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 0xd878da012c538727e826443353cdc3bb8d7f84f654df6e734ce207b7df54e5af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c1e3e89-8c02-42fc-8855-3578ec81bf0f.json and https://artists.proofprofile.net/proofs/artist/5c1e3e89-8c02-42fc-8855-3578ec81bf0f.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 0x91a1b870c51cb6d28a3a27c140677c572517eeb8575958139c5864f84a518b1d. 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/QZDA71810776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac34e61277b1785e9819faeb245b9b018eaccbddf0f62eebe7fa1e30786accc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA81865485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e26574d2297d193541b868a36931d18e1a2f332874de762cab90a4ffe256c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA81865486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6f6cd811d071b4b0ae96465cedd7a69584661618a7daaac1a2e6ccdf7bcf2. 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/QZDA81865487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c75db3930fa798a593267b9750a5ab7076ceb07de07b84590d513eb01b4a82. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA81865489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60817a684dec52ea477b98fff5155aec40d3d20c8a7e22e790d2ed0100a673f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES81894965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b261718fb03ee73e986fcdc2ffe120a90712718a1c60720eb1e2234cee3c8b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYX1967144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceebcdba9fcf8f24f748b81938fb963d2ed78d9d98d072f858d5c070797b342. 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/QZFYY1974673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36902531cecf595edee6f85c273b479ba976adf7c54664dd355ed7655df73c0. 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/QZFZ21918426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee07e20c38fcd592d3598dd004f7467c31cece953fd9b9625461ff221379a50a. 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/QZFZ61914194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b6a900a24870a230632e61c9d050664e4f390120030c4fb62b9be0e19517ce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ71983225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f1cf259fa1a498cb75c9c2b83faa65a35de62e1ab42bc4532f9e91e2146c4a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ71983226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814cdb955f1ce8e96efdcb201ffe19677372e3394c3441186b96896d12842082. 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/QZFZ71983227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759396b03086bb61bfd7654a89fd94509001a7764b6df2f70877b37b47146f23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ71983228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e27d12547c1c5b7bd37fc72e14789d87eab7d58786b349391805433b64543e2. 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/QZFZ71983229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd45f27b6d769d1a777994b42017c60e4e68db56240a0afe675336a6168f7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ71983230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36902531cecf595edee6f85c273b479ba976adf7c54664dd355ed7655df73c0. 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/QZFZ21918426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1b20fc0ae990e5d09224e1db8b4388bf933cfdad4820ed451b012ab4625ff. 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/QZFZ71983231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cad598ba47ea159f0ab4073b4ed73abf0f2e0d87b642a781cbfc8cf23ddf0e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:18Z), 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/QZHZ52146847.