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 0x4f36ae95063c3968158ec59900d00ccb0cc7e793872c560d4d0c2b7d5c49d402. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54d5b031-9631-47b2-beba-fd8a43a870f6.json and https://artists.proofprofile.net/proofs/artist/54d5b031-9631-47b2-beba-fd8a43a870f6.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 0xbc33ccea517cd3c90dd759b18ea16725829ae3f913a84706fcede3f53a685566. 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/TCAEA1828605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52895cf0d950d1870a1d97d044978b64abc1d8c26509c4c4f62c349116225b2f. 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/US3DF2008090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda54dc0edc88182e94ebd80a4d2c346f0260e012279ff799924587d7133e0e0c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX4R52183170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ff474304351ead1cdc6f515ba5c541c23ee10df4abde991b60a14d51b9d5d9. 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/TCAEN1978924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c1f5f7a53a429c44a02cb93eacc9c7368eb8e016379a53c1ed177c9ea0d171. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU7261240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c798a4ec78d277469c6127db16936f747de08491670d65633ff2c24a333b65. 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/QM42K1951685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41895331033eeb558080b4111ceb8fc3427071ad6ee71e9a75b275fa29c6cbaa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL1971124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9889c731c0d01f52ed30d7b66a20a4912d685f7fcc385fd8018473d11f80c3c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEH1952565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702addc9f60c5eedd31dcbd1900247b4e559b0e3071569133236a81627a9014d. 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/QM24S1921389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae5ede3cc9be7f521f9d9f6776af8b4b383f02c23933def193e0172f90ba64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEA1996682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a7af2ad73ce023ba4c1e1ea738cd25b8edbfad6c596420aeeabbbc6bfeaf33. 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/TCADX1885588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfdbf1ad8205aa1048b18aab5389406d07c49fc3856a1feccf6e3ada296de6c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCADX1839062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48620a5d3eb807848ab4b4c54007fedf3ab8dcc41f0439ef78f777c1233553. 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/QM42K2062189.