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 0x090a24e2dd16528e08923ab3b96c60ffbc18be03c862bba119a326a73c69dde8. 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/75a4ac8d-489b-4d79-abf6-938c1a294ef1.json and https://artists.proofprofile.net/proofs/artist/75a4ac8d-489b-4d79-abf6-938c1a294ef1.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 0x3d229c6158a355ff10a079f9eb7354e61b6f6a84240f0c39f9690ae061885838. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QM4DW1807757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd407d892ec7170755bc86b848d2493a29b8bfa215b17fa0ebe13cdc2387bb060. 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/QM4DW1807759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190552bb8f64058b0dcec6ffabee9599a7408a4a390ec328e04e231af4429614. 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/QM4DW1817933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8983b870d8aafe18cf3f11e7f7a90fdf3ae624c207f4d52544d1f1d29078e564. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA41821784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb010fbdbc570419e636717d06af825f49ee0fc40df4b1433c5981506cd84842. 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/QZDA41891447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc418bc764b104d4d5cb75fa8008b7296891485b59fd6b36e7d3b90a0b552ef. 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/QZ8LD1918852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f9e7ad8bd511bd1271f139a7d8899c6de07518430e2f50b963e11188fa8d6b. 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/QZDA41929945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b1e9349c8718a36a39a4df2b9666f7b60f07080aa1c57adc509b75fd9ba122. 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/QZHN62003912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f3bcbcb0dd4837990315f14d9c52ae2ddc33c60cea388ad9539e0e794d0750. 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/QZHN62003913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537adc0a4151b38f40630f0f0d7511773c465642d257851e71145503e25a5cb3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN62003914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888930a2b7ccf94d028ac9e82085ebba03433de99ce77332e4885c65be244ef0. 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/QZHN62003916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746d9ae27802edf5232b41a617df1f4aa70ac25046e290d772069cf714062e73. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:12Z), 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/QZNWS2225882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06309a2ac915f2bd05f2163475755f365ce47b9d4e47e3fe56f7bfbe9b6756. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:55Z), 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/QZTAS2202371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88abdfd9dda0ed69610af2ea1a67d5d7b7105e69ede07e4453d4497ff1c9b734. 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/QZK6H2377573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132e720195d9dcea4aca06a09d84328496f564cda6fde9149f74c3dc6b87247. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZHN72550006.