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 0xf191b8b0a081194c24a386ef2258e7eafe93fc0f6f615dab001dc0b93a38f30c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2925b363-0dff-420c-878f-bcb6e62ce931.json and https://artists.proofprofile.net/proofs/artist/2925b363-0dff-420c-878f-bcb6e62ce931.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 0x8b38cbf81744be487866a062ff70d6c4da6e95e5f736bee80fa237c68362b2f7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADU1819696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2defffb15b83867c94ad3a5019d78bfc5ba73433efc8c47d2de9046b49afdc14. 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/QM24S1835091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be125c35981128f4bdc3d740663171e195ad7344de2cc8be8bc93976939c242. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZFYZ2088918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e0464c1da6d8dd5a7d73440eaf7d8faa0881ad33f7ab5ad77012a44920cee0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN52047864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0722304d8e3ba936ef1e20c2d18fbc9847fab99d7e412e8c2cb42ed08182aad0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:56Z), 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/QZK6J2276597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea9b5ef01d2a9ec06e0e0223529dd93c7f2751b5951ac5f29ab0cf3df975b16. 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/QZHN72340773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc357ad2858970a3022847388e7ce983beed1cc1d740f25b968f8575e4998b295. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN72340774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83685762dc2ed8eb873385c853647f5259b3dfbeaac6fd5f271a44e8f12d73e5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN72340775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f62cf1b29188dd533c2625d6b36ead41301d16303e3b597212d07b2ee6c21e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZES62411930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fc863e79a48178f1c5dd3002960fd2b8d24a0e02a1dba0f1decced20fafcdd. 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/QZES62411931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75797fc7c885b97bf22c2e3326b2f88740d59ab99ef4bd8c6b51dc01fca30e18. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ7N2422102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaad7b412ec2f29bc586bb18e25db1281f3443389cd33eefcbbfa007494e80c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZZ7N2422103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa430f2f482b8635b001cff56838d0286dbcb971f816d704513fb436fadcfd2ff. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZZ7N2422105.