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 0xf8a2a6321e40e0c1fc8a14ca6150ce4b51a8f538bdddc05a40dcf863abc4dc1e. 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/8e170af2-af0e-4543-a7d2-f60f2ba79f81.json and https://artists.proofprofile.net/proofs/artist/8e170af2-af0e-4543-a7d2-f60f2ba79f81.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 0xa52bc2baadf2d36317a357900d5a5f94ce4995fb999426809b290dc283b320d2. 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/QZES92195533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509e5b4b7b38c2f7d08cbf9a7d6ba4ed354d8b548e7512a2ed86fb97a01abae4. 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/IT6KZ2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1cb71097f798c9d2cf647f8d127f83178f627773bd069863226a73142624a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:53Z), 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/US39N2205533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12de280712131a66979017bd61abc2aed7bee391694370c01b8c3d48245994f9. 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/US39N2304477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9ce5dc5c966909eca6a9a5b20b28eccac07179f9d55508f44ec07729857ce3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US39N2310042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a8175900237ccf8d7b81affb935623a656b7c6914d908865392020605d5376. 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/US38Y2305285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5233894e2bdfd04db6165293a7a9b2891ac10994e575dec9962f997aeeaa54c6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/US38Y2307326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952037dfb4a863ea9700ce152b4f3d41bd88d7519c08d4ab4d9d0e1068c78a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITUM72400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34270729dc9a729e387547cec729fb0667510ec2bfbca40d5e75db4d06368c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITUM72500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e3ac9969407c6dc7d95bd0090125bdae5e2719af37aa76de05d286ae4a94c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITUM72401364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952037dfb4a863ea9700ce152b4f3d41bd88d7519c08d4ab4d9d0e1068c78a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITUM72400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02678970da814bfceff476e4e3ffa1dbda308de084fffa690ce4b15067a665b9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ITUM72500579.