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 0x2a29d2f2352304944f4d9265888bec171faaa5374c272c3e47d4cb096dcef453. 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/88fa70d4-f207-463f-902d-11fbc1dc65ff.json and https://artists.proofprofile.net/proofs/artist/88fa70d4-f207-463f-902d-11fbc1dc65ff.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 0x7618ea38ffdd7d285384bc007f82566db84963060a5f7a311b184432583c1948. 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/QZVEM2366987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1d58944768d2ea8d8273320ba3b2f48584bf96d5a2436bb1c335689f248e93. 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/QZVEM2317995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ccbd248a8b77c162a16709875c98c1b6b29f28a1ab3cdcbbb40638edbfcc3. 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/QZVEM2366988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc09a1e109e7705c4ec7a6000e49171ea29c102d9c7f7a30f9842ec680634825. 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/QZVEM2366989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fbdc12a351c12375dc331f8da54972cfa3837b2cf81323169f1de2dc54ef01. 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/QZVEM2366990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861e0c87677d7a55929745b794ebe072d9e18c1fa3f6a58e4a9a740b141aedd3. 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/QZVEM2366991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26909c2e76088c7341417e0668ac4d331c9f2e27db15a415c017f19f4c212903. 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/QZVEM2366992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4c50ed8cdd141a9f5c289e0e2aa9f87cac2450f9d1ebe8670adb3e5cf9833. 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/TLREW2223242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85d80e244909befbe9747fe3cee55630d5c6aefa4c888eaefdce04bff8160b9. 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/QZVEM2366993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3bfea97dff078e234a82d6135625f2591ce0e3fb4afad07b320032160cb1aa. 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/QZVEM2366994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64513ed314deb72e8d90321769c2f10d2c27d2a7ad1379fd021da1490e4e1df. 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/QZVEM2366995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d430f297d8e7a1082198a970693d174840470e03e1e5a532cec95b56b690a. 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/QZFYY2296744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f15bbe62a2825c6e8cd0d7dd79459edbd2c0bb8a7f73d321983dae274b6f660. 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/QZFYY2296745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6ebf0f1b10f81864aed791a025957096739f6761fae555228f5d843e4ac61. 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/QZFYY2296746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c56b3c4d8d2809e3b47ac1ccff668c1e71c27f4c2c54f87ab2dc9b6a292c52. 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/QZFYY2296747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8735ff8129342def98c7dead2f76cda247bdd2edb96adcdf165151a3fa4f89fd. 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/QZFYY2296748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550a94e7b5c4e9a10730c4f7abebec73adc164d66b3c647076d3a70e07b1b0d. 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/QZFYY2296749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101ae90b16a6bda49bb27b473abe1a109b05ca5f4c0ceb2981d8a5fbd1283bf7. 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/QZFYY2296750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea71efab1733df150bc03100c74ad2e972130c59cf7108e867bc8425fbee04e3. 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/QZFYY2296751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede4f2550ec2169f592e1d5d0d8bb244370519b432980cc5fa6cafc77c6fba8. 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/QZMER2165981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c1be6c3d7128474b9184fe603445a585e1ae213032b32be3522509aaff59d1. 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/QZFYY2296752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc573bef3589b93bbe29efb21e6e63f420dbfc23a3e9f8d0d0db4a6bf2cb9feb0. 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/QZFYY2296753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc00202e0fca35fad716b277ffa5f3198b8114f7fbeacc6f2b79bb640f22b73. 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/QZFYY2296754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2327c0ebd0de3ff4212efa6dc6def64b7f81cb6047d0c8a33985c1d1ae70fdc8. 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/QZFYY2296755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6ce1fbb8e8bd538ad5fa9f690d6f6cd9e94e3dff70100cb60cb54681d7277. 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/TLREW2227880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4c50ed8cdd141a9f5c289e0e2aa9f87cac2450f9d1ebe8670adb3e5cf9833. 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/TLREW2223242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9fb565d6b5a791a57dbcf65b03fa54ec5104af833ce68693e676ed0d7099be. 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/QZNMT2274784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4365fb0e9d26888f5726b5e651dd98a63a2884644cb3bb12902bdd216afd3a. 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/QZVEM2317565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7daa6a67909b69401e99befafccdb635abbd5a1119e937c3e25fa233c9bfeb. 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/QZNMT2274785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e80d650987434ffe1dcf4c45f55e98893333462cc56296d0716ca95ef45447. 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/QZNMT2274786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada4bcb93a0f17718946714ead63602cdd985651f043fddb7155046a9e56eabb. 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/QZNMT2274787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c0121b972f9be183d4662683f6e1c925ddb3074a5018b774715ae0ae19a2c6. 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/QZNB82212091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede4f2550ec2169f592e1d5d0d8bb244370519b432980cc5fa6cafc77c6fba8. 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/QZMER2165981.