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 0x689129e1a70453dc5d8d29801ac6fc0f56cb61d9cfd04f1f1fbed5e1c42f80a7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da7f9281-9813-4e91-a5fa-da92d13f008f.json and https://artists.proofprofile.net/proofs/artist/da7f9281-9813-4e91-a5fa-da92d13f008f.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 0xf71713d775725986fdb4728cc6ddf58d89d62ad328847a25927762e0dd9188b5. 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/USHM82466475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6adcaac5ae53468c951c15c58138a0f3dd8d99237ca021a01060620d919faa. 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/USHM82466476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7124fa82a02695f6e2f39d221916d0a4d552af1e8719fd472d3d575f0161ed9a. 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/USHM82466477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a6420fbf15323db4f4a104c8daad1a96b3b92ffbd3bdab94bb4624494a9076. 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/USHM82451769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed37ef12160a7075713096219726a21111db8d73b34995ad7ccbbcfe3b3fe1. 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/USHM82466478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ccfdc6311d60fa487f0d970d7bf58585d8369535370acc9dfae52dc9c462f7. 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/USHM82466479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894dabc493d6dfff71e26e43a310cfe83d3fa5fa3e35f8b786cbec22923b76f6. 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/USHM82466480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc236f3e99188fc40cffe986befe935492fb2a1d3642453982e6ee9dba75c2c7a. 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/USHM82466481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c1867ad304032a9984cb3c8dab1d9c94058e8e39866afb447bd5b6d69cfbd. 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/USHM82466482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf393498d10387ecfd5ed64bf036de348e1a6966d4045214056f9a0adf0847c19. 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/USHM82466483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54987179abeb858536b7bbd80ddd3bf1cac6b35bce579956e65be4ab36f4782a. 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/USHM22141687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1531a935730a7addf299de45e16f2b57fbba090c8104b5b45cc87399875d758d. 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/USHM22141688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739da6e3323076da7c69aa90baee48a4f8e04005b1fa594b6ca344891c663e6d. 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/USHM22141689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006b6f01ac214807517778c788630697dfdc5c1aa2e40054e532897a35f36bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:47:49Z), 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/USHM22141691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515aafe070fd67190cec8e4719ed1bee6a520dc806de7fa826810ada7d53bc84. 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/USHM22141693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34668c96657353ac0987639db720e0e9f4bf2c86a0cec7f6bf4aa33f9923995f. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/USHM22141690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a6420fbf15323db4f4a104c8daad1a96b3b92ffbd3bdab94bb4624494a9076. 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/USHM82451769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6516da01f746ed91334bc72d802088afb430691a54c896f96feae5bdea1e8c. 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/USHM22355585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48932239ee1d76bb268013893b22e5964f5071fb50a135a75b4101a687ddc28. 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/USHM22355586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329641c13ac098f69f22c504e2d5f0d03378ae91ea2f081c6d98a497651cb096. 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/USHM22355587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f209a5a822b59d97afb8eddd7f1e06120995c6817516995705af90464e1c86. 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/USHM21897494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42dbb0cee9d2fc05450f97dd9b71574e61b993099fd0c48a472316d8270279. 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/USHM21897495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ff1dd10834368cb4c0f2c969158112ecb855ec0ad4fe520ccea98c1a0c3739. 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/USHM21897496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc965309b2e6ba367268aaf9a6bae954903ed9ba75f30f3222b99b8b0c13ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21897497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b8db367dd4f6dbbfd34dfcc2828ca87c3912bf285107d4287d5a5095e3d88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21897498.