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 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 0x8cfcf559e27587626474f1be600a6eef1939c47928c4bfd457ac2aeb1f3d2b3c. 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/e2f7654d-f176-47c5-9497-5dc7a426989b.json and https://artists.proofprofile.net/proofs/artist/e2f7654d-f176-47c5-9497-5dc7a426989b.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 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 0x7602e0323cefe3a7946fc2e395297b7a93c069b1ee2a518b957725768cebcfed. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHZ41950515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3423ab7a6d40f41054868ce596b2758e29064282732e3b17345d88fbe77d717b. 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/QZHZ41950518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d408eaadaada6e0e7944330b0117c1534aab276ed301e3c5c6bfd896b9789d. 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/QZGLM2109140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e819e083ea61960a516279dc6c9cbe3adf91df4cad76daeb970d79b4f50d848. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZW9K2250409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4a94f67c1094cabd4f63f6f6c3807e4bed120b4f2adf5e833ef6cc3e7ce7b4. 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/QZ5AB2063520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd117f1abb3cbb7051c161648d4e76fd7ddc2c52c0812447339b5506b99ab319. 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/GBLFP2385653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c514d67c07fcd5077e227c3cdd3be94e440b2b096dd04aa6c19479777cb703. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/UKXN22322478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eea689f9665ba96164f106e5d0fad12d173360d45db988e041e968f2221bf1b. 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/UKXN22322486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e1972bc4ded42040f96ba38cd2b575080cc7dbe06a73b399bfe8171843b0e3. 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/UKXN22534511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f65d4156d7b643415d8545fe4a90157c9cb836cd0626fe931d3d5378380dc2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKXN22534512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462981afeada78875454803ab4b8be6422050ae604cff7f78d59ffdc02164900. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22534513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5373161339d895e28f849544e9f8f28ab6c5eb1168f5953a214bdb8a9e0d5d8e. 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/UKXN22534514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a09dbc0e30ef9a21f779e0557e803880b18de6488788a48f01a2bc9d853fd7. 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/UKXN22534510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6a41e3c507a81120da2a3f9d9bb5ca8000cf1073d659e18432b6d8aa72f89a. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/UKXN22534509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b6c5a1b09e051e429b0fec4a8810b6cf48ca0b74a9e837f4477c3ec661471. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/UKXN22534519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9ecec2e22f020516997219997174c1d5277968cbdc17e831cc208a8d88af9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKXN22534521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7018c9bd3a7945d213843cadb0ddfc0bf604be915bc39142fca7630d4dd35657. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GX3Q92520240.