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 0x5b009606f0f5170fc951a2eee63b5ca152a4328ad47d1915c9661916807d8643. 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/1e0357a3-dbec-4d60-84b6-2ad867e1ffc2.json and https://artists.proofprofile.net/proofs/artist/1e0357a3-dbec-4d60-84b6-2ad867e1ffc2.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 0xa363fc3b0dd37236d9b7c0a11448f60a801dd9c9f66fc1afd7786b53ef6e7e1a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBARL2000736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb366bd049fcaa5aaf80c2a92a5e5c3502c32cfbea8bbeff2b2e9b63714c657c. 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/GBARL2001313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b03d68650d87869ab4b150fbdf47d9bd00725b6b668502f749aa350e27b672. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBARL2001312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe802280e0b10ffbbbec72f94824dc92efe8bdff68ec2b5e24c3c9f0f809ebd43. 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/GBARL2100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d11876ed905c13f64b14a3cc4e959b30a790000387a774ad6f3a98612b08c4d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBARL2100337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19cb0a5fe5c6b7f143b2ac7ba037e886fea82cd38f55bf1047b25137688e0d5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBARL2100338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5ab94b213e1239f5a9b84e9a29d681e2411f3ed7d142d03ecaa3c4ca41108. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBARL2001590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c343ccc6e0d9a24415de8894c4c5528a1cf6a0080e30045e1ad8a49a5a8ec8b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBARL2100339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98406dc1648a7e15420220811d1ce91469b3613633e3237ade6777e216eba5f4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBARL2100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f8eb815690db9fe21de86fa2f92a23ebb5d6ca842f6b06c681a746d31b496. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBARL2100341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba569b11a7a41c5444358ade98f31b86069877d07290535b84173c8cd485e74. 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/GBARL2100342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef0f1a60b2a917f021fa3c16f432a38a9d17b472219d5b7c8b8052fe6522f0d. 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/GBARL2100343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6c436afe25850a8f9f03ec5b80cc72912ce89bd15b46f423b16f300c7fb793. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBARL2100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44073f05b8d388a9653d87ab22b94f28a42364494ce1eae653be05bff6c6f67. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLDX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08db80acd1c6d7b0ea5d891f186166e05d4867011281ae55c73e9dd17c8d750. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLDX2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbff1f86a311af2d7637f831ef65ab736a32c0011a4a7d4022287778d11d247. 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/GBLDX2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54167164d721e89eb55cbe629aeec525b19963ebd9ab03cdbfa30ef50aac4571. 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/GBLDX2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd048ac4a192bcd99fb325d9667aa3a5a849ed290f19a25336de9a7cd716e8f4. 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/GBLDX2400084.