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 0xc19705df6cee8564af2dad90d3399165e513e1f4281b76043c8596b2b7cc2e88. 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/8c586d82-a03a-483d-a79c-0d3d792edb96.json and https://artists.proofprofile.net/proofs/artist/8c586d82-a03a-483d-a79c-0d3d792edb96.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 0x499660b31b675ca579c10df41035fe3b742b54a1f524f7db564067d272035b65. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABS1340625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2067bbf3503befc6a1cf25ea9af043b0a5bbcf989dc0749ad3163a23ca0674. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:06Z), 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/TCABS1340631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9985140f25752a4fa82abc10ed599aebaa61bbb44309ac66df702cf829159. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:33Z), 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/USA2P1897850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd35c01c81439ce9fd9a84bebc39d393110644dcc3f731144d14681e940029e. 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/DED832000854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc331c59e2a7b8f0613d6e255db8c1546321693683ae8aba08c9686647f08376. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/DED832000855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b32cccbf2ec4c5f47ee6524b9b29a71653800f5e937f3eb820ff7931d37a35b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DED832000856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc63a59943a9ded5b18c8415351257fed2ecc9a95a54260fac2899811182757. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DED832000858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4463aa1cd9b95d41463c8dd48cb6180533de585d44c2f12d3ae0ba0cfe8b8bfd. 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/DED832000859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e687fb7da53991ff18df0ab6d2132dc64e6cf7ec5ef901884a864a8ad08c1. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DED832000860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c5e22075cad4a4c74d7622600ab241bac416623cca5b080f45909fae09b87e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DED832300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5550a91bb0a7c114e62feafd21f23909edcda284657b9e82443bdeff31e18374. 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/DED832300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d24e2353e3811136f6a3a39c07bb02f6ac49f36cd22dda718382f2abd0111d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:51Z), 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/DED832300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c5e22075cad4a4c74d7622600ab241bac416623cca5b080f45909fae09b87e. 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/DED832300454.