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 0xa5654de1ad08ced7f13d6a544047d62a1402cc800a6cc4fb1ede386f23abbc37. 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/4ade773c-eead-4ce9-bbd4-1f984d16041b.json and https://artists.proofprofile.net/proofs/artist/4ade773c-eead-4ce9-bbd4-1f984d16041b.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 0x48e9e200443e2b723b2adda97ba660b1d9649a15123b29da05949d6f6ae6a70f. 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/QZHN82422581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8774c2e66664aa5581c20ad7480e071e9c29189fa7420b5becef2d297edbba. 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/QZHN82422582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc499a11eed92918c2dd4b5a0e28a86fc5f6e668c706294adf680966a5635425. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:23:14Z), 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/QZHN82422583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cdd68f7ce57b3587f44f07e6deacb058bceadb8156f73c5e373bc8d8c86cb1. 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/QZHN82422586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5020f8de001dd53ec18119f02fc830ce21cdb2dccfe9c2dc3688ab61bab692c9. 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/QZHN82422587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033b52784897f8ce2e263232fa30ae3ea229ceb2ff12d3efd0f8c141522c7bf. 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/QZES92347454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84678ba5d7ae0f943c95ca50593242c3e3c831a8848958ad85c1681323d956ae. 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/QZES92347455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281b1b87d6faeef73700e212374496f3c9d05aec8fd8711418785de6fffc2335. 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/QZES92347456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c5461a5de9a30bf4d5f48120fa0054eab4848f1fe7f26e62cc713f9f9f5686. 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/QZES92347458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a79cc7e1cd73d30211bf81b41d37c09abb392d62aac5d057095dd4c6b7ff3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:28:51Z), 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/QZES92347460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f49f02c72d394a35d86b8defba3323ef64ec9aab2c76c5e350d2ce788be6f77. 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/QZFZ72241519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb668269076b361c90e21f0c9684f6f944e02a05cd62a56514864f43142627bd3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZFZ72241525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4991f2515a459e495c6a65e5889e10092a91442eed1b32d9e950e126f2b4f2f2. 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/QZFZ72241526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd169275f971a9eed51a3035b3947ea64a29579f0c71a36df85f66d5ca33bef24. 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/QZNWV2150603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ec5c5d6fb8b332ca5dcc28e2fa00c483bfb5576d4004faa619e02c743f4911. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:46Z), 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/QZNWV2150604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004fe19653757114b1830f4738497f726765f01ce856c763a33c9d0b0d1e96a8. 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/QZNWV2150605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3e70061450e9b544bf0f943d05f74ae29eb318131da332781054287f85613. 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/QZNWV2150606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa38489049527cdd66c73d8b8b7e3aa0aa7e69df60d8b1436977ff629c41571d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWV2150607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dd2b1cf05b837b7fa4c6954b8da49a3612000ea83b329ce4cb769cece81dac. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWV2150608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56261f953f5f256aeb100734d22b17a4ab4d6f9acf54e2d70b2d1ffb52600f9. 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/QZNWV2150609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224252a872464d0fcfeacb50f7268bd0dc6964b21bf01e5f66938f3f26067598. 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/QZK6M2425439.
Hnos Barron (Mamitas Rezando, Hijitas Bailando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d40eda61bd8d69be26dc2a548b85522b6180c3c596fec938988fa7161c8e16. 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/QZK6M2310795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4401d32c6f31e22b35861277c1cb19d8264f3de2049a16778cf8f4fd19c5a2de. 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/QZK6Q2371203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08636917644f1bd0dcadaeae367b7802e653fb3c8a26753ab25232a7c287ceb5. 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/QZHNB2051220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ed84b2ddbedcaed733cb47611d7832b5509d0eeadbe73918c65dc7b0efa8a. 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/MXMXU2301017.