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 0x561baaa2085ee5abb173ff712c369ca876c6ff7da09addd4364ee81516d400b4. 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/74f6227d-bcd6-4fcc-9a1a-22710f86f823.json and https://artists.proofprofile.net/proofs/artist/74f6227d-bcd6-4fcc-9a1a-22710f86f823.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 0x2c670dd99b316ccd271f30195874010c85d090868ae3e3f0f6d518fc60ab3241. 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/QZHN82136782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c779afe4831ecbf1a04ea4e5275e74297ecd94bbf471d070253a316ebea9a0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZHNA2141696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce107da1ea7922488d346ca9e0d2e677ef8848a219d99d78403840e0a52b337. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6N2190285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c2507021d13d96d7b4665f520f501c7016dbae4e1bb7405c248befcaaef85. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZK6H2127486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668de0dba269201c317544218f5f78c2f681930f20e0517c494172fd0871d67. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYX2213770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7ba23871ab009d7e195be56ad17efaccd5e661ac56c890d02436d76dbc654a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYX2213771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1e4372529f8b6a6322a54e37e73a0afaf3dbc6fa563d5661f230726b071bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYX2213772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a49954e36feb83d537004c65de28b1324e342f3a9fb8e9bd8a9255b0efd140a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZFZ72296888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d38e0e754f335f3205f78c7defc3455472add70df6d2dcb47b4c3363858229. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6F2286973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5850755eefb7c9055736f330f29cf27ce8c17055c6e8984bbc7a8e80e26fa2a3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6F2286974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab24a4c798edae1c1f975eccf246a1377ded2208efc725716d40d26d59a54254. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6F2286975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2acc26b40481a7e7dc649ea965fd786d7278dc75a7accd5ddc63a445f0894. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6F2286977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06c518737361c87ba288392997f251afa578f0108d95ee1b90830b3ac4636c5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB42276227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdb865bd5c9495d2a138a851abf09bf63259ee52405f8fb8e284661e93cbbe8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB42276228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc0835b0fa06459d3440a52f03c1f347d5a187df406fe1156d63b6f1224374c. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZFZ42396341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a22ffef9d0e2afa2d32b1b5da14e8eac30ee603a42d2b84aeaa6d78f3f6a52b. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ42396343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf74fd81ca479d07c09777038d39bc5dfc9430481fbf4ad68785feb38f6d9d. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZK6P2343437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f69dfb1e914ea907e2ada37074cd3facf4a55b218d65660892acfb82fca44. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNWV2333900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad3d335bfbe6fcb1cd2f47b5f755d6938988847e570599d221cf258c6d406c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWV2333902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97b6c9d2b90ea62b04544d56d3d8d4d47d6e397f5aaba99b20530c04f5fbd3e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2333903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e05ca6b01a6d19c86bf9a6eb7f61de26b344afacbc9e529dd3bbaa461cabe84. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWV2333905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c8079c27cce38f3211117b5a59ea3068bf45f1b98df938827fa6238694ba3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWV2333907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc477b5749cc5f1e2e18522b77c1b694dfc392b001da43cd3a8c1ddc36945719. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2333908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45a29ca8c52bb5e59a2d78a25f8a34fb7ad1efdd4b130385826c1ccf2ea37b4. 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/QZNWV2333910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a6bc7af31cd18e6599796de1d787d92eac2361591e9a8cc4070f4b9450bea6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2333911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75bcddec0edb53cf0cb3ab92ae4a0a27fe88daf8d5780b8229c478ffcc52ea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWV2333912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ad3bcc4b60034fce2c937b08dfe8d13ed210f583b089c404e0ed2b687d78eb. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZNWV2333914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ab1427981a359505cf4d08aef2ff69e30956fc21cd3edc4425c2b6cde3f29. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYY2460404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe122aa89a22cf4b5bfd3d6939026da04767c6307cc935c2b3d49efce0fe1171. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2460407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c426f40169dc8641d17b6b6c1154e8542c845a01208ca1030d863655eae1c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYY2457432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c51e098a5b121fbac4249e0e213642c55e080be70f4f6e04355bb06d04b3e2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYY2457434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0277cda9750e84c5291cb24a81cf519bef1be4c92d99f52428741f8ad28b0f4d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72438449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261d7ec1d7b541d3bf3e69bc562b8511533aae3d50f5b5b45b4fae664b1fd3b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZES72438450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3139b97035818aa33196690a50c969e6fbb4688571114da856609e3cceedaf. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZES72438452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29371b32d00614733939e511176872312268219f92db836c104f2add975b24. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWU2483842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ffe1a81075a828a2eb36329c0eb4294cb7600c4e98b45fb223901da4df3782. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWU2483843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf9150d057283034b7a7d531fe17ad79fb895267dfef33a26368ebd570334b5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNWU2483844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f8db3f597dba7d3b52c5d9f285a3dcabbbbad1118f310a0771a7b285c541cd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAY2591885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681f891248b4ea489cc836c0a178df4cb7fa75a06bd44a701b382b74e8d6554c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTAY2591886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6722063586b8b89a6da8bcc7b89e60ceee16406d2b87d263d8bbf284f84b688a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAY2591887.