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 0x3b10bdba3a8083f29ecd2de3f32b29ee1716341b16aeb832e96334a871da18d0. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85ea0e8b-540e-45bc-b436-951cd1e33d82.json and https://artists.proofprofile.net/proofs/artist/85ea0e8b-540e-45bc-b436-951cd1e33d82.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 0x5a102b3b1a5060a8aea83ba1d332a9080a354d0a64a7f6daf1d1c24bd53c644f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2542486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a291c8ea77e40e850af4118b9e2f6822a1aff63a2dde18a4f5a91bb266395. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2542489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d5c619a32b2af6374fff6e170f27d54f1bff11b6e50456b8ba69a5077f8e3. 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/GBWUL2542492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec461afd4ba1261cb77bc4d8e125ea79192c327dc27212c775a9bc9b41fd6f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBWUL2542494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980b9de2e08b8d2325bb524c6bb445b94d5fc229e96aac4eda712f4240b311e1. 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/GBWUL2542498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0374e9d9b464c92814226a23009a1a18d255260383218c3fa52ac7e1e076cfa4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBWUL2542504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aacc758cc59862e6fa9b498ff3f6f9f4f5846dc6dec3539702f5be701fefbc2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBWUL2542516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c054cb39feb177ac46a2318b4a07f2f7e9b1e29b52d28956ebf9a7b5431b40. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2542521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b08eb73ee0a3116c1508880e5e21652918b3e6ff7d6643148b29a799d6a9035. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBWUL2542523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be66addcdb1b540ac98e516379e2515656281f286fe0871291b70e2078c1ac9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBWUL2542528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc527f03f0169e32f1f5a9c034d983b33afe1494c78bb5fe68a92321991cf88a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBWUL2542530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a758979a733d17c51c5ed33f7dc6fafc0787e495644d377aa39037dbaffb1d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GBWUL2542535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc7599b212f09a65df6a8683525c5b4a1ad578e404b7be0a4ab697d6c28cb29. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBWUL2542538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb34cd799634207897c93f36af65ceb32a32227763af4ba64e0c319a2d689f49. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2553083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71099044bb363b66a0e4f8ed253cbed0914f44ff850c5cd073a1d1af2a00c9de. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ8A2553086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1434a8138fe0c0d750e06d03420d23a53e0196c4fefa041894d41296c50dbc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ8A2553088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176a470da3f51be826ec53e778363080d2a07bd1e19eb02a45cd2618f555647. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ8A2553138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e616b05e6eacbfd30fdff119103fefb90a60c6252fad1af4be33f97886a1e9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ8A2553149.