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 0x74b5929800b68b69593f9dcfb2bc61a2138694aa3aee2d84a299b1bb642dcd5b. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a385c14c-8aa7-47fe-a18c-7b4ee1abdcfa.json and https://artists.proofprofile.net/proofs/artist/a385c14c-8aa7-47fe-a18c-7b4ee1abdcfa.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 0x286e4d4afd5f73ab2c325dcc7f7fc82e667ce9baf27b7d5207c685129c05568d. 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/UKACT1842911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c76eadd1d9ccee54d2e3f469df1e7908891f91c1b6307bda5fd3fa7a9245f8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/UKACT1940461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f7cc8798b59da96359859605a612f51e0396205d5329ed90ab44987d9b2207. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T11:57:47Z), 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/MX2832470610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dc4c022445c2076deb35b93e16c48d74a2737e11f9c95f4f627063ff8d3c0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:26:15Z), 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/MX2832470611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8608e11e1b7da50fbe8d04f45ac9b29a64577f5caff22b12d8632380a8d4795a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/MX2832470612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39028ac296a0ebaa7cf427255e0795221182ea202db0e16a2faf76244efae518. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MX2832470614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d36983b2239f982da298b0ce8431f7eba096c4033f9d5da9666ca889554687. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/MX2832470615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af9e70f7a3a372215e5cf0e148cc611b42e0f96877a61a4d3ddf98ea4036e9b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MX2832470616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77049b920fc0839f3521a40dd3b18868a803544accea536db69b67026791dda1. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:55Z), 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/MX2832470617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f705b0f7f741ccd55fdaae18de3fdb8e4f37f4021b50f26641932079cc579f0. 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/MX2832470618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60672a87b3982a3a4f465edeee242a7397ef14703f35b0182faa670f8528fc7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:14:26Z), 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/MX2832470619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28355c651e8500d68ccd1986eb4b55899c79b467cd8b383a7af30d679a958098. 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/MX2832474566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7dd7a824ac87c603e073fddde408036c90f6078fcc8e028c38aeeefac8e309. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MX2832474565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca81e9038e94661e0665785ee819496de727802452cec9de6eb9af2de720ce7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/MX2832474567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618c7b5edc0ca1a7cb055caa548397d86cb11d1d79417419b21bfae705784017. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:17:55Z), 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/MX2832474568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adcb9d4cf3dfb87dcbfdf733f7233264ee3e1770679239d818b1142375ab27f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MX2832474569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a946415913ba5fac0b9bb4485d7bce71d70ccee844e9a6e8a81660bf77edd7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:03Z), 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/MX2832474570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13a8ba5c17081db934e626ab1ef78d33ded42140572bb86ee71d7068aba0c3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/MX2832474571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa92a5220091c8230d01a10d5e18c8db97b14c549278fb38afedc97a22d75bc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:36:32Z), 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/MX2832474572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd335abd60bc89610e6e41ba73954d7220bcf44bded64b84e95c3340b4f27fbb4. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/MX2832474573.