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 0x06347da8541ecebe029b4673046309ec9b37477ec6577808960b89a35fd62aea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3b43ae0-5921-4302-a2e3-f788f902a96e.json and https://artists.proofprofile.net/proofs/artist/c3b43ae0-5921-4302-a2e3-f788f902a96e.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 0xefbac34bbe426cce89e762bd89a0271bb63ca96e09139c5d8dcf8659ec02c3d2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBDCA1502917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82eefda2f59f4593c4124c7611f92157576ba63692a63909ed864dd70b84a6e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM2PV1612904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9245a40ad2558c719b7da080d72e96c162c019b5a60c7518466ed4c647448da4. 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/QM2PV1612906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de4fac03a3bf52278eebb489d27123988c57bb928089db38e6469131f128b4c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM2PV1612907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6556d910ed45210345eefc1f8f8fa3a395319785ce12d1e204565803f9a3062. 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/QM2PV1612909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbd78ffc4f6df2cd71673d45e83a03e4e814e3213b6ded7b43cc8f13b4e685. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/OM2PV1612908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa2858a3a7a9976d1b48fb6b4a0a0994e5091ddb1ebb51d1d1cacbed3d580c9. 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/OM2BV1612910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b06d6794c1749067898e03c70657adeefd9902d29c8f4bc9511ce9b185324c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBDCA1603155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c6db7cc338d3a63e1bef76c56268b9ebcbcde04cdb4814c0e6671557768112. 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/SEYTP1709002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f14cb57e880f56e2238497d6f3b2c012aaaa2a279d54105c078dbc3af65827. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBDCA2003672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f23793d32e54743a28f9b98fb3ae72f4b1246c5c66ffc02b1bbf5b4d635aac. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:27Z), 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/US23A1582925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c16728c962759d9edab5db6edf996d36c08d9405ced8a8080817732a2a7ee7. 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/US23A1594506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653c22f94e7b28ad82f8451850c7c7b159b1517b77c2e0c50a1a81b3b5bb706a. 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/SE6XX2503726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76950e8d50713251af0e4bebe45c2c256694beda7c7dd2bcc2331f4099f92613. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:44:32Z), 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/SE6XX2509271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2c5b7debc6dfde7a0c1a05608f7e74da8f2d5f8374d7008f83a824f8bb99f0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SE6XX2509267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8b51debbd77cae96903f6472754ab5c1c668af090334ad4547cb13987f5e54. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SE6I32556268.