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 0xdbc140e376ee359ce3da35bff0d0b9be05eff7e1d633533dbba9d044c0b7fe5a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f02b1184-742e-43a5-afb5-287a5bcaca53.json and https://artists.proofprofile.net/proofs/artist/f02b1184-742e-43a5-afb5-287a5bcaca53.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 0xdb4b8e138c88e0919427c84751c8425d4e8b9d8ba4497ec085e04a83d46b71a1. 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/GXBAV2546244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c5aac557c0753957789269a3df78ef845893719eb49c4d084bd56fe79b0694. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXD7V2531748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a867b9548afeec4de470540f27a50d581fa430bf86cde1996ac2bcaf9f3113. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXD7V2577738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f0bf480a2e819992c46544c7b1ea15a26aa3132ed155479580ffea12192d6. 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/GXD7V2596244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b2529244f209eb5f3d749f3df4c559b3da1811798794a9867a1bb9da39f73. 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/GXD7V2549284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459cc3b22827f476f7e2148d5059968759f7c0b9e95bf185b3f91a2b8a757996. 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/GXD7V2562184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3407fcbc07811fde0d138ee8fed9651ba61b70fef571ab9bf32996971697c4. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GXD7V2527569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeead03ada2c7829bba43dc540d7a36bd3f57083a1cffc3f4e459e49da65fb9. 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/GXD7V2555175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1289ca77af7980b8ac286bd79e0acf38d4b5c91331ef9e3f4e10d35a22f7f2. 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/GXD7V2538826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1182fb4754850aeb834df1f8b646caa9e104f86f46c140c321f48303566c222. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7V2535729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e57a71c4c38e262f54c03b13335dce47d0f001f94cccaf0fd04de4e09ecd2c. 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/GXD7V2577036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bac1ba468d3fc3696169f7316b2bbf747d192960168256fdfcef6083cdfabb8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXD7V2576439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446e0a39ded2c25210fe2d3e59121061d12fc6a89b6322b60b3b4d576304c5cb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GXD7V2527821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aac77443d332d6184bf1c188f6a791c2a840c0b8f879d253e42d0e447e93f00. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GXD7V2520321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25196d4963ffb8cf37f309fc18d9801d3c7a0a840e78e8ad989a1258188b74ba. 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/GXD7V2511160.