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 0xbbe4c6c8bb4077008039a64d77c11f093de2c8967922f7f9f15ae22de9a1d420. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79beeaa8-a0f9-46b1-8b03-220c99840015.json and https://artists.proofprofile.net/proofs/artist/79beeaa8-a0f9-46b1-8b03-220c99840015.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ravel: Piano Concerto in G Major, M. 83: II. Adagio assai (Arr. for Trumpet and Orchestra)
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 0x545235e631aeafcd5c57950bd2f3e61d332b6208214d8c2371bb4afcc3f4c799. 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/GBAYC1402148.
Three-Piece Suite (From "Powder Her Face"): I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd3f95d6644a28f4f0596d5594f712a373c8c1fc213c0152007184d2aff88e5. 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/GBYDS2500155.
Three-Piece Suite (From "Powder Her Face"): II. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaef77cab6b889c6e149f50bfa89454e55a571664e9a542795d0db1da0511b2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBYDS2500156.
Three-Piece Suite (From "Powder Her Face"): III. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58a8f19c43fb3d9ab46842bf9cfd997b05686204bac5d30d8ac9349c641cdea. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBYDS2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb084893f1ab9ef9df745c11d7ea3c41c9b96ec1fc2ab4e03806bd5d7dfc98d80. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBYDS2500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc883db8a804169ba6bd9e1c882fb2e81e21e324adde202fa132fd9cf5612d8. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBYDS2500159.
Stargazer: III. Arcturus and Canis Chasing Ursa Major and Minor with Lyra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009bcecfdd63c70dd494ba8b6b69cabe700979b0f62bce98d0e1e47ac25e2fab. 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/GBYDS2500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa6e48667658ffea7f3d335dd522102967a38e5f1ecbb25a3074c8ccf1c3b65. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBYDS2500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be5681c26f76bb4130c88e8854bfeb133df20c3b9a1bb2bbf1c9146d9a64455. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBYDS2500162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95683052002df91570670181211840c77676d4a437ee393253ee24f52b9afb5f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBYDS2500163.