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 0x8a2fd855676b1c09035daea591fdf024dc1d2360194e4349100beeec54b5ef76. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f255e1c-10f2-4f46-bf58-9628e68983a1.json and https://artists.proofprofile.net/proofs/artist/1f255e1c-10f2-4f46-bf58-9628e68983a1.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 0x1506b0a4f14aa182da6299bca69a725f7e6e4ec7c74ae372da1f9b13bebee2b4. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZF8N2088598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf396a93be23e53569614e001a4d7fc795be2444442c0f8baf59194390bbafbac. 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/QZF8N2088599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8de3da2b0878f5766b8d10a2b2fab34bfa6698de59f48e60a7d0386da2504e. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:43:23Z), 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/QZFP52040684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fc02e768440b09636a32e9b472d92d429059684efbe1880aa9f37f1ee39f15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFP52092999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb90adbe566dd1c55cd8d93e3fe4159670c96af15c41d0c39882e3395ffd14. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMHP2094478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25e69e967c4e7238456c621b4f180b7efaa282c5886699b93bb6c77449b62f5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMHK2012199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562a074eca7772773d6e665fc10128e2e8b2509cc3cddc444eb6bdc8e16a81e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHP2039742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758508539c08c0ab63cdee0a8d270d42c270733b8f81eacc37641200f551040b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMHL2053439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e6719ff53d803785b5ea16fbbc818a52f5d883ff18eab0e15621742fc39a5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZKDK2158737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ea9721c7d300fc5c130b7bea8a8b8991ed5815f9bc6a004521fec46b219a44. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZMHK2078751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c834504f387f282dc18841c084b9cf0ce43e5991495909ce4ac0830cd372542. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMHM2098388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53a3a9c749e0a931a6269e385f9535ebfef90334f7e4637f03c011ab97cc96. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM42K2251721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc296848560d4ecfa2f7429e31d51be7dbce0e7a79529d5edcd17c9d6095a6d79. 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/QM42K2214078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11d31a5fb8b8bbded38140038ae632393db6434a8a5a407b700575088760e2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS642212266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2804311b54cb0ffdfd4a7d0fdc166e9bf64e8a281883673baae1e115e5787e3e. 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/QM42K2346638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba9085c9bbc7b232d9520b2c9a3688231f8f75dc2348e6402641ec5f33acc3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZS652293123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828be12f30b17dfe08038fce067ff888513eaee4acb95ce6e41cc9d59c26a4db. 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/QZMHM2210597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3854870493cc51af3daa96bbf407a933551b3b0380ae8c4c9760111d0095b0c6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:03Z), 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/QM42K2215075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9ee097bb837038631505a6352209c5805160097a0053537858394b6ed06999. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:31:03Z), 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/QZFZ42512798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dbe0b2b5685ac11d93c32eb4667e83e9c7eda23ec38d81e82579b12dac3302. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES82547282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd9db55ffa0e05742b59879b4b9d2e231077c2053d31c9219c7f895a836a123. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2508879.