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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d81b97ff853206cd780dce5d1e596cd1fd698880f7104c4619a782858bc10c. 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/3ba9d81d-b204-42a2-86d0-cc90461a57e1.json and https://artists.proofprofile.net/proofs/artist/3ba9d81d-b204-42a2-86d0-cc90461a57e1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36decc90c01a4d1f51d53f5f5df1ce793bd1f75013440f50fb11993197c8ee8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7448cf0934aeb079f51c404616cb904584f30463e294bbc95a454968b9bd93. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c3bb43d24dd7211c542f41e15d42854b45d30ea9e39730587ba590154602bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435533a70a1688db348089dc5236632d3d2795bc0a9f0f5fb7c5d38ad3d4026d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b87f915db690f815cc6696346d7356e40060cc1e1e5f94e25257f96b5cfc8. 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/GBLV62303755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa0c29c3f5f19f74e78b91ae00d2dafd96007a7c4e9299866d58c04d009ebd1. 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/NLT2H2300635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb86d4f824d2b7cfea0728f01c0ea61212cd71ca21a8e7ea5049dd176376c6d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:04Z), 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/QM4TX2301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05a4d3d69fe52d0fd16aa1fddc85c6abd5aa0ec6f29c12a08cc5dc5f9b59d67. 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/UKA9R1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca50f4e9383da23edd8fd911ddd91f296ec2d6443bd6fec173a19c8bd914e63. 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/UKA9R1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb34042973175972ac4a1b57bca21a237bc0b0eed9454e8d3321fa0cfd88a23. 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/UKA9R1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001db55eff99d626a56d004bfa862c696ab102ea55aa47bd4bedb49386db2762. 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/UKA9R1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aad8745d8f4bde1bf21cc5641da7a13eca1de07bd501562501f8b9345998ad2. 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/UKA9R1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3190ef8aa37d7b7c3e82c92160d9bef88bd16cef048463418a8c7048f7fbec50. 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/UKA9R1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6649a3da699b17b50abbbdc4f3e1df63380753cc2cd66ed7245e1812f0c4c8a. 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/UKA9R1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1396a2afeeb4d7f04f6dec07ef65003b00377754756ed4b86fc2b6aba7cc4ec8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FXQ892400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9996f978d15043d5071f4f066a3ede5428ffabf4aa774a8ee738d7c96efb70d. 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/FXQ892400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e4fe71d363316752a335d3f8708b8730d7c1244ce05a08a9c3bdfe76237c1c. 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/FXQ892400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a75898c1dc9d079bd93c79dc14f8ba3c2134450d02cf4a75ac6f02e5238e35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51bce741763b2627d11c7fcb6e02d15fd35a663fce94c1cf45f455bc02e4bbb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2546b92030ddd2f74f269c1239e331dda20ad2174313e272e81cfdaa26c8e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02858909c94e492dbff26530d45f80b7f938c59727a5987cb2542f657cd2fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742421108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8319852abae2584875ed83c34a571f7cb66160305026d8f3cd67b8f258d85. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX872408034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb08056065feb0447981022f619b0d059582b5e25eded567e4c7f69240e32f4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRR642302079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf65c11299fdf57d04cd62f1b6fe1f36d78beb7a32810de7f93eaecb532792. 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/QM42K1802115.