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 0xf6608b0d998203eebd127060ff8ebb829e6d82a369aadc79768714374628fb85. 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/b743c893-e957-48c4-8e8c-4f1f4c1c23fc.json and https://artists.proofprofile.net/proofs/artist/b743c893-e957-48c4-8e8c-4f1f4c1c23fc.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 0x924d210c0833af9b919d4d2064c00979b0d43e5df9e6f43af075241160de2ba5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJE2512168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c97425e31fc89e2c79b9e092802e842c63b029a1c1938adb4f7ce9567d842b8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2512413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b644bacf8bd1cac094effc464f31c405614125733925d6483613dc03d5edf1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJE2512676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92bb364edb79917b73b1340c83d9f45405da319002a303af7aaf9d4c1c6e162. 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/TCAJE2512805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636047e94b77843824460a4daff7ae4e037c5e0ca7130e4db6fccbcb58e9eb93. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJE2513055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd0723a3634abbc14fb1cb99ec8e054893dfa0a56c4c6a59b12f284ef88dae. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2513326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c4de895c23911c0873ba7b6ae9f32b0851ae61e6c6cafa029ac17c298cbdd0. 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/TCAJE2513668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dcab3601e8c2d12e713fc505cfdb6970c278a5e9b8f8ef587fa5edfb667bb3. 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/TCAJE2513885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adf26d1c920cb0c7e5b487be8178b445729b8f4557888b3ad57c34b588240bc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJE2513966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3609d0426c4939e8285f242740a580a55a45a3dbd14fe63b0382ad23cb3cb038. 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/TCAJE2514062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18ed2c2543d758c70f2805171ec03d50f7707e6c82078f9b1c32e1d1877698e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAJE2514114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb586203ae852ce2c9103f20cba6e8610619e3db576594a00275068b4566afc59. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2514211.