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 0x911b97060d6a72870c87b7fa09b92bbad43a2aca862435e96f8c3ea8e795560c. 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/ba14d328-511a-4c9d-8d91-f2d5e4e87bab.json and https://artists.proofprofile.net/proofs/artist/ba14d328-511a-4c9d-8d91-f2d5e4e87bab.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 0x19be834e23b63b0a11ed13dd85b01da16c212eaa2ea81e126ab50487b7cd0355. 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/QMAAK1779653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fee2912b7a1313c3e2c47b00fc3d9d2c6c95e99136d65ca4e78807f69f1475. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:10:47Z), 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/USCGH1976038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb401a8255a54485be2b52dff487213d2eb6525369f6e012d37de29b9ce47bc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGH1976039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dca1b582bb6eccc048d2e0e6b665844f7037d9275537c34bdfb58f9af8bbfd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1976041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabff6d54442be881365c7d6c01180954269654a529828a656f33557ff52c5941. 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/USCGH1976042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827120ccbf409a68f7db101cf50c1c6e7794cc3a76a50ab263f36560530b0773. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH1976043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe2df27fcd24c7caaaf73bd575036690c9913fdf52257e250a04eebb279216c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFYZ2249164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3613ebbd3519c20dac70c22dbc5936e6ec68df3a87f52ed6824a5c37b56a035b. 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/QZFYZ2249166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929105c533f38ad52e7da5d581f5927ee723135f6e1bfdb2cbfc9a8c65252d85. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:12Z), 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/QZDA62323260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f473cc6b16d47f27dd04587bc920ca962fb9894b1b7931c53b755a2d805111. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZDA62323263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ed15050c5b639f2cc6ac12f5db782cdf41717fd26f263eaab7b772ad123f0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA62323266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9d8769961e7573559f21bcad60ced03b778d442d17200ffb69aa1ababd767a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZDA62323267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84e1ce40d67f4ee5f23e98bfa33748b4cb1cdfcd3ef012b1b9a95055199e74. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:15:51Z), 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/QZDA62323269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c24868ab428dc03e61e6376f32c63e9abf5d4281b5bd8967c104b207b6fb6. 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/QZES82492195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eac007792b009d6214d452372ec142a44f4766f9be06eaa177661334c114fd. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZDA42551554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2af87426b78c52f2c1a8aa8ffa7eac67c9097b32740aad55c79b6a4b6a18ce8. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZDA42551555.