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 0x46f8659b3970a9facb4837fbe203261884edd110535fa1f3c124202e7615b35b. 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/86070b42-ce37-469b-9700-97b117fe2a47.json and https://artists.proofprofile.net/proofs/artist/86070b42-ce37-469b-9700-97b117fe2a47.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 0x82d56e0da69b27c578f3be27116f7ed9834906b7fb736b62aca9fc508eadce3f. 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/QZNJW2305937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe1f30355d809c556d3f6927282dfa1cda91db41c47f97030724825ab563301. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJW2305938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198b84bd5f1093cadc2ce7bece064b3be6f610cb6b39f07f217f9a20aac546f4. 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/QZNJW2305939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70d1499a1e4b86242481689bcd592bf6010cf25048d83d96d526faf8d140c6b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNJW2305940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1da5a4e5e33dba3563f366f2596ee4906afd6265c242f9d57da16de62de0e0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:23Z), 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/QZW9L2459951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657687a807879b0571a2c1164890d8ea81d1f9ba7e8a4577e01a0e81b7f0a5ed. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:18Z), 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/QZNJV2588353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6400664307009af3f55ff58613b5c365d6e24b31d89a2868228c7d14b8f7eb. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNJV2588358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8530362696fe567ad6289588d3f0ae982e0eb007b15d4feb940aef12cc5cac. 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/QZNJV2588360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0345f29505d3a42dd89304037999b761d524145086bcc783a5503ffcdd4fac2a. 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/QZMZ92039777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6088bcf7544c353cf240dfb52b62e7c8ebbc0ef420cb689de2a93d3f093692. 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/US7VG1667710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98d6c393bee8a77b0e8d08d0ad6e32d80e63d223b87d8ead93076563672d2e. 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/QZ5AB1756387.