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 0xfad1936b92c798193d2c18baa66e41f37c14a064f543396260ccfb3a69ea3ca3. 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/c69230c1-33c6-4440-9a9c-43fe26bf2bc1.json and https://artists.proofprofile.net/proofs/artist/c69230c1-33c6-4440-9a9c-43fe26bf2bc1.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 0xac69f6a0246a80b2100f8354d8748095097565b3b11f94308a104bb4505ad45a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCADE1784106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1021ef317f941688acd94890bcc9ef23b9497624ac95b1a733f022f760e9d582. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADE1784108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b811a35bd65adcccc4b28ccdca765ce2251dbbf924adb8ef56ba70e021099. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:08Z), 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/TCADE1784113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffbc5f185e94a8b27874579d3f0fd9a173df8c082b32228db9528401e545d0b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCADE1784138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450c3b0def9f75381dfe50daef8adf98fba5ffde0bfafcc9a4aadf06b39fbb96. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCADE1784149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb68fd05a54ae6d4dc4163979daf3f8f3165cf7d075a641d1cb7fb2697c8c3. 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/TCADE1784151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835443e8222fe98d543789a1485fbf2b66489a5dc76c1e9284b9fdafb7aa98a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCADJ1716923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2839b61ddcbb7cfeae33486af2e950ac875ea1b39d93413430f1a7128c086347. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCADJ1716928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac2c9362b5bade7e91dce7e155bdbd13d4a58d3fe07226fd72f915de5c0aed8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:31Z), 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/TCADJ1716931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefddacd1b1741609471dde4aeb6e7ccc49d600a3f4554b63fb12e2cb6d83fe55. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAEB1907446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a8b29a159fac753a0c68895d51267e2916300248ce5a5f689f2ee7df8914d8. 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/TCAEJ1931128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a1414bbedb7583cc65167ea1438b54fb660b98f3a80c3baed9129fb52a950. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAFN2177450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9d1c88910690a9668c57e7645697616314b3c87eee0d8a0bcdfdd5ddc90eea. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAFN2177510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ab5fc712db84d254b3a09295ada925632f19f23b9c8267b6310c5f6a6eb0cc. 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/TCAIG2400762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ccdf0b09fce24bd2448d29753b26e8e182dfcf7d799909b3d8b85046bda38a. 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/TCAIG2400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffd47a8aa01a284fe538e3b90042202edc8527a8933dfd7a06799aae2893354. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIG2401165.