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 0xf4a3a32b5f9a3caded8cee0eb900c2c9638cd58891b56f5bcc672df658d6e279. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b583814-51bf-4aff-a7a7-133f9ea819d2.json and https://artists.proofprofile.net/proofs/artist/7b583814-51bf-4aff-a7a7-133f9ea819d2.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 0x64c5fa6bb08dfd1dab48dfd9930e4d8283dd948eb2e418e73fd9496d7bd59b0b. 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/CA5KR2266947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd65e533aab3a4eaa997abced14d22c46dab7646768f3658ee9157a75493ba4. 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/GX8452200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48fe175c0fdda0934bad6c4ff5ac78018d96025859a72e0367076619f90b25f. 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/GBRKQ2256878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8872a4553ebf0e309ae04aade1ce9cdc121e14fe2c6a9f3b4c910228502a1d8. 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/NL1ZN2201595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb33dd233999dd0420f314bde111ad530984a7f6bafe794cd531e0f63eaa66c3. 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/NL1ZN2101557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b0ace77f7b1e2365d345aa1673dbd0f663dc1b0ad11766067af530ebffc4da. 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/CA5KR0019047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2cfdf43b85f727b9ec1c7ecffc17e595b4d93d8ab2367c4df9ba0ca43e1367. 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/GBLV62107186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530ad067e4da97ac52acc917da7de87f3017f4b76b025bc874f4b20120c21aed. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLV62107187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef45eaf0a83a473b0eb236b349a3b164ab7def01b15a070801a1b43c8aeca8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BEGD32100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef3adef0e95282ecdc28a77d1a1e2ec69298bea3500bdc629cc5d5ab7a5e27. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZ5FN2192325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0c7ed578adc9a9663beafc5a156fd4fc3147423ae5c0e49ad2075c34582b1b. 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/USLQ22080262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd862bf36dcc7fc4c8569ea2d93094453863dd7d0104e460e2b69918563b96. 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/CA5KR2088740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4bf9c2b46e7495fec59c032e25495a6bfbbf2b547605cdbbe92eb204c23b3d. 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/USLD91726701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecb5ed4a48707c45aa6ed2685be9a49db84304301b75741ec093d96f49ae9c8. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZE6V1800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afba94460ff8f3f241f3ad8dd587056bfff8e9cb504e34fb0024e42949103ae. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USLD91721243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a6bf3c571b2e5065adda17e22b801d965d6293d98b905bea123f2d2ea9543. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USLD91721244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d767223ebd35cb8dae25fda6a33eef3457492463e12eb9f0f7c42febfe9406c. 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/USLD91719577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a4eaea11ebba7acbcb1021332bc033de3f5b0ac3ec4571da9d14bc98472a5f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USLD91719578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2726c9fd0764f3bbb6f7818053e02e2e518177a7eafcc9791e31dabefae49c0e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USLD91726286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340cda15b48c942b8b8e67401f18b2b43951c67d68b33abd663a53b7b48fe5c7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USLD91721680.