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 0xcc9ff79e2f820ba10ef0b12a70608557a8a5826641e02f39aec5f7acb98f7370. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5a48123-38ba-444c-81c6-1ecb19fda457.json and https://artists.proofprofile.net/proofs/artist/c5a48123-38ba-444c-81c6-1ecb19fda457.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 0x13ba103542eab8d383325435232138185ee7e8de7c129341f9053bd3acb70868. 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/TCJPR2279972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928ff9fa9096967bc1700831507986f5b7ee5b23dac7bd7b203803ce01855c7. 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/TCJPK2044584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be7c2ac60139d69b54f2d72eb4a7ca1c0624baae897980b64a9302907ddfbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPK2044589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9c3cc88bd568564f1d23bd81e3f0a598501b90716a503514e5c97515e255f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPK2044594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ea43147384e5c24a580177c70115b53652350b7dafb64edd1d983d87771f9. 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/TCJPK2044601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb893248b5bfe4135ab1987c2e01b70572fa2659eccfa938289788007ffeb9156. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCJPK2044605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f23801a6ce441c489c65f645ed4a931f62d9548357d0fe1fbe9fc1a1a2e6b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPV501800421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b8b83a501f5c4c3c59659c771ad26208cbe161f0eced1c0f40a015a59f9db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPV501800426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f15b4678f9ef9ffdda03a0a72788ce84ae697c78a877ff9eb3be0055f062627. 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/JPV501800428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9efee2fde78ef04493c4bf3aeb4863aa126b4c618b4ee8d583a0e84bab119a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPV501800431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3eb922c38205de01eecbf6a01cf1168a8d307898795030e68fcfa2c05be38a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPV501800417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ce77f0487a9d69857960e96fc65e9a7bafdceffa4fc8cc7f711e11b89128e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPV501900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437044fb71019f703ca365284b5cf98b779e3905e23f7181496cf3a249edcd38. 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/JPU651503200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf514ceac52d645d0fec40b9337ed9db8313563f70f31c25de10f08a1e57f39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPV502100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf834e4821c44be98d433e5eceec6085f4207e1ec903c43bd948bdccbc7404e73. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPV502000872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37509106e4b8ad7eefb5c08a5b4bc4be891b03b56cfb0665d32f1cf8d96a66ef. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPV502000867.