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 0x887d4284c9aebebf9a59f4ea699b332522dcd7d4b55859add0dc488c1eaa71d7. 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/33a27744-53b9-4f49-abb8-2c9ed1b0e180.json and https://artists.proofprofile.net/proofs/artist/33a27744-53b9-4f49-abb8-2c9ed1b0e180.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 0x0e2e6207f490b659b374fe2c937ace2391bd742a3801cccd1d23a6310b4e52a4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PL44J2490764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0866c598f1f08c6b50cdd1e1ff925d10764ebc871351e4d4f7527a2aa907570. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/PL06V2409142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bf3be3ebb8d5930caa781a52126e4dc3bda41c5be27d62696135bc046d584. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PL06V2409144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eda24ecf5084a7dff0d782b8a8abc1715311ae0ff9335744935dc758b44615. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PL71Z2445424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fed1a800fe9a562b700679241a083c2dcc1e29437d057f4350eb2955448be9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PL0B62492511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a650b6ec29ae8db99f0f7a9e9f1a97e5387227f9eff384a570818592c466f0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PL6B02403746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fed1a800fe9a562b700679241a083c2dcc1e29437d057f4350eb2955448be9. 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/PL0B62492511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f5c41672ac9502943df838be1cfcdb58f9e7b9f7630c578421cd6d3d32c4c6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:27Z), 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/PL6B02403747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2764cfc365c5c3837053be9fff68df9f48f4d0a91e6619b9d658db138fec6eaf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PL6B02403748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073ebd68e47e1153e3a2eeea3d3c92113183eb67fa32099cb8a7828ce28331df. 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/PL6B02403749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdb9e6186ac57c402dd28bf3e388b5e2fb7ccb92adcdfb688f193f9a842c57. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2X41543126.