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 0xae9208255b514e0232760455537b5f2b07f1943302e7b293d1cc9fa7939c1977. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b1f8c3e-3b2f-47fd-8e60-0b43f55230cf.json and https://artists.proofprofile.net/proofs/artist/3b1f8c3e-3b2f-47fd-8e60-0b43f55230cf.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 0xc41ffc6974693c4f1431796a7256a582441c1acb6de80bde1f365a73c478107c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BX23P2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913daee7dbd11e5d5f8ce8e1890b78143a875a21be3fd0eda5b7c69b7cebe00. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BX23P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211aede290a69ced75bccff642c3b7977884f112d947822bdef6880f710a87ca. 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/BX23P2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa831d5c451a5f9c110462f05f12a42cc4230971f05164a3d39d4f7337115a5bd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:30Z), 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/BX23P2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b5720e2535f4fef7dd092b15e15518df3bc02d85a92e18e7d20be895254ded. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BX23P2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf149f583bb4ca48c2bacf8838b20b9b79e4e9bbd33e043da9827bb8c584ed9ef. 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/BX23P2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f1188bc86818e94a4764040cc50943b37fc104f5b85c1398d5eef5405e2490. 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/BX23P2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a14ae679266ba44bb0e36b607ea08d6907cd916e12223d6a5e4e96ecc418e32. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BX23P2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74772900410daaf31b26387e101fc3c703bc56195dd110366296beb044c3d057. 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/BX23P2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abca34d0d14de2d2afa854e55d29b05f6b657412c7fc2e41cdcb27588c2fdb0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:41Z), 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/BX23P2500010.