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 0x3f7e5785568633668284e11fcfdac2a0bbbb26fb5d10ea80ea74009cf4c20462. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e4cc65b-2aad-4b7a-bec9-ea8512d06cd6.json and https://artists.proofprofile.net/proofs/artist/9e4cc65b-2aad-4b7a-bec9-ea8512d06cd6.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 0x0a2f0960264204efeaf8926da17d5e9737808ad6d682cd7f31f470bc59dc3bc9. 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/QZMER2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd4cdd13b51222be9ae3438f52a6084adcb940fa451cf18df7e80a8fb97a55. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATJB92400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb208e6b6876efaf45b88e8097b8d57fef40d7c03774c9edea04277dbd647ab8. 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/ATJB92400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7a7db7f83c1c3b8965e18bf921308e049c160347fe9301ae630aa388991c10. 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/ATJB92400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467a350cf633338d837bccba5238bfcc1b041111101a63c678c1e0c1fbcddbf9. 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/ATJB92400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd764772738a84ec4365041431460db9301656969197be958bb68396b68fa0b. 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/ATJB92400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72d794ec37ce06d5cafb221364984018c56840a430e70f611655a568fb00ea. 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/ATJB92400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd4cdd13b51222be9ae3438f52a6084adcb940fa451cf18df7e80a8fb97a55. 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/ATJB92400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48092b5e052a56f3e3ac37bb2b1c814cf332ea2cd8cddb67503e651ec0c8d35e. 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/ATJB92400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e008aa9e552c3031f7e124b700856788bea93aff26998d9dbdc41370d2aebc. 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/ATJB92400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb208e6b6876efaf45b88e8097b8d57fef40d7c03774c9edea04277dbd647ab8. 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/ATJB92400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72084ee159a67ef084c4cbf3900030a42f1943184e9b014c9bc3bcb61d6799b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATJB92400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143896c1167892d7b9c6563daabe1e459c8ccbd939f9360f769e0e76f3304734. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ATJB92400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa42254b369077dcd257a04fccda6bb425df78bd59aff5036fcf62a25c60ddf9. 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/ATJB92400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6ce6fa4438e0f0b4e27664e4fd5335c4b57d617193ab990e37984baa45c1f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEPI82402600.