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 0xf24cac31a9ff0e8ee9d65974a3f79b38a060fc9f847aa670877396594ebf1ba5. 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/414c85ed-cf2e-47c8-aee3-ab10385bf43a.json and https://artists.proofprofile.net/proofs/artist/414c85ed-cf2e-47c8-aee3-ab10385bf43a.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 0x0e3a044b739ecbb910a2f3cf39882e2c3466ec96fc8797f3e12a9fa5cb3023a4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWV2164030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f872bf565e050b837d7bcc798c2a679d94fa5976dec342835a273bce2a9a366. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ42218134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67abedbe65778f4046893d49b79f7df95fbe210774a60dd2e7c5ed8f72cceb8f. 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/QZHNB2271365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a461b08b184cb05192c8c1cde9aff4d02c8f3c552aa1a805677f16501e886. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZK6H2227740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f7597231b6680c280d6a438a81363b50876c470f59da5a7518db716e623d46. 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/QZNWV2235249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb81763a352366ecbb536a0edbd01a2af93ecc27c8c8307adafbcef05bc98a3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTAU2234973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac261e3fd241ad58695a91e3db22c0b0543027aa687d0a1e873837d684f595c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:30Z), 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/QZDA82376820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2536f2f2aceb1631af327b7f29761a812236d3659a98dc0c37b03db5b39bf01. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAS2368035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7027c9367d6deeff718aef3e61120ec056245c1f57ef133403a12d960af72cb6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFK2388703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7493f835cddd17cad95e6b9d2a33ba2c120580889bb117eca2df5bd949d41b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZES82495029.