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 0x0ab3ed1cebed3d00818072cdd5149f4d373220383feee4be6c91bc05819e535c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b80e7163-3c7b-4949-a4db-b05c8812cf0c.json and https://artists.proofprofile.net/proofs/artist/b80e7163-3c7b-4949-a4db-b05c8812cf0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Candomblé Angola & Caboclo (Edição Bahia) (Vol.2)
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 0xe42928291c3f0c1640107d99fe04dc96ce786431475bf3bb041444e65665ed4d. 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/BR33T1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2656f33c78bc14819f7fb6b61e5a21a181f92d1e1b166b316353ee95e8c9c7d. 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/BR33T1900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31a5b3de9193d4572ab98be97b554f50579eaa59abdefda8cdf80b444ba0d8e. 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/BR33T1900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7b147f1bd29ef65a194a6e189d3aa6e823a1c7df035e54bc6a6b4119e1ac5f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BR33T1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25575c0309465e3a0ab73707687f745a89c14d362f79bb152af11ce4b0792164. 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/BR33T1900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a9efa4b98ef1ff6b610c2aa7fe7fa171590cdb1a6de07873ea02e31b9e5fc4. 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/BR33T1900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913094c2d6f3cce2825304e1aa47e96b026f09c457700dd2c6055c4bf7e4d711. 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/BR33T1900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c5102c321f85e061787e8ceeac8c2e21e5094c4ff17649ae541153e38e706. 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/BR33T1900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7047f8937a550835e30fe02dd176e4c117a252a1e185062bb5f33d1d7beb9b. 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/BR33T1900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49bb87aad41c55e5421e758b20f8d8a3dc599cf2cf4bb43490140b7e6d8ea83. 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/BR33T1900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481a395f8026d7e512630325f9cb38db0f7e9365142ef6de9f6609e0e456aa2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BR33T1900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce6c9c98cee0519852ad37ab8073c44b74dca4c99f02a08e540f82036d4c901. 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/BR33T1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1784986d254d9bc4dac07362b4e62ba4a09c8b278a08c3032c93b46b65bf6c14. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BR33T1900090.