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 0x87c5ac90037dae60a7edd344bba0caad34a13519d8e6619cc1af48f3733afda9. 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/42d32a2d-9104-435a-b1e5-afa6d7beb0dd.json and https://artists.proofprofile.net/proofs/artist/42d32a2d-9104-435a-b1e5-afa6d7beb0dd.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 0x7ff8130cff32ba4c5f5610ed5c239a2f50ce128d7a36d411ca2562246a5cc764. 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/USAT21303957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e45e56e21c0788e148e115b996447d13ee19aa324868b224a9772df8f268789. 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/USAT21303958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348723c637c0e47cf4844d325c9314d78aeba4b211fa8e526dd429c2d87ae4a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21303959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc64f26b1e6cc2ffc22e9b498f9da038d47e19a9df4513a71c89368d4d525f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21303960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc4024e0f0bb30e49714bede7cc4e34ad6be3b310546f82b971637b788c1ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21303961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef0f0b8b823fe40a392392e167a58d8ce1775a7246720884eed5944dbcf678. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21303963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec52e92cb9fa59d3d0bb58249ae2f83f5e327fc1cc4b6ddc37368f569bd848e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21303964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04313dfc4fa56794cc38f59a37e5724a2c1764b17d135541e7fae546e94792d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21303965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d5c3734771da477a5a74dbee165a573231b665ec5a6b723d2b10294440642. 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/USAT21303967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804051ac948293eb9034edb4b73353c18a4e5805f5d6ffbf11d62c7b7b0250a1. 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/USAT21303968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b1f53a5ae608acd9aaf310e16266205482a47dd489ccf6d737285d5d44e424. 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/USAT21303969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5afd28dab0b658af7042ca76544116c37d5338dd943fb7f02902c4f8b09660f. 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/USAT21303970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ffc575202984669efff1bdf83925251e1fc9fd39ac46fc9f0a52daa2afb187. 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/USAT21303971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8431e4c49c374727b200a8b8c3c07f301bc1acfd2d9ad0725c16932559805b32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21303972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e421c43e0db8c906dec34d4b2bfb9a4d53aaa50f27b297893924ba9fa551d21. 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/USAT21303973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa27107dad8c2e1ea6ab9f0183c41cedee60b5cf4823e909c5120d9ad99d7a. 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/USAT21301760.