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 0x4c43b22161dbda7bf25969b8cfaa00586fbbfd646bceff4eb25348ccbacf204a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8ea6ffd-9b88-4aa7-a739-10ad6ba9d023.json and https://artists.proofprofile.net/proofs/artist/c8ea6ffd-9b88-4aa7-a739-10ad6ba9d023.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 0x4385a86bae260c412d3de38a4a0db78ca3d101fd57fc026a154b4fffd2b5f55c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:12Z), 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/DKD3Z0019065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ab1ae036d58e251d14ae93bcd258d4e541f120e48ea4d35b4590e4410dc69e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DKD3Z0019061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac98fc65bca8753fb878912848c9c3839f4ab7f34ade4048697668fbf55fbc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DKD3Z0019062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f3af676357997e79f042e3dafbc8312a65aaa4d9f7fc1a2a2da9b20b3ede60. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DKD3Z0019063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f679501107de43034f2fe3a296040134aef029ff02e8b4535d535d8136f20a9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYZ2574758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde461c74b3adc895fb1940e2ed6041d0d55f4875f66bd82294ee7c979fa996ff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYZ2574778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f694bd24ba5ed92bc09c4a884dc9df6ff5370f31877a6b367263216f5d4b08. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:16Z), 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/QZFYZ2574779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f423cd6a65623baba334d5b6283b73ae2937f01466900421819e5f618b973d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZFYZ2574780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd91a76406b97cee5e06832703ac89ae74085f1c06dd83cfd3f2a124ae68e17. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:28:00Z), 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/QZFYZ2574782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe58fc6c1ff0a0714de63f40de2ce5675f934d09701cfefdc68257c0480d6ab. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZFYZ2574784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ddd195942b620e6cef46de1ad6a74973cfb021e2a0367fcff5cd39ce81bd8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYZ2574785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694bb9e3250d98d13310594bc586e5edb5338499ccbd03bee4e166184fd47ad0. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DKD3Z0019069.