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 0xd80a6560ef2d6122e6e99f278b4c2db719fa1c3bb167f04f2e92394379491494. 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/6934e822-c3bb-4bd3-ae5a-61474b36e6c4.json and https://artists.proofprofile.net/proofs/artist/6934e822-c3bb-4bd3-ae5a-61474b36e6c4.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 0x6b4eba5bf9477f77a2c5a4fdbff7cdab686bdd83d09333b114ce0d40b3aaf506. 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/QM6P42406044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994b1cbdcb1828b27ef63f0b8d74b2920eb0befd226177084cd222dc9eaa6ce. 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/QM6P42406047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4d1efe4d0a72d945f69e3ab591d24f9d245c08d4adff8101c23130692ae1a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6P42406048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab65faa6dc3c14a78412319fd219df85926ea3c283d08e7b05c1b72ee83f4ed. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QM6P42406050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c1d2a7b9379effe671aaf342be4528d92b09b9ec4aca0a6d0fffd06776cd1f. 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/QM6P42406054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd4120cd9aad97388a090107de7690ac6654307c62af001177be1b8e0189b94. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42406056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3637a491f9fb4078225f4b169ac69756235e536ab65f0d6bc061b2bb288630df. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM7282591909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5917aa572bcdc23e1da4cecbe4deedf9a3d062339cdd3b1d9d20b7cd28384d12. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM7282591910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b53292f3052df97bda854b449e46a8750a1f0c80a8d3793eba9f629ca6b88. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM7282591914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fcd03e8f7e12ce42d918f047d10a68af70fc09d9a4ac8d777b17a15e6d6f5. 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/QM7282591918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704511d27ff397283091e3b3ce412560f3b69dafbb00453729169e90856125c1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM7282591919.