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 0x0315b63bf9928e002ff294e5a04fa47074090695a1c646fad6aeacc615568f9c. 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/14de2a34-9419-40b2-887d-d3ffed77877c.json and https://artists.proofprofile.net/proofs/artist/14de2a34-9419-40b2-887d-d3ffed77877c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coletânea Belly Dance Orient, Vol. 72 (Ya Msahar Eyni)
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 0xe39c2f7922eb098ba66608683c9e41141030aa73e4699b5fe0253fd4769a334b. 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/BRG721601193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6d439b71a4bed56493c0a18284b98be34d1cea165861878ec39c80b102e729. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BRG721601195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b476b4f5105a7bd715afdf7f3edbd29322fdfd3a36ec1c1e17d9d0b30c3c95f. 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/BRG721601196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95c8c00cb3d19f2cdfa387e828f3a9bba6055d78c2e222647d676767f6baf1d. 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/BRG721601198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c997e9056352a3b28e1b137e9d98ff41acc531fddab842e39fbeda28d892a56. 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/BRG721601199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c04aca0982fd3a2a9c16160fc285389e373b5f66224e2b99eb6be88e0206905. 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/BRG721601200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b06a60b2b565683786a7a7bf0742ec5fbccfc6c8fc93c9944b70c363b43e06f. 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/BRG721601205.
Coletânea Belly Dance Orient, Vol. 71 (Khidni Maak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd7912ed75e7c7092063811027532c46ce72cee10cb2ef0890e082bba17363d. 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/BRG721501243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21685647681de3355646259c8f0931d3df59765d6c3d59941a24e87a84a1130. 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/BRG721501247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee12965e0f8b7e7e3937f218b702bacc96ae24167043e3bd33c5ab83391c5f. 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/BRG721501249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98291ba287ea42b753d1668c1caef4f535fc3d97ee31debed66104dc6defc0b1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRG721501250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d206939e33fe55a023c9ca737cb323f39a638d0a73b869f7f1dc04db6c22cf. 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/BRG721501251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b0ce21b522d36a14c5919a88195d372ba1fe54f7f1cf76d0a655c6fd9aa5a5. 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/BRG721501253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2505f05cca4688eaa6446f6403cd4a5bb253f410434aaf87457f46a7b8b2fb34. 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/BRG721501254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bae3a81ef40cafa3750b6cb5b801aff53ee471e91a0d6f2f9d07bf53dc35c4. 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/BRG721501255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c33e25248abbddd7e217607fd28f73629890678548f921d0876ee0da0a8d00. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRG721501256.