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 0x9a20131bd2f9aadf86e620b2f5d7eab6a3b6ec6e4220e6ba448bd8a572671566. 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/8149e540-fd9c-4b53-937b-3f90baaf6cd1.json and https://artists.proofprofile.net/proofs/artist/8149e540-fd9c-4b53-937b-3f90baaf6cd1.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 0x8d7e419a83a453fd5aa14d71c1ceda48250f6d447ae3ed7d8e4f8b3e2c60ae43. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/IRIRA1010802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b83d3915d414e4af68a9c1627d076a87e0bfe6b42c7d4e8a9e2f61c6f873b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IRIRA1010804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1e49ee160ee71fd4bddfa8efd3d53672a07f36961126fc36ba5a61fc95617d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IRIRA1010806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3875d61bf03c7172d4b69ae14409fb7a6264520ff47192dfbaeb5e6aa85a2059. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IRIRA1010807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638f5788b730ea01e68296a68a8ba2c5f0c9a3a84768b8257e85e2a2dc2eb934. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/IRIRA1010808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fa6d0e5f1d8ff61a0ab87140318dc345268455cefc265ac4291f7a61434652. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IRIRA1010809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5156835c3d3101b802718e97c32a457840755c50092f87c12433d166e8bc4. 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/AEIRA1010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88579aa751253bc561fe033708eaa8b73d29f49b421e929bec93750d7250c39. 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/AEIRA1010002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186fbc214fd68496ed674b4470c34ffbe2aa16b480e83ac54d352571f15ca9d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEIRA1010003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6bd6f184a17632e96cc0066717e2bfce66b92b2746a390c4aa539437ca5e24. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/AEIRA1010004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911310c173fb19adef32b81cde4bb3bda47949da086da31d63876635a4c50cb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEIRA1010005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c2881378c9947f3d1c8290b02ec9044596ad0931f3f6a094f70f8c63340605. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEIRA1010006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a606f1a0d3a4d7e8b97dd24006a32356e9beafc4cb850fd3c2c6b0685115b8d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEIRA1010007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad584a263ef31bb1623fdcb787f2fc63701090bf6e88bb48277471af5eb80202. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/AEIRA1011872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1f7efb9165e797601192f7bf37b1d7ff7f92b35ebd3156d462f03b34d88bea. 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/AEIRA1011885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63926f2cd566845f321f238bee918c1651224ba764e81d7033cbbdcab83980d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEIRA1011886.