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 0xa821b8eb000f1a85b0e49044b04b33f3c70eea3d89c5fd20b21caad63e87f3e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/614f2bed-f122-428b-977f-e203efb0d220.json and https://artists.proofprofile.net/proofs/artist/614f2bed-f122-428b-977f-e203efb0d220.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 0x061d80ec4aca6725712badff8210733c792309778ca7b557b18549ec6225e77d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAEX2024546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc93d55b68f58d8adf1b05bfcf4c3c6f96eb108ce4e00578521d325efa7a6f75. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAFA2004542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51154e0366d0fdad488e5ea1f9decd5d27f5b6740596915ccd5009aee169960. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:09:02Z), 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/TCAGX2354593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26284db472766620adcdcc9ee7fb69b91c0066bc4fcb3a8c9ea779911e4c3345. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:39:29Z), 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/TCAHH2316402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b39e889d21267bc99eaba327ce3dc872697f232c170defb75c99518bc23d42. 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/TCAIB2407164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07663d8d3134a97e107f40f03c28ff57cb88c56b744b728766fe0e7b73512c05. 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/TCAIR2445444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d2f8da14ad2c6d1fa47e71db9e9b08d36ee4e1ce1e559244e9c421fbf8144b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJA2415117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9067d84e64df9a4b3841c9e6ba51f442c4db4734ff70ca87674615d112be7197. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:37:24Z), 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/TCAJC2422810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2181ff49178069c9376a6fb6de71e6c35fa60215c1844301854d14311a34d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJE2559579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c33ad216549e5d3952fec92545ad8bb58a70759bc83c5634fac7b6423f1536d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJM2594452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abb8988b4f7fcd0d53a42c9ebe043b3e6c3d2ef3a370942a5eb4b1178617f7c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZU2B2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38b4e1e03a654023cd4b093298506aff6d47075a2b0ae28ea88589a3d38327. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJY2510630.