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 0x3652ce4ee588e9f147dc96eafa6b8ac47930caae5ee69d93cfc2b626b65f3b1b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80658478-3904-40fe-bd7b-0e34700dd946.json and https://artists.proofprofile.net/proofs/artist/80658478-3904-40fe-bd7b-0e34700dd946.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Africa Express Presents…The Orchestra of Syrian Musicians & Guests
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 0xb9e18484915b8c98ed5266f62a923589ea2256c0812e11cc4198a987165aefbf. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GBKZV1600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd552a78ea43d91059c41652bf4ed3157e386bc6a2f46f10df5bc612ff948c824. 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/GBKZV1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c166238cfe018a927ce2fe3c236aad700a549fffb7ec1d29cfc044d402cc89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKZV1600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9527bb9d51492f60992790c9f699edcb1dfad7312f0f270134a25b26dc3144. 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/GBKZV1600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5126469975b23e65c9ad52a1287fdd0b8c51d7b388a0d3cd4e88234a76d2ea. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKZV1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b881b23a607be4a1ff2ed89b8fee94be495073deaf404b1834781b52a44c2d2. 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/GBKZV1600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde6929efa4d3c6d21e922682a6138138c0adcfab475830409bb8618beab18ee. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKZV1600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7ec9bf0c186e3d91b462e98f547a3d3559338eeae4615046df356a0b7525c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKZV1600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d13a05a183bd7e06d35ada25feb6cdc384b60e8734d105b772ec9a0e91bcbd4. 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/GBKZV1600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65c6812fad621f03a961903fd6cdf76511e090980d735eed6eaaeea7a5c8b75. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBKZV1600064.
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 0xff15bd83b5cdd134ad659f60b9c1db7df2cae996bfdaa39c7f5256f1ebe84657. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKZV1600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fc23d3fb9827ce0cc07b16cbb96fd7c96b10f46881a396859f24407789a7b8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBKZV1600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d00fce7ee66c2b6d20b423e725fd42faadffeed90a0bde03e6be8aeafbcb93. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBKZV1600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb654d074009d5369949cad75e79091d7ad63385b4b5f3532c5d2792c80bcd359. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBKZV1600077.