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 0xf27bd5d93c51d6d5a2b9388b7e69ec82b5ea26d07ca82ee24595765350685fca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c25bbcdb-fead-4cfa-a67f-16947f14a363.json and https://artists.proofprofile.net/proofs/artist/c25bbcdb-fead-4cfa-a67f-16947f14a363.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 0xc88f729d8ae24c184859d9ec6dc45b1dcc4cd86996efd87b452262547580f1ff. 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/NLT2H2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adbc0b07504c0fd3de92ce6579214e7412ff58ad72a8a6efdc791b7e81cbdaf. 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/QZK6M2277173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2384196df4b0840acdd1eef5a4ab1408ca24e6dcecce345d0599d308f4a3909. 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/QZFZ22272767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d571fa62a85db71911afd09042831393bcd68385a7d095f1828b4f87072894. 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/NLT2H2400644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256e89ff6d84cf053dae96ab205480b57dd4cccd018f90e95bfad1c06a5de19e. 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/NL9KQ2390349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2b2686e85d1bf7329b56dcc80836881a748e6eb2e6fe29c1b2947330fb34f4. 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/NL8NY2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620f9f9d57c53d79de5c67a49edde810f4555cff3748c8070829f132c9c71696. 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/NL8NY2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c9bce6131b0315590d30c225ace2c4d1eecd9b47034b10aa7ddbed58454f0d. 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/NLZ542302043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1173580785ab6bebf4f8f6ca85c10a7b25bc1e26c40db1a8c9e31f709915e3bd. 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/NL5WB2300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b156e2e5b7bd281a7aa3e59042be8f7712cd3e710f4a3f6bf34a406ac372114. 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/DGA072333248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be12e2c834d5ebd89e7eeacc2af4ab147c267ea9287327d915460a9ae26a14d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DGA052396791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5376156f1bacf45797cddf30802f0c6ffde9c7523982663274386b61f3dc86. 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/QM6P42373957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d68aebf8f9707506909b2612917f28a73605970b1da014b8af1144d15184cb1. 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/GX8LE2394326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e4c3d65813cdda522f8c82c807ac251f331a1feb9a161b47d2d32d4aa51b3. 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/GX8LE2342901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6545a4e40d7340e11493a3b31c05a40800c3d4bf04e2c6b7232a040211a889c. 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/NL5WB2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6fe9e15de779f01de1dda178392ef83c78a7f262e87c92a92cdfc8b2d5ebc9. 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/GX8LD2333157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0918aed7d2a1f6a6d206bc57e4f70e698d5117ceff3b19b69d85f97f85a7a2. 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/GX8KD2361538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094e5b69d0dbf92a60501e2457796f3c002d9da17b56fdd62d9ca104074924d1. 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/QZTB32210953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e04f2c78067cc9dc2fe9fdf73a96a72f895440a9790e40f5429c2cba82246a. 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/QMBZ92290100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91265d1774fa105d129f219ce722b459be00aa8b75b532b7b039c398366ff110. 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/USA2P2233114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110aef8a23f184f55ae68022b4e15ecc901a3397b16acdef58b81942332d4293. 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/QZMEP2222803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4d25e6d2931fbfe9e84360069142fc14a9c5f4a803f10e843919c7fe2ec9f. 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/QZK6K2204048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84b0e72d48cb824203ca5147646b356f705a6107303ebd1bfca22f4244a2e46. 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/USA2P2200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c83c34f38405c1573e60dca1720f3af1c9246e2e1f781bd31ba0f3258a31219. 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/QM6MZ2217911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41036e499b45720024fb069ba299ae5b193b8da7cf66dbc06bba122238730e0. 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/QZES92223631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96c51636e0dbf6e05334024019d0902ca3be1f1429a5511d9f819e92b844ffd. 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/QZPLS2152217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc770e72d0894f2a5530be652b97d6bfff1050ed33fb3dad7f41f6164bc9366b7. 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/QZNWU2122001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e3b493d8fa8176f3df3b7c04c3956535288ffe1907974e2b478480f2975fca. 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/QZK6G2128685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a03b9380f609f13477562b313f51ed38b388d383fb0792ee319c4715cfcca4. 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/QZK6J2105242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1165eeba74a75b3b0e6799755c3bb73c278f349dd553d5a4e5f6d8a6913cc6c2. 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/QZP7F2126273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4023a25ed1c4aa9962153571318ecfef34b98514296b2dbc4c04c65ca13ba0. 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/USA2P2101215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6924c46eeed7aa1b91afc23f0036f06b16e77ffb25f7030d3c9a6b294780d392. 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/NL9KQ2590720.