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 0x0c55f58af5f8229ec805fedbcd444f0d9f227c17e0d19227e2eb0b9dde7aa43e. 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/f3097921-ff80-43f8-95b7-f95d19c663fa.json and https://artists.proofprofile.net/proofs/artist/f3097921-ff80-43f8-95b7-f95d19c663fa.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 0x4eb1ce913efaf50b8600a8b9185382400497ce8e2cacd40701e7796548502a6e. 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/QZA742422698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb1ce913efaf50b8600a8b9185382400497ce8e2cacd40701e7796548502a6e. 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/QZA742422698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e0c7ba3c50b98a72e13531ef4c3a118a184deda34f6e7291e4381158216cac. 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/CA5KR1946956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5fa2272e258524a360af260ab039e51696a31d00f9c290752c154ace59f0b5. 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/CA5KR2099380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2fd8cf6f22e340f47c4cc72dde16026f95f53723904b22b3cfb6517b0ae2e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZ5FN1770827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc313d5e17817c65c41f01deee4a023920e6fad6457b98fb98b91d9d4b7b744c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1962331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed705b1af32b5f0c50186b92bec2d334e6f82cbb0d0440df2148bff6a6ab0f3c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1976015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a52caef832f2faf3ddda0c5de4aa5fc36f3c52fa155cb8115759ac80342633. 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/CA5KR2177599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e3132a35694f5cf282fc58577dd3e81053ec9f9ca619e56ce4d805fe9c0b0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA5KR2099394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e0c7ba3c50b98a72e13531ef4c3a118a184deda34f6e7291e4381158216cac. 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/CA5KR1946956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0b72847dd1947d2b5bb514036ffd77c7ff46c4cfbac5a28c969a03b4fad765. 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/CA5KR1946947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5893f387991dddddce1255364b36ba51329f59887072e6b9803c4e38fd57d4f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1908486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cb79b11e6b8ff94af974abf58ecfe670b2b615a532f301f78763fcb2301d14. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CA5KR1908489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd814eb9963900acce2bba7c09953e2a5ee500590d76cdc52baaa6da7398ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1822149.
Riddim Toolkit Vol. 1 [Sample Pack Demo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af7ec3e17567b8706f7a007172f0c4174c17b9d4b19f7290bc3eb6103fb237e. 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/CA5KR2172453.