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 0xba912050733d09a31d8bb2a269c769b3dddd84e36c4f9628e8cc3fa7ca630b29. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfcb6dad-a86e-4241-8d9a-441f2c712742.json and https://artists.proofprofile.net/proofs/artist/dfcb6dad-a86e-4241-8d9a-441f2c712742.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 0x9854801da8979b4f83b615d49d6e6e187af50cd888f7f83dddd22c43edc23a7b. 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/SE6XX2373800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178bf0058e05c6f4d18ed1489c76b72b7fcad836d0763582f80ec61f479c171. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/SE6XY2397459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3834caaa044c3bea21e238f7714607d87bd5a5003bb5a889679c8f33c78ce966. 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/QZZ972493469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69331a0bf3d73d92dbca2a79cc6e6c70392d55ce83fa513ae3c1a7f8f78bac68. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZZ972493470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0790a210cc36d29a5733dc6c3e24459538402b73ee2b0a9fcfd8ae21b2992d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZZ972493471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48cb8e8e8462105b52468435a7a74b30250b3db39f819b3075000902e393ca. 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/QZZ972493472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf47b129eb1766b4105cbbf20769cbdc93fc564285439221c4808fa282f81f79. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ972493473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcd0d3a8b98ec7a7856bf4970bbd73ec23daa726eebad77c3f1fd4c418dae8f. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZZ972493474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b64ae4ae55d7212f9c154449a5d69e7cc5ab232dbc769f628d26e4dbd83bfc. 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/QZZ972493475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfaaa9d3311397537a5ad2a1c0dd49690fb42da8ca257b08ee2b29340a41b2f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ972493478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50040446a6631582bdfbe0ffce6573716847c10cdbd7dbb411626055284726cb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ972493484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc677f357f607474f513f286532e50f3ed37c197a8158e4a876df1b18cbd4b2c0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZZ972493488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2fcbb18f1f0e5e352ddeb2320afb9b299dd298ab599dd694b3c79186e695cf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZZ972493489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd7ecf1922ae32faa07d89a2d598a34d456586fc457f9fff18d94f460c9c214. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZZ972493494.