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 0x957f09229f40551fb14db12d13f17a4844ea3742a81ff26957cecff163e07f42. 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/eed764ac-6289-4d05-a1b9-23a9337d499c.json and https://artists.proofprofile.net/proofs/artist/eed764ac-6289-4d05-a1b9-23a9337d499c.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 0x235a6fd9a0b65b39b8cc1f78fc11273cab36b611b2db5fa12795138f7be8d4e2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UST8K1813226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e6973f4a38394e2f5308a0e2ecea5a60252b2bbe4fea67236a5ab5c8db7b5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UST8K1813227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4394a811b8a4b0e29e88d455a2c11b6b426b267184ddf46b984fdc089cc230b. 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/UST8K1813231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63b253743f209ef82978e84aa31995ea24b0f26e1c555f5483b55e9e37f2193. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/UST8K1813234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa290c40171d3bf1d8f2340220905112e31db16fd1b82363da1ed9671ac499fe3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:04Z), 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/UST8K1813237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85937c657905d686a095220fe5b6da9dc424c473199a9179d0cfcb2d49278724. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6Q1988467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed7cd7ecaebe8c04058bc1d87356612fa073e7f01a3f374d752c92d6c3d34d8. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZK6Q1988470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6680af4e8c36e3ae3d6568160ffc7f33c8619bda501e36803aef8271fc31527b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6Q1988471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6e79ec56989c774173f05b8a62d1b401e91c90642e53c0aba99fb021c67727. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q1988476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2599cde16aefc1e5a947910f782251ef17d062ae048ed539ddaf484dfa19c4d9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6Q1988480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8dcea94e115687cffc7f1a2f00fc1bbb8bad7fed402036b1a22f80a7227048. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q1988482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b3cca846c785eef25f30afb3da3b47a7198b6c29b4ccc6db257e2233b57e6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:41:33Z), 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/GXBW82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2295216165556e345bdb10f129684eec1acfd7d531fd197ac8c7ed605f1f83de. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:10:49Z), 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/GXBW82300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae4a4d0e563195ff4bccd3b1df648a29ad2e41b32690683b7b1562a13e68f2d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:56:19Z), 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/GXBW82300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb103eae0b7de340e4fbe2517511db4e41405a234ffc30b56a938371817453c74. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GXBW82300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca79ea4278c587e8ff5bff258d48e2ccb4527f4c923c93ffc030ff2c8645484. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GXBW82300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d2b2681078674e6dfc41bcb0f3db24509f14c7e860b66c600c152a78acb986. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXBW82300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa69a681ba5524a70924447ec490380aff8d884887f05ffc222a3d7c452ad32. 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/GXBW82300018.