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 0x54c983cba416ae28108561cb18d6121593bb3f3b5c8b9832aa2ba1f635848efe. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdfdca59-3b37-43ba-985f-0ae87eec1c68.json and https://artists.proofprofile.net/proofs/artist/bdfdca59-3b37-43ba-985f-0ae87eec1c68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swing Gold Collection (Leon Berry Vol. 1)
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 0xdc4852fcb887f51abde3a07ecee55c49cd4e09cb98577bcabb772f43646a1fce. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLGL1102963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd1c5bebb75c4d4952d77468b1a91505a72027abdbd60dbddb9dd837fb54a97. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLGL1102964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e0b1fd30c860eea6ac2829c56f1296e28af37e5cb0bf23b9adfb62934323f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLGL1094265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694a91262463bbefc560c1ef4aeba172384ddbc561a98df2741de5130d35bdbe. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLGL1094266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795544c77203e4b47bb02d14205cb43b1442aae80d83beeeb250d7faa01b7a8e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLGL1094267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d33d32faaf2f4600c7cfa83dafdb7cfada65d7477a66b9bb493de52a3f0e41. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBLGL1094268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282dc199669c18402f2e99ef2a48a548b1f066025d4486d29e0c33a804aa7f01. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLGL1094269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba20bab8a9e6dc8f2de1e4ab34be6bf0df1e91833cd85d3d408a7b75e799d639. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLGL1094270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5538f9682117b4a80201d02aea43d61638da51c928c896866214ec723f9d036a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLGL1094271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0248ec1b52d6d883172003c222008019c3e5b377edadb9950bb7470529222aed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLGL1094272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b433eeb05571dacd746332fdaea0ce4f1befb4edf8cfcf11fd144b0dfc85320. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLGL1094273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fc076d28167492f4c49a82c8726bcae8bf01eacc42db794cd5bde4502b65c3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBLGL1094274.