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 0x0f6966d3d0ab76d1f80c895ea6bf26786223891f845d0b2e41c695647c653e4e. 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/a81c99cf-1a1b-4171-86e6-86bfb66f2bc8.json and https://artists.proofprofile.net/proofs/artist/a81c99cf-1a1b-4171-86e6-86bfb66f2bc8.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 0xfced19fd554e93f167201e0052c4057ea907104ec07e593414bfb19d16ff87ba. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:28:19Z), 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/FRX871529359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c55c35d2bad00d20767f0ea47d8ca3a33ae9761e5fa7f22d8be62a0f459f2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR96X1857367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5ce0fd2fb2f2a2b71ee732b7968093f3ee511e755f67909b515d0dd54a5ebd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR96X1857171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e5c9bd2258430f89fb568d477b2243684964ee481b0676df2e14f3895b875d. 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/FR96X1861038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3fcde32e6b7da2023c9489da48f4384c25ce0fa7b4f1d0e9d4df5987baa6fb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:26Z), 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/FR10S1911836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d100eaa022af50ae765ed9d9f1cbd7da0ac985c876fdf082f9b0d7b11bbcd4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR10S1911823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7a96d07d358d7c80e2e32ab37f20dc44c179dff0c21572cbba2a1ca4f18d8e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:37:25Z), 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/FRX762011505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9dfaf0f8e6469ead629360e71025f1e4f09db0f1bab4195efe36fbb6eb782f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRX762011508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90db17f88a85b25b95be68a5a1463658960fde09af6fe640d0233ad9615e05c. 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/FR59R2177674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2b2ec8cedb60ee6fab909ff11b1afb6ad82d0889f3f38c8618316125d38d10. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX282270695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ff769a191070ca1089c8f18ca3331248439f8168677019e43e22b097ce3c26. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DGA0Q2370260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b9741ecfdb699d72194ea61c5886fcb9dea2eedb2069f79c296afc56a2b39f. 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/FR96X2206019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06508ea6ce732f4577f5dba7abb22cc99e63a77ad20d69c5758a0f1e46e442a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR96X2206017.
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 0xf58a869f41a207d521729a24cfc061fb623069b1ceadeff5e181ef1e47de3a81. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR96X2206018.