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 0x66330249d7bae542d1af581ed135932abdc487def6f8678fe9f71af230ce83c5. 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/ab318f5e-4383-4a46-8393-a43e2d472355.json and https://artists.proofprofile.net/proofs/artist/ab318f5e-4383-4a46-8393-a43e2d472355.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 0xd0d18df7299386a33c94899aa10d202a673a04440bc3254635201d49bd26ce92. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBBFL2401351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b5d6425289f933aaf191030f852f00af0224f98c41d08219a822d24c3f59f. 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/GBBFL2401350.
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 0xa0b6edf8654b40cbb690486db58bf4388b3c39f91c037acb78fb5bec92a5c96d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBBFL2401354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1349d40b56a18f449e298d03648f2b11e46a8b3d0ebcd2621b9f4884bd5b8bf. 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/QZWDD2374187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fe7089e1d98141e7817ef3258ccb232a4c864361288a23cbb436e75f724b9c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTPX2387084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff37788f1e83f1b3421e72ad1b363f0aed000d1afff8af656732d5e1bf62cfe. 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/GBVVQ2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218609851712b4fe2f326c7d45680ae069d7eefcdd37d802616cca6dc8ac8d2d. 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/GBVVQ2300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d65e19316eb7727cf099ce52f8648861b16c79e364aa2c062cbded5068eb86. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBVVQ2300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56e0b6281c9dd80f4ab195a42247225b4b65bc23076ca81602d2e9895f2a97. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBVVQ2300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6397494a2ad829d16b3eab0814265d8c8de2ad6d106ed9b6b1ad1658790a19c. 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/GBVVQ2300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaeba3010b8ee5df19102df546e793bbbbe1e778d1d852db5164156c4d2ae11. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JMI012100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a68f38fa994556feac1145e93f3774651014359f5dc6815b8939afee5fd880. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JMI012100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4af82a2a6bb34abaffa149184fc1419919ae2c49bea5bde2cb628446e11888. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEZ2014210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3bf9ee274e74337ec455e661ccb03deb766a5f32d3166c6cb4786698a7c3c2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JMI012100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba291a9328480a54b0bdf4ba70d92839874e48ba548457045f1e707108f71b9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UKT5Q2090000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73e19d2feecef425224a16f005c30e0dc8f91a5c1b4cb8081752dbb28257f20. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JMI012100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1726ec31ed37090619de6dfc6f91e348a824293abfa70bcf5764e3632e1b8c01. 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/JMI012100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda8348875d3ae2572b19ad0686131371e3601c78f1fc206b402f14f3dbd9953. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JMI012100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19275bd99b7afcfe685201c96ac21c533754daa619edfdff9ee4d360c6c4d149. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JMI012100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb0ef2bdbb52256fc95835b3056cd549ac84b79bc54fa3112c406d5b7a14c1. 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/JMI012100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88057f092d042fc5f713fcdfef4100e52444a18828776f80926a3fd0c31ffc93. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JMI372000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db7c8ee43be4602baedfd0c69ed39900130c744fecc0935b873de6f491096e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JMI012100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835b8dd8837653c43ca361ab3580c2223c63dbb4adf0dfc72a351f372b8cc2a. 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/GBBFL1700601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12d7933088139d01a1018e4b5c2d32a79e308ddd003deb05b9f2effb6db6de. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBBFL1700602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2053b540e6e912ae0cc5b1b9dabb9306e50efe6cc1221a56a3e34c87e24f5. 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/GBBFL1700603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782806cd433d54f5e1061d7d71041e270c3cbb43a4d71b0fdc3dcdd3c6d473ad. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBFL1700604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d28a3aa07fc5d580a9877af19ddfb69e152b8c7d33183c4e81c2610bb08963c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBBFL1700605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92bf77b07cab871bd6ccf1daceaa1588c5890eee7e512f0c334b88e299042e3. 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/GBBFL1700606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ada888dc5e3da6c79740457e429f22deb0b6351739747e317088cec47c7d106. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBBFL1700609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d31adc6905916a69dda2c4313e46320a94f0fcf28a687f416b6b1fcdda7797d. 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/JMA271400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb39e9ef47ed44e08a372341bc06ef558b16955eade68654cd4efea8c429ece. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JMA271400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab8f9d72084da449c130d66eabacf68f50e931c937f204ae3ee5244c0b9f545. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JMA271400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bfa0ef5beb666553e5920930d978b6b619ae7199b2fba262de3e737e4d8c25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2361396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861c39d7ea46864853a64588d62969f4e072d2b20943e2af19af258094b6800c. 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/DGA0H2336891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e371716964945dd00a616a44c20066b58077ea98e25e9914f67e16fef89c2a4. 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/QZMEN2112799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a5f898c4bb2c2fea1af2f80a0cf9cfcf8ea074b7f732f237dd854a6a6ece37. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBZXB2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8889d65782cdf2ff8343398b23f4840a8e62908c47e1f7b38ac03602251f6ce. 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/USA2P2240454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6a63e22485b2a1f3fea7784a304493c750c5b1a679327d0350c0ab451aa6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGD2281175.