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 0xa66869a765efca41b9a01ba385416abbd0da49317d15e07f1d13fc5f2534a0a7. 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/ca4235e6-d7b6-4788-b324-fbece489db0b.json and https://artists.proofprofile.net/proofs/artist/ca4235e6-d7b6-4788-b324-fbece489db0b.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 0x4362d0980bffa88334be67625be179592b48e4183cfff77f900c1f13609fe73e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAGF2296192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdb656a793cccc74c5e73a1eec893febe1694c9466c9be1d6936f0548ec91e2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:51Z), 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/FRX762213725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28907c3d84848fed418ec87d8034319b3941a1edc831cf095734c0db41a974a7. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZHN72305284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694aec5c8974aeb000f59ed2eb82cfa85b761aae34f08da44e26cfaf241f1b62. 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/INP1P2300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07409cdc5461fa3851061598d80e981fbdb5fdaf71e62700a4d02446ea36bf9a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INP1P2300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9729f5d77f9b8e1be9eebf157712b65350d6746a4e9ca911f8558d9d3ddec15e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/INP1P2300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f667385941bd60c571f131643d9486a676cd55194623f5e18bc7b7f72836e77. 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/INP1P2300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21f3d3ac4d2bc268ce0dd71486f2e265361419503b6416b7f67cbcac0bc1249. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/INJ221907910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395fdfe87acf6da3414a194b9d3c372ad7957b1e393f84f40179eec9844616fa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:19Z), 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/AUBEC2482297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87069103a8a571c590886e3902290a61f911ff567c1a817bfdf9e071d19abda4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUBEC2536922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c953f2994bf0d8994d488ecd742d5463f698aa1c1ddc8cf52c1951c463b0e22. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUBEC2536923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe4abbf86174b95746bb2d74b7c086b70521e1b0e13f3c4121318c8131364e9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUBEC2536924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dfd3b73ea58c17339c3cce4365b9c2a8739fbdc661ab1a093e506c39307a50. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/AUBEC2536925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead1b89eed112124ce298884c44ce4b0ae66c4e4d9fa85dbaf1824e7940eeee. 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/GX53U2596043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4885405d282707cb870328e8efd6279582cafa471685a4c02531bc0daac9bb2f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INC622295097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66400052595dbfb563346e4ec4fd6248dee6000ff80d876893ecc32b1b09bc2. 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/AUBEC2507909.