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 0x20f5386f3957af6229bd2f558460d368cf56d839f596062d4b41cf87c35435b5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c94a4ad-ac67-4425-b65a-bb13eff851b5.json and https://artists.proofprofile.net/proofs/artist/9c94a4ad-ac67-4425-b65a-bb13eff851b5.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 0xbef6f7e25c8979020b9050e8cd958f233adfa91f6645b6645bf9369cc439f16c. 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/ZA3501700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5152288f927a1064a2cc42865dcb963f8c183999143f3cdfa435d6a6e19b2e6. 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/ZA3501700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ff5ba8f78c138cfb7868a0b75988ccd7193c4822e34d636effba2909274d9b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ZA3501600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc53791c88c50cbac2f21361cdc46f84c4f34e5dadc5a188a90df74672c98eaf. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:24:56Z), 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/ZA3501600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e6880b4fdfdd8d9ff39de119ecfd782d1c284837d38cccca6e2e34dcc4773. 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/ZA3501700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f5ec3e0d40f9f769dc03a3bb85bc541be85f874b45f7214d519a992a5185ec. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:41:50Z), 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/ZA3501700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98676aa7f6e229ed539eeca2046e414f2bc84302c2edd5a273ce441b01d7a3da. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:52:46Z), 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/ZA3501700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fd51fe0deba7a6fe2e2a72ad5bacab323ed15aee8f31777d65937c8f3dcd26. 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/ZA3501600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e878d7e0c8eca709171a8b6bdf7f83e81fccae28bcaad0ad1926827652e985. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ZA3501700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55902396520bdc3c2367029c602c976e2faaa14e6a5cb251f46410428b7e78. 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/ZA3501700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b565bf56f5de71cf2b89fdebd18383d0965abe02963d5bfe8f74c5874ba43df. 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/ZA3501700014.