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 0xd9811f8f8248c15f58e0846f5bea4b0f19ae9e0a3a4c4a011f59d8246a15b25a. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dddcaace-0907-4496-bbca-8148c40bf7a7.json and https://artists.proofprofile.net/proofs/artist/dddcaace-0907-4496-bbca-8148c40bf7a7.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 0x69aeb07db6839db47be09e2caf8d74e50544841be5dbd93ab1b50b86d62ac56b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHT2453308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d69cc4d17c0a5523d58da19fb5166010ddf01470225b7fb73c41ee5bf773757. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:19:53Z), 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/TCAHT2453335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbfe7e0ce53120c084822dd6ebadb4a1be56931969582516bb691fd7f6a2ffa. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAHT2453340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3959893b72d60c7487adccedf27449f52cc95a6280d6a67d589336de53ae8e0b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:18Z), 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/TCAHC2378202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4e4a0f5f008706a8395a71de9adc820b938c5f44964f852beac4848c8f1840. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHC2378213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2fb37a41323a556817cbdbbecb0d943bc2aeb01bf8c15757e16e64d1456c7. 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/TCAHC2378227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba1dd37555f0a07984ddb1b5347886c57aadcc75ade54c667de0fe4e9e9235. 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/TCAHC2378234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89c1b9f08f5fd980081f9a52620c464bed720b7f2882f1f2000f23fed073206. 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/TCAHC2378262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db573a99382a643de961bf446279bac1632f58e041935afb9f3a632f1708cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHC2378276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c24309e6c29260b14cc50bc341d2679bdb7d2f986cdfda7891fb0cc973044a. 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/TCAHC2378277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e75e2b746170f99817ecd8d44ac2633b2c8f7e9e137abfef17bce090b217e5. 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/TCAHC2378282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e8f9bc9d91da8c27438a2f8220c396151d50c0615bfe3231dee37114e34df. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4R2205051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86057bf26c0ed995304c2b8b522a2a6f83125113ff6b0496a522b222f93c856f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2205052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816b5ecf1dcd154b27f9bbab5f3dfbe91ebbb9293d7902fe89e61a019e7ce35f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USL4R2205053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73ab9b55eff5fb4d5d7b30da0d9454734af294dc8b28a45b05c4fb21c891375. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USL4R2205054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794eea42c0306e41a4dc7c2e877c09d600ed6bca0f0eeedea1bd2c6003c2f417. 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/USL4R2205055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e7e5ffaa58c747ed3ea3d99d83b22c3c2bf2290c415184e78adb21ada6c793. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USL4R2205056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823154dbea0df01579c34e492a628883cf684b9f5e2d151d92e68a941e4d1831. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:15Z), 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/USL4R2205057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2ce20ffe80078a73e50393ea90034c842cb60f201311c7b6ce388d3888a03. 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/USL4R2205058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a66841c6405db162a2d4ff905a31ce97e8e17a25482b1d11a48de546252a9cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2205059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ccbebf533ce1799ee679534230beb052980162e56ce048255132e60de07cd. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USL4R2205060.