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 0xf9c9f0122054b5646a0ea551c8d22b3feeae39537dc0bd7a53770c46ee524921. 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/0034da43-2070-47a5-95b3-bec2b1df2cae.json and https://artists.proofprofile.net/proofs/artist/0034da43-2070-47a5-95b3-bec2b1df2cae.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 0x6ffa96028d5378e3b5ce14cec6fafe226c98a0a8cacd4dc1ce78216afeef7c7d. 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/USCGJ1466581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a98b3620ae48f31e0763cc8a932ddba85f8a20209a2e7be0e5a2f890bd5319f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1466582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813803421184185352663403f4ee7bef3a838a58389c480605e3f32a4510b0ea. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USCGJ1466583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6322f89b236d28d89560ea893b935a3312851bfdad9cc67b37110d79af21d. 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/USCGJ1466584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a4096b2c294f87b8b472f02c33683c10117606e56249ea8ed6d677c9f86e07. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USCGJ1466585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6c6f486e680c6d412c55afb8ccc528d9fd9b13c9312ff36670e1ecc8a393e5. 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/USCGJ1466586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8de61d506772368c473a387777e74de09605b9b60d62244f6026591682bcece. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCGJ1466587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cadc5b8d09eda1fb26dba4e9dd4b4b3826d51369d80e3ada5f95c1d6fb3da33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1466588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e747117d5be6b058e95800cf6ff6a8eb0601ddd3d8737cba8976d661b5c43a. 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/USCGJ1466589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6299efa0b9a1b18ff4827d6699bec121edd6e47db5c803406665e271e08d36c0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1466590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c12b339cacb9af840eff68a0da27f1931289339db4b97b7d79ee8132fff9510. 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/USCGJ1466591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f26a0d74ed445a375821ec5a4697703cbfb0a5c58065daea1e596e6c57529c1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGJ1466592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90e0333751bab9b82c308117de7e390c3214a00a5c366a5d49880618958ec6a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USCGJ1466593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17f3c03b2f9d547fa0ca28ec926da0f600e5bc38d4e1b2e677941472215282. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHM21553947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d20cf5f8221ffc9d1308539f1cb5ad6b4402d4ea932f70467eea8d14ea8944. 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/USCGJ2264038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297865bc6c84ef31fc7ad5cbae525a50ae9a07d3e07022ad3bab87e9e953c5e1. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CA25T0610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3166c39d99de0c1850d870cafdf26e13e78bfb3529bc286b2a3445ad8f93e27. 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/CA25T0610008.
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