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 0xe6ef8135dbf924189b7451c79ebc035cbe8c91db5ba04396adba1df6315fd808. 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/c3645b63-4ffc-4914-9d9e-8e0b3a6275d5.json and https://artists.proofprofile.net/proofs/artist/c3645b63-4ffc-4914-9d9e-8e0b3a6275d5.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 0x8f825bf07523143809e9e6f49ceb13d829f04450b2930613453b7a8d24bd88b7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJT2512019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef9b91c9a297b6594fca0aa40de6861f58e551dc8d93c75b7b82b3b037aca61. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAJU2568052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e114123724288961991ecd53ae83d9fd6e705f87e119beb5840034352a67172. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:03Z), 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/TCAJT2567913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74402956247fa6f4f73c2eaaaa57fae451a64c2543f0fb1dfb185a7665b66c1c. 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/TCAJT2567960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9affcdf2288fa86abcaf909bd2743b2dde402fd9df88f45f743d61a6eac1c3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:05Z), 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/TCAJV2567774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5bda4771d0a730ed82b12a1697bfb6ad6a6ed0a760cd8a867a84c44f1d11d7. 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/TCAJT2568022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac85d506fd3a6c336de90c8a89f6bbe45b79055ef0409efb4b7d8a0b9854b2c3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:13Z), 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/TCAJU2567843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a79ebff00011aacfe669183796d3d3eaf6d5f45f9eac2fbdb3b8c70e5bc972b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:59:35Z), 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/TCAJT2567989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a34516f4d2bf39a32cfbc292133950eb8fdc18807b3d96215160583048cf08. 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/TCAJT2567808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339e92c971ddce79d2759a04372f2ce96da1b8c68c3f84b0738fce019b992176. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCAJT2567883.