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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8423c0e29893676c5bc9f26bfee0d0fb58e1c92e7a30e1ed00045fde2788755e. 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/93dc25f6-f06e-4210-812e-564fbb3c81d1.json and https://artists.proofprofile.net/proofs/artist/93dc25f6-f06e-4210-812e-564fbb3c81d1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38c9511be841f2a2972934812e5e2cfa13c68d7c3a86a44cdc1e9d19f21103a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPR501615978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499a7447c45f1a59488809ff4cc3fa1dbd8229cae9a491894cbe9864990c652b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPR501615980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c91d35983bc34ceb9e5e6a0cee7f64d147f8491d654d79d307e5d6879b098cf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPR501615983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff1e54ef6443e3de59f2586047aa93cabac5a03ebbb9597f41d7c8e0c990be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPWP00401154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34154f793f44857c55cc50627a14307d10ab416b49f0fc4d4e0066c3c4c04a6f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPWP00401156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5bcb8224689af1607e354bf51180682606df9e4352c1662a5b3f85b464735. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPWP00401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697f03f981e4164b63dab8abd5a9401cd68680c4b0ad3c81b945527b602676d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPWP00401161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037d95da1d224594e54aa2c6b34d27ace40babf0e81cece0da8929df67e9be98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPWP00401162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2990e5305b4ad1c8d1ae694113da1ff639604a52ae87a28a6e0ff6f7f0fd773. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPWP00401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e4650ecc7e5351b71c690d37cee0ff2b241d889486e3b7aa23506171d80d28. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPAM00300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d2298631baee6b7b60139988d00e6bc99a688278d1551f5ab4bbcc09ee882. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/JPAM00300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c5463689b3054a4ab295be8fd09fe45ebb281dce52df270d6903b88eea6dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPAM00300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbc642cf90b1ddc1337d7a942ca279f29b041e4477ccda42ec93000f51c1b25. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPAM00201640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff91ba980c65927918af1ae5612ca9f1ae6178f63b1072be8d728dab006014d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPR500801165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a7d25e0852f75c60269c648682a3a07027bac4bcd5c7121fca6ea02fe05c3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPR500801185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cd9529cc800786ca75c2cd2a03ecc862714d8313e28855399e4f33fa1c3783. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPCO00126890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a900b0abea5491dba1485d1ee9473095788e248c7b5a3d786eb4c903969169. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPCO00114091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095f12280d98ec203801a847ba761387815653ab4180c74a9a668b09a39f30fc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPCO00126870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d04891a9dd17f90528278f09dc6f320ff681f2e8ffedd2c0203393deef8d5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPCO00126920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eddc27c425d00ae295731628c194092c6db916f8176646a737105c70d65f440. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00126900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fcf1abcad710c9b91095063c50f87bff28460232bc12dffb9dda0522bbd9c2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPCO00126950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3572ddd2671493e419840359204371ab264be621859537dc979384a703a05f61. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPCO00126940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb08f6e245b2d47bf303d7181edd0f38d293061a1a9a3c4aa641017af4f380c3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPCO00201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340284eb6a9f7cf0e693cf411885964c2b0465924114371f511df6b0dea72ca8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPCO00201280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b293828c7c88945e585232fd4939baa092dca088886833c122bd68f0ad7a66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPCO00114090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3e189b7ac98778d991d2b4c1cc9ec748e4a6ff2b834ef63e07883bb7d4bbf4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPCO00114080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f1c8b6dd29c24c96b8a55e73dda7ccb6a2f2d205e4fc848bb703db12af3cb3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6R21318891.