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 0xb6700e1897645dc6457e778d870f1439e9a75d9b8969f639edd8f39b7d16c338. 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/3b967854-bbe7-4dd7-b3aa-f746cd9c5440.json and https://artists.proofprofile.net/proofs/artist/3b967854-bbe7-4dd7-b3aa-f746cd9c5440.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 0xe6f7f888e7fb0a242654df1aa1bee598c8b9b9a56580a26edf3c56fa87de1a1c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCADQ1823811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79db454e4d1a78e50b7f8447b6c50fd6d838194ae9a673096e22cc6cb940641. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADQ1823814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7156f67252faf6517f1378a0184809ef469b787f63c62020f3dc245c5cdfa93. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCADQ1823838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5239033eb55fe1bb9ca091085622e4890740649c08aa515b8b34d81a6a0556fd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADQ1823840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477a3c69c44a8e2f1b62fd5b23597d7c8f10ece97ed910a535774219b1b7d2b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAFA2010216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3bb08d4122238d79e05b5bc366c76f6292dd2080e706395cb8ae12c78ac794. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAFE2022747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2944fd8b1d813fb63bbfed5191e1f43aefe59ca9974a34d197f18c3d1246b9ef. 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/US3U82100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c24952c9ae8955e83d510e9b121609779a3005f73787a046f2acdf97a02e1c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US3U82100172.
Tales of the Ole West and Other Libations to Please the Palate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d4c70dcfc11566b805c06ed8d37591f4a3aaf74885a0cd2901a2836797a01a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3U82100178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d1cbc8dd8db8562e2d672ddcb9c7a91da81a2a42fb6cde1e3df89fe73a7fd7. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAHY2403252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b2bc18451d5ab361bb2a93ffc4b9412b981a989d71514d61ae98056ef2c8bf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAID2417268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616a23f4766fcac2e24044dce8ad7f9a4797ee12a429d1cd16bdb502946b646. 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/TCAIT2407336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2b9f5be1bc7116b757f0c7fe2f8da51b5f791faa585f57039f57a35da7857. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAHQ2316985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc543c6a0742e3ae65aaecda9f9e0bff976dd0f5ad2dffe56f2c7c950c938e2e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJJ2534786.