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 0x4c3b18d1cd4f6cc0747a2129cd6573e2b3530e9886fedf5043f39588bc788d53. 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/df6cfc17-8523-4c49-a39e-2565c2641ff6.json and https://artists.proofprofile.net/proofs/artist/df6cfc17-8523-4c49-a39e-2565c2641ff6.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 0xef2d115c0ba20d817e90038265082fb010acb9236dafe159492cdb954268bf98. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWU2290960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb541886c9a00576a281e12b42ae5d6fa1ed130f11af61a46e0a14348341ecde5. 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/QZHN92309464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4e030edc8b604959b14780f5430aa2786085753b3a889b53a946a46c5bb984. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZTBD2450935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd48223fb6b0cd5c7f3a75d580ee3ac18da407ae3593e743974e391d26161c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBD2450936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7509e7d43bb059abba6d8e53e279e58992421c6ae22d6d8f36853a3c14dc401f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:11:06Z), 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/QZTBD2450938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab6656d3dc43301db457d97b2a9d3396187ef59b27fbde6eb689498d08f992a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7R2496922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6b24c1c8b13cdc9ef9f3dff82e6b3e9b9a086b2c68dc1cccaaa2936349a78a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7R2496923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0884540fb4c5af93d6c311341e413486d4e72d988e2c023c02fa5537756c8070. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES72519675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccffc5ae89c3071e0648d3fa47257e998c80d79a31f85d227132d09035209ac9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:34Z), 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/QZES72519676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f02dac402bbbfb4be4d3cacaf2cbbb0185c0c4497d1bee7ed3e49f29dce8e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZES72519677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31459e4fae014e20dd5af7c3a7aaa5cac506455a131277ca0aac96f34eca6557. 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/QZES72519678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa471043fef9c1734ecbbc955db6aa5332d7fe1c64dbf3c78541dbc75c5e5dc3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:10Z), 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/QZHNC2537973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2870b695b9192bf184b4592b64800429993ecb89954a2e8ae8d1209f16b395d5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2537974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cea83b0eeab0863ffd239df0e4bdc2c403d440865915b975bc2bb11558b26e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:30Z), 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/QZHNC2537975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf672cce228674e48b8655ae5a8eac4f69b40e8af5a42733ede0bfc8d50bfeb1c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:05Z), 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/QZHNC2537976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d985e2265812cdcd8de0d59b8a975b95ce5e9206294123dcb1ca6b2a1cd1d7f. 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/QZK6G2521069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061f50401c290c871c6498a0c1e1a2223c66e93a4a2bc7584418046ef4ff8dd1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEN2521180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c40079238e838592b5566c6ace54f282a97030d3e50abb6d7a4b4d99b76bb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:15:03Z), 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/QZWFF2509900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5b8badc34a87d7a0a971ef8ead19da6ecb75107c0525f086438525d8172328. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZWFP2565573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7258efced102678673c5bd12dbbe8c6c887be0d4d9768a438f773bdacb39ddd6. 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/QT6EG2524024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b1c804afbbcd256595b4b97b7b8b69ef7b870ebd45ef59ee6e97c9e59a5d3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:07:50Z), 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/QT6EG2524027.