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 0x5c797c126ef3045a3087909df22dc2ae5a8f450f4a73dca644043ae8c331ff51. 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/777a6f7c-41ac-4839-a96a-9296390f46fe.json and https://artists.proofprofile.net/proofs/artist/777a6f7c-41ac-4839-a96a-9296390f46fe.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 0x4bfe5a4ecdb6c4873f51a843e8c23456ebe91aa105ba0d037d451315c095fc95. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMBZ92025747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9611a4d112fc60bada16835c3723e1e0bd00f02cafa6ce7e50ee312beceb38. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:28Z), 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/QMBZ92025748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd75ce232f08126cced0a43ffd384a6f51b8c24b8d2b11936422f0b94ac4b98. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:20:47Z), 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/QMBZ92025757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aebc0037ea7360eaaf8988697bfe2b2626e9f1ff299f45fabecb74c35a05071. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QMBZ92025759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f25a7a5010fb0d75ae615d5a8959de671b3a659986870e1db669dbc5e9f955b. 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/DGA082290316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d190b85607d565de4f309e0de7ad514b4d3302bd4cac4ef708bed7450c97d62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2320979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef99ab992fc0e2225cb9e43b44af929b84c0e52c041dce03db8c6095df471f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2320980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dbe66cdc345c9f7c0c255a93b3deb38356dcdf8aea76976db864fc4e28133f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9L2327769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394bc082b63c89346bfb723966e863132c306e55178096bd1b451699ee4a86bd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZW9L2327771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed19891d09fd33f979d90a18f8106cf8cc4752a27f7dd32621f98fbc37f990ef. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZW9L2327773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d824eccc64eceee55dd651f64e728f8afe3576aa086305f90888365ddda18a1. 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/GXHAF2527456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d061da11954d4f46ca47e9c21abf16bd292549594751ad1438e4217328dbb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXHAF2527460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7effaf84492b186cc991cb5196cee957366e154129878b1d94a016577578eb6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJY2102713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e66220020c670938df9c9662feb93f964df07580d71dc82e6283b2f99d48596. 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/QZNJZ2384587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c666472c934721de9ad37f44d7228c7121e798a204eb13a90992f8dc795a05. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTVI12400621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d183c6472fb8ad63d0b8fd69b689d07c984ac351021bb61df262b6bfb92a3db. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G2244887.