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 0x46f8c89ff477c290293e8895090fcc112f541fd2f1ee8df45bd8713f1d33be62. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9e681c8-19fc-4639-99c7-e40ebab0a9ac.json and https://artists.proofprofile.net/proofs/artist/d9e681c8-19fc-4639-99c7-e40ebab0a9ac.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 0x5ba5e362ae8145966f7a6e4a87f2b5ef5c3c61822cae6cf2d172ecf60307b146. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM82325571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a3a4cfcea3e16dfc95f11698278750b03ac1cc700e88a8d098b5d71d50a50. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:34Z), 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/USHM82325572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdd0a3788b96ceb8d7569d37bdabde251571c4e552faf4aa73d7e49e685124a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM82325573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae220a4d6c008c05f6dfa246a305bb14d812d1083bc14eea2a1b9a27795fd0b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM82325575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22edb094523bba0f522b169d458d6c3a24757739b07bfc9f9d97c0340eea6f7c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:44Z), 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/USHM82325568.
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 0x6317aa2989801cd2f286e142bc22174ba35431ef49ee6b34d276a78f3248e8ec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USHM82325570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c62efb964f2a8786152a3b0f863790ecce2f110b0cd6c084b42a16490c0cb. 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/USHM82325569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa6a49cc8248a5379342693be3ac3a75f5f525a289b496e19b16a2f7c28c187. 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/USHM82325574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4ba5e5d7a83c007d984766e4dc415c03539e6038068e065c5359a596c8b2ca. 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/USDY42218085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1017dd10d6a2f500a770a79da15242f09acf7780b7a13fa32bfbb877a827fc5f. 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/USDY42218086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e98281b86618aa2898640651ab2f31a675916c0b95f296635c27484e99c185. 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/USDY42218088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f4baf764a65b187a4265c33c13d37197f20258e0e3dce6a1f868db7b861fc6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USDY42218087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11213b9e60e99cd313dab8bd33708445eb5c182f146b18e30dd644fdf231963b. 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/USDY42218089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f76b3fb5725dbd8304f36fce59faf3476efb5cded6bf4d3735f4993d3be61e. 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/USDY42218090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21921eaddcfa4a5ff3a7bf9b5771c6fcc78de1303bf51994b5a125502a538631. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDY42218091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce5cba75829a06eff5f766dc17eab0b7f9ac92b8d7d8146ec8b7197765dcee. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY42218092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f25834ff119ebe28de2dfdd913f779be79f15c644662141ccdd315bb1a1b1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM82116072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654171a15660124b312a8f963327cfd424beb10cca5f0b4eae4628bc5500510f. 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/USHM82116074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeaa6817beac895367134eaba785e991f3ddd8044278dc46ad8c893857b8bb3. 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/USHM82116076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f719ae0c6411cedf8399077571282e7dd8feed3766592d302af6471bf5db29. 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/USHM82116077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d1b1b344e3a0ae29ca43c65d9de34517b610660863c5e14c0b2705cfaf8602. 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/USHM82116078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e5cb199cc9e2d49b9dbb14df64b1d457bb0bad2133c79dc5c2c6c93f5debc0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USHM82116071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276cdddf67c44c400588922fe289b21771e0eb296b3d0ed570aa4038c49fc3f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM82116075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfb4f7d01cae363d4e7490091a44a56cdb15de0643a54e44c8e3450f4ed9bac. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM82116079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea720cfd4aca48a5af1143f6d91c297876daa8c6290dd58a4ba95d8c22b63d3e. 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/QZHN32133149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674cb736e168a430ae7294e22392ba006fc2ecb87d9f4f7752d432b8483d4cb0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN32133151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479d60c228d0a36dedcbec307975cf3803e84c44099f430514ca86229d2e0be. 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/QZHN32133153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51978e839a89b97ec650b31f11166d2e72c142737c8617aafb709b8a27fcc5a. 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/QZHN32133155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef081a0f0bf8becf7d9366a21f6f28d892794fb2b2a1cd9a34e7838f72398b7. 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/QZHN32133150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24da13ca0317ffb902d6c61ad11f30f37d27c9e385205c566af574183f50365c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHN32133152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b400619c7c459cb9ecba4e389c51a85dd2e1f3e503c97554577e4bf064cb00. 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/QZHN32133154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa004f5772db567bffab880584149f2590cd7a80acac74fb5e5905c76db675130. 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/QZDA62175524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ee5c7dfdafd41485f8007980ea8c2aa77596807731b0b3e54665040b347537. 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/QZDA62175525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5e2117d1baf0369ad344cb13ff8c5df248e2586d6fc8121373672719d7b24e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZDA62175526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732ab90a78c11178e122aaeb8225cf81a046dc47fc8887442a26ad6bd6efec11. 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/QZDA62175527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba9f3f8c28a132a981d0f59ac44c949ac83f06f789dcedc0125cf3cb4a88f82. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZDA62175528.