1261af50e6786e470968019d13c9e68d327ccb418387f5615b3afaf05d4ef1. 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/NLYK92200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1261af50e6786e470968019d13c9e68d327ccb418387f5615b3afaf05d4ef1. 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/NLYK92200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7973ec3daa90f4f5921fcc30d3f477c73b710663bc51d36138b12fe7ee8d2d. 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/NLYK92300028.