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 0x54c4233e00c46ec7621ceb497c532ce700bc434dad7582bf06026b93018ef218. 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/40f81fea-39a8-43e9-806c-a22ed7b4b28d.json and https://artists.proofprofile.net/proofs/artist/40f81fea-39a8-43e9-806c-a22ed7b4b28d.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 0x6c181393942fc2708ddf52def9801e2c9298aec8e13ee3c71cb248b93c57d893. 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/NLKM40900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c181393942fc2708ddf52def9801e2c9298aec8e13ee3c71cb248b93c57d893. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLKM40900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a2b1615c40e21491535509985ccc3e3c6de7077fa9540ccb4a7d2710f475a9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLKM41100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab5751ab29fe1eaa85e8a804c70ec29e20d6ac3d119a38889f0d1b2c83981b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:00Z), 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/NLKM41300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa975f1cefc4bb71f82de86dfba1e3b97c4fe298310f89765231f40cd9bfec8e7. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/NLKM41300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3e7adfbac736e64c827727fafb1446d8e407e19d13959f4879edec1d24b02. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLKM41300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677417d0981451c35b8172d7d7b448ebad494662683f7d0d8a480e983f3c7dda. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLKM41300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f6dcf48dd32740bee724a7817f7da79c2655530293bcafd94e7851b0a8f9ab. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLKM41500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bd9d52a82d7088504b848c0ac55a7fb7e3ededa204bbddb18e78f5b9799226. 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/NLKM42300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3349133adc1f113bd6c36f86f23dea88dab3bc1b9ae51f564a0346b2034fa. 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/NLKM42300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02dd2afcba037740a00808dcc93d9f7bac880862d4089da8096e9f4fff16d4d. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/NLKM42300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de630f168019ac043244182aca7bfefb124d3186fd1490c495f98c1733c913f. 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/NLKM42300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6233feb7a4969c211d0419a0c786c9ea1f2b252a366f5dca6cf89fc38514b25. 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/NLKM42300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9295a08ac9f1b6d194096caae193f2565c9f0874dc8f0f0b047f449ffc3c8e3a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLKM42300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b459cfac5d9b00704cf0eefbb45be4773a2af520baf7c51967dc2e0c0719de. 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/NLKM42300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef8ba276ed122d1b9f6f24f93e4255a85be126c1e30d850533b2460181198ee. 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/NLKM42300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0cabfd3273ae6664d551dc1a028f4f7fb188c500167d08a59e9251c9d73052. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/NLKM42300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3349133adc1f113bd6c36f86f23dea88dab3bc1b9ae51f564a0346b2034fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLKM42300014.