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 0xd916e702dfd9926a36c1363e15edf019c6e944fad4661bac1c7ffc96d144e93b. 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/94ac1f3d-0e1b-406e-8796-74549c76a833.json and https://artists.proofprofile.net/proofs/artist/94ac1f3d-0e1b-406e-8796-74549c76a833.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 0xdff2f6f86ddabcada355ff335802a523fdb8eb4df788924a487db95703655fc0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ2324022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a0cd00e7e953886be591149aaca6615a244298dac4f7ec662280d095cbf18. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:20Z), 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/USCGJ2394372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ced2db29cf8a7fd49279d40935b99d1fab1eced07314b03312aea9690c65eca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4Q2375976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851197e9cc5270d0fbab52da72a7d403c4c5715ff24898ec80117156cfb5c820. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH2489327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0aed9e2c39b7ae88114a5c92481c9a6d7da2b3360a2291df91142cd835da79. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USY242426483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20dfbc2ec5f2efc2d16c1095810882149eec3e1d5e4012cbf5d717a6b134993. 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/USCGJ2585786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300242fc8be1a959e72ebe06e1ce902e7e2bf04b11cfcb20856512a0047d811b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEUD42563511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feff986e950cd9333c1086d1aa1c22f3ed0ce1af9b2d8ed2a9238e9e3aae48b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEUD42563501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497995e2615af55fbd8f6673b4cfd50bc5c68e6d5335336dd9d71f84ee5cc55. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEUD42563503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa894dbe1e29f6b7282d849105841f56959b1e022689d5747f9afe68cc06f105. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEUD42563884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e7de7ecf043ba4024d3550f97acb51edec0be7fef6d8172fb34d829265ec81. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEUD42563881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e669c9ec645dd75d0f06fea7544ae1f100be30356488be4a26c04ee9322fac6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEUD42563894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab514c6b75b9a9911ba3607098b267abd15120072b5a6fc248b93dde569ec13. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEUD42563880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cfab09f7b38588649069de4d1d22823df678ffa4062898394bc40b410c7474. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DEUD42563888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa648b7e2960aa7c0eb1475a8ca78511b2660b141f299c0c7cef95e54c56fee25. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEUD42563887.