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 0x5c7c0d02891b5b8d664d9ad227fe2adee2d86077305cc56daddc7faaa3623d7c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/685c915e-298e-4886-bfa2-a9d48dd03e21.json and https://artists.proofprofile.net/proofs/artist/685c915e-298e-4886-bfa2-a9d48dd03e21.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 0x9ebd3e792111b7c923797d57f0cd0c67af7cccd75e3085839c8c6fa49bfe5f3d. 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/BK4DA2318783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa353f6875b2c4e674f0a52db2f47cd8fdc03488fe890ad0b06664c753d914eba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK4DA2320416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbf50aef6f1ebdc9437e820f72c9aa77ffd096b97829e671f4f78f879d85be0. 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/BK4DA2313858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b23dcb1619a79602e62e62a4f547955807a4fcefbf39ec89e8c0ba3e7d851. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USWL12300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b86224e871d41d726e135b81c87010c661ed8328e5aa258207a153f3ced182. 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/BK4DA2408631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd92a2ea55375d0702c3ae49c038662038cf91c8889f0bd4566fed7af338d5c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BK4DA2321351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df663bc8b5306ca2bca2f415011d44a150de204f356eeb8182002c6db0075dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK4DA2308901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebd3e792111b7c923797d57f0cd0c67af7cccd75e3085839c8c6fa49bfe5f3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BK4DA2318783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd12c9a28e963462b6a502e6ae371bb789108c09e7e5e9e7f1cace454ad3524. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USWL12300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d5b75e7204e14e3a73633c14658491772636d5e1acea1f10d2d002dadfef4d. 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/USWL12300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7ef62969a0da1f45b1275f3a9e4fb734f4d1636c6da92637365749f344f33. 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/USWL12300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b23dcb1619a79602e62e62a4f547955807a4fcefbf39ec89e8c0ba3e7d851. 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/USWL12300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd12c9a28e963462b6a502e6ae371bb789108c09e7e5e9e7f1cace454ad3524. 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/USWL12300127.