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 0x9a658ff8e326fc2929629545e108af2c8743257a7e1c6cd5e498d1299b988032. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3501d2bc-8ee0-4565-8e6f-ae9f589bd1cb.json and https://artists.proofprofile.net/proofs/artist/3501d2bc-8ee0-4565-8e6f-ae9f589bd1cb.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 0x1bf80a2a12d86ef462a3b1f9ee458e080a1df1caa00a6afae04207b284d6333b. 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/PLI363881030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe12d0a6e783234f626f1b7e55cda6b16563eff3bc2a8935fc00fc9b2ecce5. 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/PLI363881080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34adf9b2dd36b8c5f724577fa2a6bae5f6c933b3329568a653b87ec476ee67e6. 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/PLI363881091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6949fd3b7d831f038cee6f9040bf34236935f75d06be7a5815462417a0127c5. 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/PLI363881100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7813689ca6bc45433c95c6f01b6e1e046c400c452a93f63a386e67187141a374. 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/PLI363881110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d447a61b0badf01d5f378df4ea24e5c8c303bfe230d15eb054b67dbac43e39b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLI363881120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa901136b7749eea1b3e2091f97e4deaffa765660e27900c7d8a25145ce5aca23. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PLI363881020.
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 0x53262a0f438a81929308872f3dcadcc967fe9b53a4c2c55ebf4ff8345a80933c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/PLI363881040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e9243611c8b17deb4e2b0b5b3ce090c273e3d09b7c86904de6b4e0ea2804a0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/PLI363881050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b414183c9efa1159b1aa560a06d229c9748c030d3ccc4f3be0e7ddf2d94ddb. 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/PLI363881060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77331912e39c431235e906f03819da81b079e12ea68b66ea476ffad81cc7826c. 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/PLI363881070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016761737c1b1bf70a3f976647a13f69afcfa3d9395a79498bf90058b35ae420. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PLI363881130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25477862a2f963aa29f73b7a9f4711c3dabd628f3f84ac539e17b70c866108df. 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/PLI366683520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48134b4863a698cd124e71364f4d7cba500d56c5fa44f2426ab017a365bf62f0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLI366683540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6744953cc9375c885ad887bf2869967f894119dd1cb251cce91e60ed6468f8. 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/PLI366683550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca8dd828763d2fe249dae738b22b17fa4ed65eec4c862d074bdd32e90613b16. 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/PLI366683700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5077afbfd2482845cfbfb93481cfa694b351690a87eec349f9b4a3ed47a4d61. 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/PLI366683740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838b69b9a3b52df3e2f0b33ffd5a5c59f1e310c02f00ac934e73d19ed28748ca. 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/PLI366683720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890b770db2eeff674072d7091d1ec48b97f0d196d034685c467dd804b194734. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:49Z), 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/PLI366683670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26164007b048f962e10c11b695eb7253e1fd7b1af8f5fa07254ef1d6782fca9. 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/PLI366683500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b975b8a131622c15f9e6b1c9657b3be08af8b3089acb72155ce59d5705d245. 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/PLI366683510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc611b3ad286ae1e6f65fa257e98a8f7400ada308fe1294267c6e72a5f8960a52. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PLI366683530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28b74e3064b39d410f1aabbdfc70d4fbbcf90f741943b3a92dcbfda2ef9ef24. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/PLI366683560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6155265f48cc51c2105371f3131bf8c0fb5337f80153bb3b57ba42eee9f14fe8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PLI366683571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1461ec3f06bc0a56b6778a382ac177f9e8befee4acade5abd38eb46472c8e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/PLI366683620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ff1447ce0f74be146730235a8fde726a114366e84dc26ae132472d07d78cbf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PLI366683680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08739071f3816b5e94b5ea04a5547c6439986b9a3e2396a9aa9318d3e0598d8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLI366683710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eaf61ac73048b080f2feffd9cd702d27b8bd828ea4dd929240e18635ae3745. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PLI366683690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483aaa594a67f4ecb56dd79a1125d1f1e432f315e6da9f2dc36e275612351f85. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/PLI366683750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94de76487ce7f6516940fd473ecfb51b91f1cd5d6eef7afb7510fd62f6a37657. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PLI366683730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d3b8fd7165738fa931a44428088c5ee053e1b27d90838432a3fbb35c43fbe6. 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/PLI366526880.