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 0x331ff044211c9f12c67d64564089fb009631b3945d1687e68693b26ff3ddd162. 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/6d28b8cd-a6da-41fa-9147-d2fe048c86be.json and https://artists.proofprofile.net/proofs/artist/6d28b8cd-a6da-41fa-9147-d2fe048c86be.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 0x1f312af6d11418e59dfd871fd2580178418dd62f5f4c32a8e364c52f8c2efd89. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPX2331665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91e5479f9a69725be646c7e275940d5554e6796cb3d1b8055f9d20ef7000a9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:41:48Z), 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/TCJPB2484915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63c621afb7dd4462b7f2e55c1d5b81b11d8cbb762370bb0540dda770881f2f9. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:22Z), 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/TCJPC2491492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e6a3ba9e1f4c331de88039f247980b866c45a767f25aca54d179e2d8672dca. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCJPC2491494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed543d4f0e731717d71508051ed99b4f578a212f36907c5a4927e997842b199. 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/TCJPC2491497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a9531bd7de06a7f7ca0fc475f44a26552cd67298246a82468b12d0326fced. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCJPC2491503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b13ee5a879fd63ad3ef0211caa3e7e0c081509a477a990d51a717c19f9d62. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:52Z), 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/TCJPC2491504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09214a4f2e81d4e915860590f0bab810781b48cb8e4f21e558e19411cdfb4d44. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:28Z), 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/TCJPC2491505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f4fcfb142ef006fb386ccf783a80897d4e5f0c4a7f32414896ceb2d292c98. 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/TCJPA2414616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd453e31f6a1b9e7bdfb008789bc562ae4d109b5dd3b30d5872a4aa8a801c3eb3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPC2491498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e5822fd15b4e7c05bac25e857a8f576d909e7f374b760384bbf69b2e808979. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCJPD2582769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b24cf0b19e5aa9803db1ee50a91d1d920a5d51638479390d9bb26555b15b830. 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/TCJPH2529381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a03cad5eef82b04d82fc4360915f215b9bdb9381200c5c1f2802d165464710c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:42Z), 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/TCJPJ2513795.