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 0xc5c565b9ccdc7e200067c3f7ee7a8473d5eee3fa213f6d6628ee555e56cfbb03. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8566d63a-e67f-4ab0-b0db-7283058d4ddb.json and https://artists.proofprofile.net/proofs/artist/8566d63a-e67f-4ab0-b0db-7283058d4ddb.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 0x29ab5050c152960d7fb97e7d4baf2f0361de3ce8bb8b7b0bdd0c15370fa84af9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USG2M1700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bdba43982e112d4d42b59ca71de3ea2af645bf1e0fe0b46b3c8d80141138a1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:37Z), 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/USG2M1700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831b355c1c95266e9ab140fdf890936acccff4def8a08125463621e46324efe7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USG2M1700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8bc85b5772617090db6ae6df9d24ecf14337270f2df2bf0a3ac5d45777165. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:08Z), 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/USG2M2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe5737dc6d5c883de7f0ba6323a9efeac76e9b7ffcd10cbe6aff0ea5c25713. 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/USG2M2000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476313866747d8ccd589d0e9a84d6f02e5ceb1bf11b2c14ef301a5494d08ef9b. 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/USG2M2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c335739a2101dc72ddf0a1fae9bd730483b22915b24e0e706abd590d71c255. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USG2M2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eba0629816c93dc3325ab3ee99f557eaeeabc40b9ab305b698c80a3bd0365c5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USG2M2100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2088885c3928646e3e5253da0eb80485c5252d56aebf8f8645d67402f8ebb010. 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/USG2M2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56310d8478d00b61736725af67b7822569804948da2e9f550f401e93a9daa28e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USG2M2300052.