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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f543789721316bca904fd4b48b3e3342aa94e27fc7af0a93b3ef07862331af2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c5b9e64-ab5f-4f5b-a25a-d205071a5680.json and https://artists.proofprofile.net/proofs/artist/1c5b9e64-ab5f-4f5b-a25a-d205071a5680.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dcdb631574f78d62f18af5f3f1e71ccb1ab5f6b4061f44095cfc4394093c87. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/NLA318500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df689e419005f7c2900272b3e0c68e77aed8c47e1fd78be6f9c353ad4499bd3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLA318500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49568a490274f5c5912e06dccc625a19391754f26338c9a41d5b466bfcb13c72. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:44Z), 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/NLA318200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf122094a39afa3a1cd268deac62b7b5763fa1581e4e4f8ad5235b100a38d8307. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLA318200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c137875360915f0e2ac7f25e05bfd356b0a602718d20ac7d0ea2e4f641e081. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLA318400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4b39e3469171983b0fb633b782835d7c394bf946afb011ec356793dc02b547. 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/NLA318400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4aa4dbb5b178a4ee81813e91b30eca56344401e7a49d715db68fe17c3d1c7e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLA318400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdff28baf3dad674640cba49058f2850dad9e85e50c94206c2319382397b8a28. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLA318400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a03e969ef9a8e946abd066a30d394aa50b2e0fa6eff3784955394db4a695cc. 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/NLA318200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea744357e6714fdf0adda3ba052a647e311cf45014f09a9b3ef1c2f1bc9a7dd2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA318200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7a3fa0ac0d2b3476dbed136dbaea7510c74be9d4295b2408257b022c9baee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLA318200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea6d12eaf7cb37eac64a3fce26a9101c080fa78aaafd31344a9214dc23a75c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/NLA318300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943e9d1f958e186e1d4dfef2be6fecfccbb809b12196c43cf99130e3bc1719a9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NLA318200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc29816b18a11c96b364b56325afc31145497270effd6c05d785c35bf9b6fb2d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NLA318200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620362103b66327994d821ae2f3e805a9ee4cf1cc635ed11403418786886a577. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLA318200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b73e3c13113a60e7ec3019fe6b4afa3239129d2dc7bd1a8ffa8e0f1cda2fe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:34Z), 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/NLA318200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c90d4b907d7cbee5b17066a93687fc6c4e666d529bca4df5965c380ab25459. 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/NLA318400005.