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 0x3f05111251b2696f9a0a781d49f7cc9e5f67644519e36acfc976d5c25fec6f20. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4a1af93-fe0b-47ae-83ac-f6b787c86515.json and https://artists.proofprofile.net/proofs/artist/c4a1af93-fe0b-47ae-83ac-f6b787c86515.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 0x0b6f7ad296a2151ef4101954003a237b082b3a24bfc433e61fba8ddffe66846e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USHTV1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf13b45f09be0be12517a8bfc8c73eaf5a72448651006e0ce2e2fff74f2a1ce. 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/USHTV1200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ec2600906416919836c024a5f933a2774bba17d4c1551e768f3793c446ef90. 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/USHTV1200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30233614daa28b59b160b7ffdf562171da5a6ca84e6f58d9b5912f3ad1f2b436. 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/USHTV1200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6b534ede55f84a169f9ad57a03abaa95d4a0915f24f15c2b2a407eda0df4b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHTV1200016.
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 0x1e0824a22248eacdc3f4b5093333080fd5fe0ebd27ab9d29a9b8bfd6d0f170f4. 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/USHTV1200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1619e7741c4dd8bf017de977a142b08e60aac31af8df21fc291bb6c42430f. 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/USHTV1200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9591ac6a7504780c1d5d16effa7889e50983efcffe3fb31a785ec63a71d7b8. 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/USHTV1200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e659d840758fde9a798d56d08b4774733023983de0115802d7f3d051522fc2. 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/USHTV1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89802e46c3baa9f176ad57a3b49728dc3eeb6d59ca25578708d83753ceb2994b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHTV1200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51606e65f1c88bbc1e2d6bd04726ea26a76e052e0a95fdfbcc295760009b8639. 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/USHTV0910299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7210256caa85da0fce08c7ea6a29a91164e05cf8f7914a7dc3df0c27e9c251. 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/USHTV0910300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64d13a0264b58ea701a0ec36d738da151823d5383b4b0101e5e952bde5be18a. 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/USHTV0910302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e396fed0d601d91844a897ac1a15ad837a8a2a6a016410408f3929fcdfc50e3. 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/USHTV0910303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d22756a0b17f467b215b4b4af4f874b2f33764b7b0d962945616e712207622. 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/USHTV0910304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33423bebc78e630e7f3c57b4752acdc5d3714a3eb1ae749b39477d82b2feb51. 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/USHTV0910305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821f1abbd57d83b7bab7ab280b2bfe6845e72cd499699a18a9c3adaa15f8d34d. 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/USHTV0910308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c16f469796ea26e39f2359160f7cc852deb908408ede9789c1438b08421fa5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHTV0910301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448dc22185fba5c0b6b02b439afaef1a0dd92f8e6e563d2a03b564cf84c95c4b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHTV0910306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb719c21a06e4c33ce772fa5af17c4d2a7d488ab3bfe2c7efef3355b3ab48f2. 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/USHTV0910307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3dbd664c505cf87a61b929ab93a85a94310facb89f0721105a7f7d821ce225. 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/TCAEC1926598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11031caf584e40372cece3a8cb766b1575167a1a5be6ab8e7edcf34c6d49dfc. 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/TCAEC1926600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf72fdf2c22136f686fec2650970125e1753c59b06ec65050882ce9a68ec098f. 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/TCAEC1926602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e16533208438c4c92e0b2f4912c8e9c8c1c9d34b7e75f1fa923eb5e973346. 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/TCAEC1926604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57572710244aaa345319b05581fa3c534dc795915434e28246bb822618185588. 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/TCAEC1926606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7733666e14421006252d0412699bff841111628850457de9c920f089d5e4af73. 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/TCAEC1926607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4f9b75dc663a2c441ed9b18c5cde2bf68021d3d7f77459d3a4e9af9f4d5e3. 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/TCAEC1926609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115b1c51fc8a538783802228c281263c7c2adcdbf4be4883e27fd8008bc0035. 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/TCAEC1926610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d553362ee0859b3320a85c85c323ce504084dcfd4b563a1889bdf31274b4b4. 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/TCAEC1926611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724339d23e6303bfe5487fd3eef12645ce990da7cbc9a57244cd48174c95687c. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/TCAEC1926612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ac0068a78409f125ce74a74cffd8181789dbfbc9f224ce02b30073dd05381. 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/USHTV1100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1dcb695d3401664e4f7113bff4758b375888560ef921529ae0398609713240. 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/USHTV1100574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee30dd86a4d63a2c3d60408c7a17eaa5a94a5a011909798ec1f996d7156ffa. 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/USHTV1100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da601794e836558b0cd4a7344571addf12b8bd6cb3bed70bd7dac06b326ece. 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/USHTV1100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38973ca5af717d40ebc9dd69663275135bf9bb8b16e6a686d2861fc3aa9cea97. 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/USHTV1100570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cff95f7c4a701eca935699abab59c72bcce0cbc8ca6517398485d3d4a984b1. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USHTV1100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e734e5e3df4575a2e65d0494960bc8838b87e894ac69a1f40e32fc3eed7e92. 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/USHTV1100572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921118f78e0941d415dfd52191789ab7acd93f6ff855fefba65e40a4f4579409. 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/USHTV1100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ae17bad86e5ce7a035a692f4e813497e28f5f30ec0d89a1b6be4bbca5cc9d. 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/USHTV1100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e3b1c928749c399d7568336810b89074d73d99591a24cabc52151c339d3e6. 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/USHTV1100578.