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 0x8e9ccc1e8e5d6667625aa1208566559c5ef26dfc8f60b902edcb00113c5c893b. 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/56c36204-acb1-49fd-929c-eb20c633bb22.json and https://artists.proofprofile.net/proofs/artist/56c36204-acb1-49fd-929c-eb20c633bb22.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 0x29c62b6a3e2936cc693d12626a941e591a627540cc0b510a79bba6b8e2c25988. 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/USPKU0860001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376a58acf3833bc936755c99fa567bad289c7ca6bf831fa2e8af8f2291ad04b8. 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/USPKU0860003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f94e8758ef361773956b7a4daddfe96a571b8846c4b2dcfb9984bedaac3e31. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USPKU0860004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338e9988edcb358bb5722d0b1f7fcd9119f45da732ef68fdd8ffa0a388a8784. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USPKU0860005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66644d259f605d77c1ae46309d8dcfd284a8a9be8756641b79a4cd245d9638d7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USPKU0860012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a163bd85b6caafc6fe548211e70b2ed1634d76cdc0b548d2ef9dae7c59cd17. 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/USPKU0860013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86b8ec6c2dc9870f9a564e157a443efeb67f92fe9386aa67d875e8c8f9a92f8. 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/USPKU2412005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3644288347409b50f7a1a146a37e531c2ebdd3ec238700a3e6e4b6ba0e28f30e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USPKU2412009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c4be5166fe92c97f6237ca166a95d665cdac6db167e20054fa81fb2b20c7b2. 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/USPKU2401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf729e5a036bd2cbfe1a1b04c497758847c4a34018690d9a66e77ee8358de8fa3. 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/USPKU2103001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a90d6a965c5552b503033bf4e0a46c85dda292a71374f17de48ce6f94f90199. 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/USPKU2103006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b48e3e0dd333dcc0291cb474d372117e6124e2f502810df1f4aa3662f3fc6c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USPKU2103007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23fa0c5dbc3cd167bbe3a5aea30e0fd7c225b811355a79570cf5185faf260e7. 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/USPKU2103008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d7fae84cf6a515ae3b1afd1f02f06c330513e8b62da7d1af02092a64e10aa3. 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/USPKU2103009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657e3bd985dbdafb7a05237975418838ef226b9c375c752c57550031ad85197a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USPKU0860007.
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 0x45abc745091295cec62a229b703b1d233710ba918b2c79a61d512f214ae914c1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USPKU0860009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e09b3e4c42c55c7aadc88f089e539e19671ffd40dc2aa2c59411a29f587cf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USPKU0860010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a3c4f31dbd6e4d5eb6cced43f5fd67ae6512c3de3599655aa4c15e8861c83b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USPKU2412007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5814b8b7462176042c3f01ddd75704c17ddc34cb9d8244fb9378b710e82570f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USPKU2103002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dd66dccbb1d80a2ab5841db33a24bafcf9c377d1be3c29d582d3eb07a2f8f4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USPKU2103003.