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 0x3833ab72de9f376b97e97998206f1368af37fb3d70de04e3cb325dd7b6a2563a. 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/567b7f01-1f80-49f2-8ae4-ae47227fd44d.json and https://artists.proofprofile.net/proofs/artist/567b7f01-1f80-49f2-8ae4-ae47227fd44d.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 0xbb29ab16c5c53dcb5f32e33f735adce6f14c9ba3d026195c06234be6525ccaa1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6J2093299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525f1402b30b3c2aa970c817cb600083af099fa46c014be4a55dfdb20f1a22bf. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZK6J2093300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584e0f306c8efb77d7826eaee2cc202623645a5854d1bcb9b99529c6901321f7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYX2189121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80886f92bc9ef6352b7663be56a1044efd3f1206a1c989d2d36fa99f23739ac. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZK6J2093297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e9d623124c9242f006cef9ca3759adc44314f12314451e47871892fa63f79. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYX2190139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd30feaab5f39c21ce89edf702a715fa9f5427383c8fc631ff92d0114d0d811. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ32118846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8da0dfcd37a83320d75254872c995ffb71c9adbd360dc676a59788889f2311. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA52108002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a922af550426da82fb1abec75504ebdbe908eb00fe4b6305d4c34a9c439a5f0. 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/QZDA62294905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9132bdf4973e15c3566c0e36c134b9249d790864ee0b36040fa84bbb5def7020. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWW2216721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ffa4ae48468e12652203a280671a376cbe8c03a61dc589a986f0c3bf4a11db. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBA2205690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0271340ff818cb674f48795a65241caa57c0f47b0b6a78c03f56a37983816404. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBA2205691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4b127db3d1dc1344d07456d3151403aee6ebd598e9f2ddb76296f48b5f00ac. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:52Z), 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/QZTBA2205692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f972f75f4ddc5a11e08b65decb65c28c4d89d73f82144d0f6058759dc4669. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA82337097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f462c6dfbb193d226001e0abd46268160f4f91c878bba57a48a7e2f9c35dc7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2342011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e7bf1ae1af3db5198729f809088eabccf16603a047ba1424d360f3d81f614c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFQ2397772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d765c506a94181a31c026a7b0f4b4c65cc1a2f05b9ce19be60405ca3a1ad2. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFZ32424661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8594ff529360926956d1a3198127c48aefec94b91b2c37713eea7c2410bc2a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEM2480761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2dd6e49c183d74bd29a366185cdbcd1be152a98061a42b062f698d6411f5ae. 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/QZWFS2441978.