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 0x4faad7fc7c842207f96814394cf943d8f9a09198f8a2a40a2aff5c0dacc1903a. 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/9ee711b9-a4b4-497a-ad66-e955cc6a5422.json and https://artists.proofprofile.net/proofs/artist/9ee711b9-a4b4-497a-ad66-e955cc6a5422.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 0x134f731f76125e1a9f4f7184dba927baf20488400b6984640128cd77347b49b1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:18:58Z), 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/GBRKQ2211153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321334e442c513b8bc87651c310c20ef89141974227753443d6f726d799e4485. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GX5H92302292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47a6df7a6396799ac4da88763295af5a53f8889a6887e7ba86e95d104538ef8. 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/GX5H92302484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52fd7ca149091d0ae948cb38d71fc2b4e3e59c86d0145f327dfe9d30a9e1f4d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX5H92302950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713df4f7259942d5959aa3045ceb47ff63d0425c6d63f28f709245ed1bd31c9d. 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/GX5H92401484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a38cba09d8fd730d2225c15a6e6a32f83f261acc9eecd321bcec4c60df2b9b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX5H92401660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5f0128047b3597f12b139bf440c08754370143b7e1a77ccfcf927caa6f783c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX5H92402300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0aa5cafc93271cffae1b5f12af4d25bc1f8849dd11022f991182a4802ab2e6. 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/GX5H92501365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f86d854d18294de2e4cafa9bde12a59ddd6cec3c764e75b015d4e4f6f2a2e1e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:14Z), 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/GX5H92501523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab0019bbeff7991b8cac1fc55934b0d8828e9f9ce3ae66f780fc2552b4a13b3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX5H92501606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7934f77b1ccd73e91cf87b1343389fb0a302a3c855c24cc314369359630bb4f. 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/GX5H92501730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bf0d19bc7b183c1dfbba8ed2513b033604b6994feccf186b01910f518d642a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX5H92502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7612a95c834e1b151fcf46bb1575327a8688baec9cb2339704d955879a6148. 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/QT4K42564679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92455a411c7df6863fbddc3df3fa7c7b0f17c14d7c5a320772145ce832f0de4. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT4K42580356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2afb2861545b1be0d804ee66848d6fe2c2dc9afd69fa13b03b9bdca83672ac. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT62U2512956.