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 0xefbb0d35e9cc708c60f423d0e5c60c4959570d4ceab3708eecdd4d52186c8e9b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/502a39c4-4cf1-4aa4-8822-ed3cd644eb61.json and https://artists.proofprofile.net/proofs/artist/502a39c4-4cf1-4aa4-8822-ed3cd644eb61.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 0xbf0b2ccea35181ebce8016963d1cbb5f3342fb86f8c3645bef457e7597a932c7. 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/NOHLX1757120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a13e2a3f432f5d0672332d7129483ec334a14e71c20bfd36d5b8aa3bdd1dd51. 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/NOHLX1757130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56471398427d8da3cd8c13e334b2242e9f9c71bb30e5927d4bd25a560a5c94. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NOHLX1757140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd419e4fef833fb433c66261efc157b4ec22de212c8f35c4d00e594b459e4dab8. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NOHLX1757170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c9bf03d87833d9d27591695a5181fb0666b3eb180ac272c639b2f44805d04. 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/NONFM1602203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be95b317eaa81035bba1cd6b22923478bc5ffb857b0ec9d64179c67c04fe70. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOUWG1703011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255936469678ca2398fc0fe17620c1532f3037ef4eed76488d7a09d15578e282. 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/NOUWG1501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c189de854c4e8469df708f77afdb0e0835d5a485e9b5eb9a848ee9c5dae828. 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/NOUWG1704011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287fbe507630786a3c666647fbb2c12cd1094c49e33461c61d883151f725347. 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/NOUWG1705011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30656f790ef4b4c8f13c59f4d91f06eaf3d648e4a1e2370c00dca4dcbf23bee. 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/NOUWG1706011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6771e1110944960a0a3d09bf7cdf6fd18ef39a35cca6e8ffc6c0addfe9628. 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/NOUWG1707011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18e11f640918ed5f8fffd4ccdde63b997d3309895f1991928ff92a0d8b1b39c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOUWG1708011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16076d299e7a5222072f76919d176d2fe0d478a65ba1df34300d81a080fc5fe. 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/NOUWG1709011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde75f5445187da0baef16f2461a57445e08b0217c34c38ecf0118897d4115259. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOUWG1712011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139b226a02da008add5cdc4c69f981c4e755c0092fe58f456dc1aa60a06afa7f. 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/NOUWG1710011.
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 0xd97d80169978d7305ed60a4b7c2e79e398948845e75a8951ac4bce5fd741ec82. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NOUWG1711011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1aad69feea2929c84dbe3f3c78f1e04392f9a3bc99b5f3c09fa1b20e6c96f. 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/NOUWG1713011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5992864aa626be5378a804f231f70ee8949ff714fe4ada46d7f109fcb48e7b. 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/NOUWG1714011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac0148f04daad6c04bd603f4b44cc3e2b0eed27bfb42e522c63c63e74b450a0. 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/NOUWG1715011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ffc346e89719d56372c2cd8e3f522e87186e16c52be3402dd6b49d541ec594. 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/NOUWG1501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137520a9a297e35cc0df68c3f0bf18eb4bf81b6de253354a4787e954870a9756. 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/NOUWG1501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6c7e7acf29b0c70dd81ce78f0f8aed44d564fbd582cbbf2f45c9e129331042. 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/QMPKX1508053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf605cc406575f965f8750367badd866466fc809f40ade2a784138410a9bbda1c. 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/QMPKX1508054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3d2563b7f1e22a931062136dc90ba21266f5ed749bf0fb1c5e4a1a33402718. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMPKX1508055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b02658c87c39b00d9bc61606e0f4fdb6ef22a56480e4254624621ca23bdbb7d. 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/NOFFM1945020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27492feba1ecbe88eed5696b5158459b59fec3a46d365c6c3addb999b8ed6419. 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/NOFFM1931010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbf6fe9e3cc363514d42b010ab5b1d40811fd50c061744bffba2aab34b2ded7. 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/NOHLX2340080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adeb16706b25de9a798675fdb1bb91bf40721edcaa3aa737ec4b52c880fb03a. 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/NOHLX1314060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a18104fe685a23b46e570d887503a3b1ddca4a5981602d9ed9016b68410f220. 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/NOHLX1314160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa776c7b4b8087d5724a3a8eb98222265fdf07ef0afbfbc0729ac82daf32d17e3. 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/NOHLX1314190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6eaaf0cc0553340a68b44db3eecd09136737778327d6df6d60551bef41dfc. 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/NOHLX1314050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea4b78a9a2a2b76136919871baa6af8dae3606275a3ec807ec5f9b60da2703. 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/NOHLX1420260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f7b4abe75a046d2bffeeb1171550821d19b8b29465653f9c46d83c11f64a00. 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/NOHLX1420131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a9012cda1d03ad03cfc2ed57d48908c6974548e15eb712417360af93a778d. 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/NOHLX1420020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577b71118d8789aab5daed522d95f609721710453fa9c51f68e7a6966e29353e. 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/NOMKT1601050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28700b27212c3d8bf22cee06e3dd848ac737c5e87a670c8f6796192f2c836b7. 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/NOMKT1601090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8642ed8b5bd3f54ac4374ab85c05218e8c24b1d13ab1d56d6befc7b81f89d70. 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/NOMKT1601040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713f504fdd7f4afce4a86d71ebcbdddfe94de6a031e79ed7809b69aa53b1b04c. 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/NOWAT1304051.