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 0xd9ebd2a702d78b3543ed43353273986644089e22147e816e79d22825223f83a7. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08c0c7db-5a62-4434-8216-cc35336ded69.json and https://artists.proofprofile.net/proofs/artist/08c0c7db-5a62-4434-8216-cc35336ded69.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 0xfcac78d554fbe4f05f729193c623e9408e96c7ef9422a509caa85c47a7d04cf1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ1853076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc768fbb3892caafeb93cf79d7030c88ab627f5a669b62f6df875f1ebeafb6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1853082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8552b9d09d73cd7225e1734a3a2ca77362a42d9f212fc471d8f194ea64159d39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ1853083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe25c13d49299e3582ad068fdde4ba978d5cfb6d85a3240958f371b5b672f076. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ1853084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ba6e4f7e6009600652774f0e606df0a3dea6fa67fe34d22d2e019477990b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ1853085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac32b78bbd846b378f9830c5370554b969d19d5be2c1ef54f6bce4b2772393. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USCGJ1853074.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda015f7185e2a91dc4f29ffe36ea4144e23ed1c838651f88b77c2c142b8738d4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGJ1853075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df9a99297c77a3cd74eeb18977bef6ec2e5cb4436f290a0d457b1890957b4fd. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USCGJ1853077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0031c5be61772ab153babddb4a6e41c3213b98227a689f909bb722056503c8. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USCGJ1853078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdc884f6b4bd379b2482dfe4981681f5f78f1b76e6d153e08e16e3a4f1af33d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USCGJ1853079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e94fe857db0baf091e920bffa868845a872bd998c91c80898112cf2426dffa2. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/USCGJ1853080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3a582ffaa97ef3a0755f1451f6bfa1b9b9aaf0616c3b948c38b20c19434159. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USCGJ1853081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd175393eea66db2ed5b5d7702ae245465569e42a440883d78a915e6959c623f. 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/USCGJ1864526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f93bd3b37a384f80df0fc0021e4cc42c5b4dfc97e99da2da262f16f79f6f212. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1864531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b56343f9eef8e6ed0ceb6d5ea78c4c1e7a05382a5c85e9707e1bbc79fc947. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1864536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60addcea03043dd184fb56a7b0174329230b850fb249d4a1289950f89f25a61. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGJ1864527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a790d1005d21af43c266e1d2e8e4f4790dcfdd393382272b9060bfaf1c9fd6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USCGJ1864528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe373a90d133d2056381aec7665549eff3da71ca16b42696dc702293fb72ea128. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USCGJ1864529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e115db771b8f0b98629cf02ce1b3044b69031a43f7ed06b3ace4e91ed0a6a8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USCGJ1864530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db1d27495b5b6dfd975d7d0e2400306c9d6ece8157fc2a920c705bfba04d480. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USCGJ1864532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a835e3dfcbf9a49e116aa036e34613d764c7a055f84b2a9add2114e18fe908. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USCGJ1864533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c479027f80193d6a68dd094579b7efa9a3973d6f1dfa65a410ca7104d010b28. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGJ1864534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a52c8926d3a2dd392251b45760e9e477a59f6287b61aef22805edd7894c71b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGJ1864535.