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 0xd8698b380d2bb01ebaa27368303e8ce4f781d4225a3af4233985c6a707996e24. 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/b64a3e7e-aba7-47a8-a588-8faecb95bedd.json and https://artists.proofprofile.net/proofs/artist/b64a3e7e-aba7-47a8-a588-8faecb95bedd.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 0x525a26ba80a8184e2b62e5465dc0a84ed4ddf21d7f2381495ae440b88acd55fd. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:33Z), 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/USHM91985642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a727129144af748f0d05bdc1f27d6382fbc6c00332d700fa42b0a3cfb11d824. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SEYOK1934927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85a368e096c75313fc7bd417dcf00f68e281b4aa529b15869629689df7aabe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEVEO2001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd718fd8450ebc1be6694075ac8f76bc241ec6d759b4a3dffbe708be14661e432. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:41Z), 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/SEVEO2001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e6c6ba4eb8437eb59f7d3778e3021875ca1d874be418c08a6f0707227c445f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SEVEO2002402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe680861b7a8587695a968be3c91cbc0800c4bd96dc9668735906765a171b2d39. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SEVEO2003102.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a504a24116282ae8e3919adf764c61cdf5be6c11c31a55744f0b6e8d2109f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SEVEO2301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b9ab6c42cd5f98aafaf50330767fdf8f763a43d9ec463958e2636af65d37f7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SEVEO2303201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e5c7c28607fde96ba0bf41f72384cbf97e3894104a58d7c969bb2d958fd96. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/SEVEO2104201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb808fcdc69c358c1bac168ad41280b138efa366d6197ebc70a66aa3086ad5c7. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/SEVEO2103401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c2148d4d0553e0e0fa0b74a1846590fa92fc3eb9fb898bf899c31221861e06. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/SEVEO2202301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a504a24116282ae8e3919adf764c61cdf5be6c11c31a55744f0b6e8d2109f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEVEO2301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b3b2ec597342b9660f2c8e211f2a4169e127730797ef0b11e6fb300d949854. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SEVEO2304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6572a83cb8d0c804d134495ec29dbad35dc00e29cb570818fae89a2b10309242. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SEVEO2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd320dcabfc848387152d5dfa961b63422396528a42c70354c5e5dad38899c9c8. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USL4R2482697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b8a775016b29528dfd178c684bee64838b691357b10e4bc511f8b2771573cc. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:28Z), 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/USL4R2482696.