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 0x7c27aabb23949766f45a9d05aabd500afae46cef2954d9bf9e457f1f73e2e40b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/755e3adf-c0c5-48c0-9e82-ae0d390784b0.json and https://artists.proofprofile.net/proofs/artist/755e3adf-c0c5-48c0-9e82-ae0d390784b0.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 0xcdb1b826ebb3de70cacb11f0beb655aef5695374c309ec2ea1429ea46eafd017. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:39:22Z), 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/GBSMU4251895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96403adfc742d07b900d6926f00a6f23c6ab8cf455c015c445abc40145e91e1c. 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/GBSMU4245486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc413aa218947cb4ec5af595c81d1c0a58ce9e3e63b0bc73feede51037e87919. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/GBSMU4673492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660548636836189a121f3b6028f1dd16621f0725a2d9d47fc85d9b0c7d66b122. 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/GBSMU7088397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063afa9f33f0d14961e6fb3092a51817cb5ff05d7e088f42cfb531f723b9abcc. 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/GBSMU7088412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400fc974ba9f83b741720b436845e3b017cf8fcbd865da5e1aabc80f6652af32. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/US7VG2286678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0f41e3e43908969def7ff4e827d484d5784152839fbcd6f71c70cc65c713b. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GX5MY2241715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc667b1e9b17fb3cc6bbd26a68d52838f2a2e32695db47f3d14c3117d815c5a1. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GX8LD2308249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa04d42dde4da178f71b0ced4588a4030b465e7b5f388393bc4d6659a157330. 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/GXBDS2315576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1c96b5574facfc7e5a6a534e9a17b34dd2cfcc7e6e3a83a2c310e64e075897. 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/GX89G2499957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c9f29a226bb24e1de7d4746c69c9e3da51748ab1af77fba4ccc77acfafe96f. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/GX8LD2404572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065ddbede7ecfd8ee6a2e2c4b9cbef618a433574554cf105ff97aabc299a448b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:57Z), 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/GX8LD2417542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee0682d31074fe7249661c9cf67093a4651135da3b885b7be2206bf635c9dcf. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:15Z), 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/GX8LD2408133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8308a1e009bdd7e59eed876c4efc64e99b87cd6f79665d565a27aa59d91f9ec. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GX8LE2472163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b9a9fb6f35945cf9c51874f05d02bedf92a28515351151195d3e0d7bb62fbc. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GX8LE2476194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16a4eebbac7808b24a8ed16eefce436aa5fb51cf294e5ea6863bc141b61a214. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GXFHP2470544.