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 0xd2fd0335de0889e9931987a880072be35311ca97c84a25de57a891f08b6a215a. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6df418f0-e942-43ef-a862-186edd16a54f.json and https://artists.proofprofile.net/proofs/artist/6df418f0-e942-43ef-a862-186edd16a54f.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 0x5d29ecbccdc21da7195e44868dcbce81587f39baed8702c9e80d738b7839be67. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRPKD1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f74895745b15e472d9f86501943f6a345907a073c69e51c21d6a686ce2e38b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BRPKD1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7ce9866663bd15fda042e27f0951d2d2a9b33e89b986e32850622db465bdf. 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/BRPKD1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308c462ed039398ea6b089b1d1d5a316151c0b0e54b80fcc422a7caa9ab94b2e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BRPKD1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9061834b77cddc0529434dd4f99fd8e8b54bfbcd3862dcd07664daf7e45781d9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BRPKD1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89a6a87507604580bc5434d1695c185cf7caa99e7ce6772d669d16cce38b92c. 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/USHM22363326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9d75ffead04ea853242980c14fb93bd095f24c940c6f41ca2d37625bb13a8c. 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/USHM82378124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56a1779e12d8780bdbc780d07fa5d37224865f75819c7da339261b67137acb9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BCIQZ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab546f4c08721e4911ea65878853f7d08c99df446e9ca89177bd2a0f4849f05. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:20:52Z), 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/BCIQZ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a3e3f04a657663497658cad3ade041bfb80a4ba818c5f3b7991cd909f18cc0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BCIQZ2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b004be43b95fd28597a7c97e09ca8e5f5b09d9858a8721266f6451bf4099728. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BCIQZ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9193d2f449aaf68a327af1371ff54cd7603e264cb6cf9420fae144afa1449e. 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/BCIQZ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6cc70c434a1e313885302cd88a25388ce6377780f39b6890e8bcba84b5f845. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM82378311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae80dd6b75f287ee170282413487245cebc760bd4513de7bc87a2a3502f3e5b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BCIQZ2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd84c4ea8ceefd5c8b2b70183df91d4f321a56a8269053aa55d68e82d8541cbc. 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/BCIQZ2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aecc597b31ca7e39f3fa201946d27af50ca3f527c73ae9d02aac5070ec3a8cb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BCIQZ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fec6be570d843053bcbd9ba5f8391c21b7cf23dbb8829a3a9a2ca58f8e4c9b0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USX9P2330063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaffdbbbce6ee10fd394538d318601d251137f3b434a7b6ebf2dd5ce2ea8f8d8. 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/BCIQZ2300003.