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 0x526bc4fb65617e639d9f7c41d9bf3cd5a41719186aff36ddbd88d89ea389b0d6. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e120dde-c396-4b22-99c8-de0871acc180.json and https://artists.proofprofile.net/proofs/artist/4e120dde-c396-4b22-99c8-de0871acc180.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 0x4c0b5a5901c9d18ea6b02c742ddb3694c6be78d99a43f512aae80651647eb260. 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/QZTBD2547246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a577468275e6dcd76af2e386d5baeda20a049471d332050b355c8faea1362. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBD2547247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68484e09375edcc539a813291386b5cfd45d6c36dc94b52828cf21cccbb0e59f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZTBD2547248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e13313232c3f3d40c8817b3282f73288975487c8981d43d335fd598dc8b2f. 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/QZTBD2547249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5b1ce5f6cd60969acb3a9d1ba882362419734084a0f9a3ed5fab54a853e2fe. 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/QZTBD2547251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e606f2b026b2f1a3260eecfabb3ef8ad764372c438e47178a498d9bf6b7de90. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZTBD2547252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94474f78da898910dca0fdcceefe4f061fb5a41bcf6e4eadf2593233f7ef9c95. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTBD2547253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1928c45dd3d1e43b127d1f131ae2a0e419990033d38a74fd114c0098627b337. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZTBD2547254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f2aec6f21f1ed43c0d7d54b3373e84a638de601f43bd5a35a562fc4b9cab6. 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/QZTBD2547255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a95cd65350d2ac8d51f0052494c42633d4a588b958bd3a1f75937d18957b4b. 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/QZTBD2547256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f007294b2436895b4ed33e6cdba33fcd0a4f9852e376b7cd36a46cbfdd8f167. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZTBD2547257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73709ee879906a7de794506c34285968ae9f66e9f4e8e5cd896779d6feeb6fa. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTBD2547258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8fb80f64b9d3d413fec0bd0ca08868603e9b4c1736680af7f2a1c17717af7b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTBD2547259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8317306091e5876cc9c4536f0317bacb3f7888ae9b6f5c734c8ceb033887b568. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBD2547260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e93c6039b9a8e8c5fc654788019d66414af9b52a01ac3e17dff8812fd5dc8a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTBD2547261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa7f448b4b9cdb6c05e23f42603389a5148e96e77eedbd36dac838130e81f6b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZTBD2547262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217536870434d44d9a3852c1016fe971fa97de52a5e36e1556edb4b441f175d1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTBD2547263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e4e3b500278aac231b63df701a5eee7854720b40728d24e4df1bf5393a5aa. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTBD2547264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf250711fff8c1f91cb51d92e08147edb86ddfb52255834b800f5c81ba13b3169. 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/QZZ772583424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b1a2099825d6cfdc3e6d2233e423e4c490d269315aa37b7555749342e65810. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/QZZ772583425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30208387223e4248e298586ca0c2b1570d6e10ac6a22e0462f19e4c7a9f0dbef. 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/QZZ772583426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23ab127e6db0f226f06f3a136558f3c124551ccf3133d5ac87a9180b3b8eec3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ772583427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a57769a20ad8983da65c8ddb9dfab48d2b18645f26db3c1a537381f437136d. 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/QZZ772583428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231a3745ece6c78ffad90c144d612db7fd547cf31aa69f60fdfb0a527074ac36. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZZ772583429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c305df2ab1cd9fedcff47892423161888c05ed4e6e32060a1f8619abcf318. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ772583430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01a1295ebea78c3580465a3ee7b274e93252a5f135f736a0921f472f0953b17. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZZ772583431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8869f2b2bba40cd383b844bb90e00adf2f0ed6418d6e9cdf63288bc59a697bd. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ772583432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c708c3c827ab7fc6a4e149c377dd01370b3b6063392bf8487411dab6d7fb17b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ772583433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76934cfd6af0f2f907824633d394e083eccc309101eb3faca0d6dfe979abd361. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ772583434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a850f115604163c38b59c02b2dbd13a69554365b59f000f9aeda972e0add4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZZ772583435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee73a950e9b75fd5c7b189c199d55e52acb0aebd2ddb527aa5d5d8c6e87e81cf. 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/QZZ772583436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be2125eb8d5e22416a986d4b3342d4fe8cb4032bf4f879566dbd27c0e8229a3. 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/QZZ772583437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cbb2e3dff654285da44009324fe77664f3910b0a1b91b67b7623b9563a2de1. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ772583438.