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 0x585b3c67330b2cfd05d039ffec7f0c747d50dc74990c5069e4a552ecb602db1c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37d0e070-0654-40e8-a305-af0015b3bf4e.json and https://artists.proofprofile.net/proofs/artist/37d0e070-0654-40e8-a305-af0015b3bf4e.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 0x565cc4fa261b6f0323a763825b8653dba84cff20640108d1046f459107aa91a4. 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/GXB8M2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c6c449d03ecf144851f28a43c9c3eac67d2cb7e4dcf3d2adfcd570d641f81a. 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/GXB8M2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86996dc286f26fb245e4748fe6d3796da4a55baf3403c257cfad1ac4da7b453b. 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/GXB8M2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f3b02ad6f8a58cf5aedd591d593b6ae1a8076c96dc4f33fc3f3561bb27f61. 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/GXB8M2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f7330b40f54db0fcacdccada441ccde964b2b95a9277e07f72bd483fb98fc2. 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/GBMLT1501519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fca5e8ed61b16b8a16ee3aa0fff720069654cfa2ef41feafa1b3db967b7563. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMLT1501379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b1cc4c128f7d188d258b0323e719cbacdb9e44d3bc31f97833eda98a365f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMLT1501380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfdb72a3176c0fc20952296a5c55464188c9250f8dda919d2c651b396fbc2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMLT1501381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac97b54bad741717e0fb0879ff09333a2d0a1e1282a15b8137c4fbe45768481c. 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/GBMLT1501382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec357c084c8d716438091fa76a61d1c18ab8f9411cb48061f81477ee66c2229. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMLT1501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a698c67990f9fcd0bcdcfc8e9895248752342c936bbcbd8c81805995bbb1db. 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/GBMLT1501274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1bd3c80e8984869e2385ab6b27e6cfe8f3d81a3cab48e0eb867e9e7a60139b. 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/GBMLT1501275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1cb86ce08c17835c5ed58e519ca9f82bf942b4e754a6eeb36d3a350cbc4216. 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/GBMLT1501276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c560c2e5ed671322397d50475eed4e52abbfff696665b2af167e46462f86da. 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/GBMLT1501277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc56301d6c69604dde39cce30b9ab73c01369a9b3f211752b0634332a12b5f12. 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/GBMLT1501278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8527ef8fbb45b2ba6a0771960e4c7e6e1c236b61ead00cf58bd1d267dabc6a. 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/GBMLT1501279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14d70d29272cca69b91d91c880585665f7a60ae292e5e867c562a98336b4099. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBMLT1501280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9abafc0086decd4cfc8fd14733c24a731ca9099d69d7de44b5a729c1a2811c. 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/GXB8M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef0453821b95ef7ddd63ae41d0cff8180614af66f3b7a13d98d5e78df56056b. 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/GXB8M2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438cf362fb72c6b543dc1d8fc1a44b6ab146f1872afd1852c352e3c8d75fbee2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GXB8M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070770d338fdfa28f7e5f0635b36fe513ee692f39005446d0986b0bfe56e8409. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GXB8M2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86996dc286f26fb245e4748fe6d3796da4a55baf3403c257cfad1ac4da7b453b. 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/GXB8M2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a6ff28668b11eca99dd134dd999fa0f5a11d849cae7cbdb0fcc73137cd4a1. 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/QZ22D2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba1d9c9f2bc07cf840c0f37f993eef31b8af4e6240212803fa9672bc6a70cb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USERN1010797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abbfa229c9b74f0bbf5b40d85310377ff85afb729f23d672d5a9c4b1cfda3bc. 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/GBMLT1500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffeea106ea07e7463fdec56fab73e7f71f932e84fce72362c4e01adeb3cff7. 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/GBMLT1500867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d793e44e80b56325fe66600e26657814f324f34dd9f27ca181b0d4c7d5c33. 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/GBMLT1500868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460bf89669dcb86d08e3113e7b5480ccdf6e8e43b7fc20348b73758f6e8266c1. 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/GBMLT1500869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a6ff28668b11eca99dd134dd999fa0f5a11d849cae7cbdb0fcc73137cd4a1. 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/QZ22D2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f33646ad8b4f5ef521204d523d55354013dcc3f3f865304499f6d902db2902f. 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/QZ22D2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34b7aa445c578bd64e0e3baa6ac3552255700855012540cd5798e2032379d7a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ22D2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a55338b716f7a87b100911b9199883117197018c0d78df33e1b7a060d963c4. 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/QZ22D2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a40a7698c4b84f3cd1f4e562b2c1ecc3124ac04bbb41142a158f1c4a11324a. 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/QZ22D2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a8198ba41d5ffaf5c520221dd2f64320a5e7de905b8cb91495de7e27933cdc. 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/QZ22D2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b68b6ff3a35181a800fe8c422a46fdf6cdc13fdf496df706c30ceff81baad2. 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/QZ22D2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba91f6518ff7b70757f39dbb8ad39898e8bcefc492260b4b2197d6dadcc9a0fe. 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/QZ22D2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc558e0f28a07bf1e880137613cfd7b9732ec18c882149c85df35671336eb947b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ22D2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba91f6518ff7b70757f39dbb8ad39898e8bcefc492260b4b2197d6dadcc9a0fe. 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/QZ22D2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f33646ad8b4f5ef521204d523d55354013dcc3f3f865304499f6d902db2902f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZ22D2400028.