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 0x764ebac660f9aaa63a2a5bcedf6ebeda572bb98cf63cecccb296dc205b6c8bf1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1032d2a-e915-4f47-a218-b0c37c9fa5ed.json and https://artists.proofprofile.net/proofs/artist/e1032d2a-e915-4f47-a218-b0c37c9fa5ed.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 0x6d8891777fe28d5bae8757355697f1babb21301698a34415fa842da120e50c53. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ESA012448309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fba64b8903f41590ec018ed85a2cbec1849a5c6a45364309b5e5ef724dd7e31. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ESA012448310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27231a245fadc4ba61b8c785be6002561cdacff65233e4719accedb91119d75. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ESA012448311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f47271de6c88bfdbb45c7d57b2498756766589fa6a39652ecd05b88b6f05c5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ESA012448312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1996dd391408111d8de99dfadbfcaa1d472acd42ccdcb3622a47b8c0ebfc194e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:28:31Z), 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/ESA012448313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a81f92ea290e645088fc357648f998958831c67460feb350f9bea9e079eb8b. 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/ESA012448314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701e556ba241126e1c6838315d92f77b1afcb768f2ca974309085cb8e5c97fc1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ESA012448315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa5d7652cf10d020eaf3cbc7abcf438050b230a53b4bbc56a08a4c174e39a3e. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/ESA012448316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04593e0bd4f97e0058191c2059b733ac65b8c1e4f9be8452ef660da8f08bd9ff. 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/ESA012448318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb942ab8e1282b965bed2dd2ac06d67d5fcee2fb2582a0b732b543645df747b1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ESA012448319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343aeb32253b3df2f54507333f961ca07b0c5e775e2bd94885e04d12882e37c2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ESA012448320.