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 0x5ba0aa936fe1a75caa5e16f35604f2413a9822532658efcb45122351fb80a20b. 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/c1d71cb3-1ce1-4e10-aa42-533a16a314c9.json and https://artists.proofprofile.net/proofs/artist/c1d71cb3-1ce1-4e10-aa42-533a16a314c9.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 0x4794b41a12ea7dc2e72a12557c0e16e8cc7e488734db664fb43807ac11b29306. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAUM72201922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a28fba54b7bb916f6a99e369bf76a3743fd0394d297a852a9ae559d063b089. 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/ZAUM72201923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3a1f672b80acafff339b7508b6caead1b4b376fa21d5871bdda97dd8c60f49. 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/ZAUM72201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac3e50385880e14c8c0cec834b74e1a8b398510cbb4794ea7e85fa5a207111. 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/ZAUM72201926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52249ab7e6cdd774245ee7be4effa607427052611deb3f6cb84f458b666e41f. 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/ZAUM72101367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aec2b19535811298aee3ba13922e02801aa8080fb442e9ff6060a903fae8d3. 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/ZAUM72101368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e677bc62d37733bb51916bde2ccba53d3163ab329d849a8fd9c3debdf75c01. 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/ZAUM72101370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a637360580ee8313d8fe2c2cb48fb1e2cdee6eac2147e8e9fabed5060238130. 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/ZAUM72101371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5fb2b6c2bc8c0f5ace109a80f79a1ef1dcb09b67163c974bda705f285b51fe. 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/ZAUM72101372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2cb0bb9058059cbd93ca7d9375e8efbe164bc969a9d7831c47823a44455cd. 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/ZAUM72101373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3c91f1a1da52da662366fffa076cc509a4f5fb28096a4d88c79a2826afa0e8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZAUM72101375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed920269feda5fbd29a52cef7d3c5618e7fe5a6816f20e240c5c13dc43f6556. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZAUM72101376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52249ab7e6cdd774245ee7be4effa607427052611deb3f6cb84f458b666e41f. 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/ZAUM72101367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aec2b19535811298aee3ba13922e02801aa8080fb442e9ff6060a903fae8d3. 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/ZAUM72101368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e677bc62d37733bb51916bde2ccba53d3163ab329d849a8fd9c3debdf75c01. 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/ZAUM72101370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a637360580ee8313d8fe2c2cb48fb1e2cdee6eac2147e8e9fabed5060238130. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAUM72101371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5fb2b6c2bc8c0f5ace109a80f79a1ef1dcb09b67163c974bda705f285b51fe. 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/ZAUM72101372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2cb0bb9058059cbd93ca7d9375e8efbe164bc969a9d7831c47823a44455cd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZAUM72101373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3c91f1a1da52da662366fffa076cc509a4f5fb28096a4d88c79a2826afa0e8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAUM72101375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed920269feda5fbd29a52cef7d3c5618e7fe5a6816f20e240c5c13dc43f6556. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAUM72101376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f08246102e0f1c700c58c663c5b8acab49af7904c12ed7ac2544a7bda4853a3. 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/QZMEQ2441329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24939851b2e20bf4fa74cab07b3e4114d9289721474e3f82d6dae7ea8bcb9b9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:16:06Z), 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/ZA56E2416177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0dfd308bef959365c49bd4d69a63a60c942254c29d7c53b7f2b1b995df8cbd. 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/ZA56E2415734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ee044ac63069c05edaf5d259ba39259615dfa034064cb7c66fe0f2df01bfa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA34K2301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12823d944d9f0c2fcf3f9906c4fbb7d547a72441e7842a86225e518b86617d86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAUM72300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68729f9aa96beee0f4e03edeb59b5dd4c409286dfd9c5eb6476246449e0fe2f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA52306939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e677bc62d37733bb51916bde2ccba53d3163ab329d849a8fd9c3debdf75c01. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAUM72101370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5fb2b6c2bc8c0f5ace109a80f79a1ef1dcb09b67163c974bda705f285b51fe. 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/ZAUM72101372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0aa29ec039eb8df0d7761100a5d5319f0b935eb2d3ee2610825e31159ce064. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA56E2000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edefb04e0c884252f25d53a5adac5c70ae80e56a7f2810414d6c968b54babc1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAC011600888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ef2ee641e38b4cc4e8de322d2ebcbfc730e8dbed03dcc12ad628c88eff364. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM21837521.