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 0x1f5d23a792318d169a0e03da56fda09020c1fb0993bb8c0119ebb6110599c6d1. 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/84d2320a-bcf2-4137-b3a1-a04561bd3113.json and https://artists.proofprofile.net/proofs/artist/84d2320a-bcf2-4137-b3a1-a04561bd3113.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 0x44d180067275414d6c3273544e31d3c328eb7ce95b7c102996c048b393fb109e. 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/GMBA21304468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc690965abf05f6256d5b21e95a1f972d1a314165b8279c41d1ce4c399b8795. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GMBA21304469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0cb406f20e164bae12bb525a0207773048ec0fa8ebc5f00ca4ef68259e06d3. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/GMBA21304470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754a9098df1ebf0e6d4b074c482bebf87e372624386d38c78a4a87e0eaa1fc1b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GMBA21304472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642dfb8c8bcaca7dbf07f9bb8a24a700f660fd5bdc9d5352bd2a26a5f9286a1a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GMBA21304474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b18994980c4f410d775be38c83d060ea3a476c79cee738059a7a861069b266. 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/GMBA21304476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50850bbf1a006dde3e39f24afcbcd6f1a2300ab74ff7a07e4cd2216f7210d804. 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/GMBA21304477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2878600868ac1c9bb832d96d22f787a347250b8dfc9af2de26c3593a9ce635. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:20:08Z), 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/AUBEC1846350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158cbcd84390aec7a9afbb93f022c038348bd0aa7f2494396f2665d9c48654cf. 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/QZHNA2037237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2287da00bd691c1938a60cd833c68ec153bd63e5ad8c81426abb1ba1eda5260e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEM2091781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7adf5dd9f63b97cb4d75c891778eec5435d9917e3cbb8a6d819c7c83afd11. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:41Z), 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/QZFZ32204092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa504735e682ab06df3bc5ff6b8fbfd30b25bded1a792b57a9b1dd405edfe0c4c. 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/QZES62203015.