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 0xd116b8cdd5433ba476fded1afb9ec5757897eb5eb9bd2ce16d6965b405af5932. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/490db99f-c339-4c41-9f28-1a3610bc0b10.json and https://artists.proofprofile.net/proofs/artist/490db99f-c339-4c41-9f28-1a3610bc0b10.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 0x7668a4d6c344d069b0fdfa60bf5ced02a03dc73126aeb5c2500daff12298da99. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:58:59Z), 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/PLR361604002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ee43b59003ba98ad8aa2f5c8f6ee54d1647edf6aff3c57eba7357938c737a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLR361604012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc17d3829e57f379e1c0b6ceeb81b76ce03785f9ca183c1017aca07c2bcf26e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PLT891726601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee9912532a4ac55120fd5c0bdbaaeb4db5a60af90fa3c4b65b0f9f41e149d69. 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/PLT891726602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab045f576a74fed0ae02f9e23b6ca4a4ae8d5a0866fc44de329b4162a466eafd. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/PLT891726604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfb1cffe870ec2e3acae447c5fdc258d18bee3b06043697f89f3ca23b5cd72. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLT891726606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09bbed587c5f1cbb30f2b1fb9adfdd35267de2f6a3fd9e962de950dd02d47f1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:54Z), 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/PLT891726608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaf522f590233704564e0b0a165d191edba5c89e1c84cf80a91b57376adca3b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLT891726609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf76c42bcfa15d5f8b3ae26aa7108e1dbc5f8253492e708c92d093ce41a150ee. 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/PLT891726610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5908fb0d9ba3e5b95ae8d40aed845d43c429168aee61088e6be94a06066dc5f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLT891726613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe56fd6fd533cf1db137ed8dfe6c0a0dd3575f04dea9f96a10b6d51506cab43. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLT892299704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a786468aff6625e18f780293bc5d8d5d9983412e454ec5266d4d41bc27710cc. 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/PLT892299706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922642621b6657a97d0592818614bf56b42a0f9ffe05faf3c380b0a646a8a50a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLT892299708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce786f7d8a4139ebd2f410493b7c42a58d1bf4e62b96cdb59caa0c7e39b126e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:07Z), 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/PLT892299709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a0bb2478df27b420ffe9c4ea6cc4809f1f64903092ae6a236370e82e96083b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:51Z), 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/PLT892299710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ff784ac109c3eb157c1756e735d2b14a101299aee253c91ccc839125727cfe. 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/PLT892299711.