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 0x9c9e855b607bceb6954bcf89c6e469b9cf94a270e616549e59219a36609619a4. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8aa3f4a-b7cf-4c9c-8e42-ef2413368483.json and https://artists.proofprofile.net/proofs/artist/a8aa3f4a-b7cf-4c9c-8e42-ef2413368483.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 0x93d523ca4e1dff61251c75b4ee1065d1f14fae88847a5a531f2c00223562b7c3. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/DGA0R2339323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe203fc3f1a060b0549fd2e480b4e4ccf57f527084767fbe16b23d2bdaa401a36. 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/USJ3V1386451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61e5619cdcf22032568a3c85df9f86d952fbb6a497259526d6d3794e55812d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USJ3V1386453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44796edbaf094a70bf7b05d8b9165b13e236169f290815f06d5e221b31135fa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USJ3V1386455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdc4184646620ced494bf54b3cd4c767072790b63506ee315b8bdb852a81d81. 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/USJ3V1386456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a74b419ea6bf02b659c7518fdbe70a0f46da34e151f8874f95b121a58398f82. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ3V1386457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0410bb07b2fdbabd0cb305ec501ea3776933a1917e4bfc5b41828dbb54037ad8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USJ3V1386458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099cb3c09937f82f1818921f965c7015b8b80fda9cdf7b61191b3b5feb5b228. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USJ3V1386460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ec51ab1a03caba4352597c7fc89cdf0363c5f2ff3916defc7a9755dd954bdd. 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/USJ3V1385910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5332f62f44c463650da0ab93bdf1bd6c783a340bbadcb1cb4280d403529d4c6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USJ3V1385912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f30a1c47c4158aec79eb65bfed01e6cba1a0fbaae846a741a2e33348724df39. 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/USJ3V1385915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ada77f313a96051d1c91d51d55cab2960666a3e16fa87e2e5755069981b1d7. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USJ3V1386487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29423e38e7264478f3f7aad42e294db7a3c44ce521d6bc3e39b6c24679f7f749. 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/USJ3V1386491.