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 0xbf279317f5e60dff8351fe072d4f30add3233f255d4e9f8bb3924102a5907343. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69652da9-93af-4dc1-b1cc-69308928d4b2.json and https://artists.proofprofile.net/proofs/artist/69652da9-93af-4dc1-b1cc-69308928d4b2.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 0x0998ed67625dad2d57249faa8ba7b6ae06c21da4130819874cbcd2461b1dc000. 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/USHM92139862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1095a3111ed07052ab195233fe0fa765cfaab9aacafbe66f78772c6724727. 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/USHM92139864.
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 0x33bbc574c0499e4092bdffe48113fe9ac16744f460b0dbdf43a4a8dc8866aeaf. 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/USHM81629624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494b7c789de15be0a062e49fe8828ae1fa1745374fc6ad0eb136c73a99e046f6. 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/USHM81629626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888c301cfd29da307c06fd93cc4aed6f74a6d036ee33f96eedeca62ca99d7340. 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/USHM81629628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3213d4cab5dcc97484b9d547918af0d6f0f753dcb0dce15941633f45ff601b39. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USHM81629623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a956cd16372dcf876b572ff154226aeffedf72ac3cad4f651c1bc5d3d3d88ea. 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/USJZZ0500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ff6f54eaa2bfea50515c463c4da4c671f4831d1396f575531ba74817977dc. 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/USJZZ0500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489002b8d91c313b7f70bd0e4641a79cf0996f7426079e2af021d2a564a0421b. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USJZZ0500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9fd2e593a4eed4092ac8a6646fc5fad962bf5e341b7a1ecb370f331b4b65a6. 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/USJZZ0500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7aa4be1e4bd5c605a5e6722abd62ce224104a5f756dffee7465ae84451261e. 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/USAT20180154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7dd7958c2debd49bfc94a4f238db7748d7d1f74022598e108e938cc8cbb6d5. 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/USAT20180157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd254aa25c0aa3ef7b98ee1bad1669632c2221474ba7d017bb60c4e0fb21e2ff. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USAT20180150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2410ca5a343c097c0e6a748366bea1c64ae5990641298fe64759b9c815a091b. 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/USAT20180151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77db57b332e1b069b1876cd9a7f9a7de48fc33ad1fea1160b1fcb9623bf48448. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USAT20180152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc324e4798e5511ccb4ce9b76fc871d24d47c30d332a9473315c82ec31bbde. 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/USAT20180153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d752f62578c4a21b0a9fa7eb18684948e636c5543244943c18a65933eea2be. 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/USEE10250634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8302380617e7cede8ecb2b3ff4c16e1aa9073d40c8b69035dc6d5b3868bed477. 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/USWR30200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c3f28b7634a9e543ab715033fada8bff804bd6a0e9e1599fb84f934137d2a. 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/USWR30200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38b413a085a09f901c164579450a2fb5b7674e84a411d06f5ad29b41ebb2096. 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/USWR30200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01fff4aebe8e53b62c2b43c61597b8aacf4c4eb79d124bf273128ce42384ecb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USWR30200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2d4a78e565cc250373f59601b0a5026d5acf5f4528667d39857dc52bb3b630. 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/USWR30200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd572aae07aded4eea8b8ca4ca64c0b0b3b83840bb795f1854b6e43c4445dcf. 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/USA560568238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0f9226f35ae777c05f849396c84400fdea5ba95b40c6a4dc9c90b45d983f6. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/USA560568240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a89a35d3c6a87c5d5d61e89515db555f1cbf06a11083081bea6e49e86a7c66. 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/USA560568241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8410fcb25eedbfc39d5d484e644d4118e6d72359f42696aeb96d0b4d94f3b4e9. 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/USA560568243.