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 0xd88dad0f07f47f5628937a30d16361d03a58d1784bb493b20fda5ee9d34fceb0. 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/34123391-5b81-4289-89c1-83319e64e10f.json and https://artists.proofprofile.net/proofs/artist/34123391-5b81-4289-89c1-83319e64e10f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Oito Estações - Antonio Vivaldi e Astor Piazzolla
Come Together (feat. Rodrigo Toffolo) - Ao Vivo
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 0x2c26d3f42920876d8cdc1f97cb485273ad3b49d9778200c45045251c656516cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRRG1400088 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae379d745e586287888c450ab506e30298918ffe80d363384505fa7b96beb74. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRRG1400130 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c103ded5260a60cbcaa8a89f2fb6066820fbaeeb76eac7b705cb9eef4993407. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRRG1700001 — a six-check JSON result.
J. Haydn, Symphony Nº 44 “Trauer” - Allegro con brio - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705c6c73669aa20cd5106b44c57ad722a3fdf041997f4b1a59027d592e5fa0ec. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRRG2100011 — a six-check JSON result.
Take on Me - Orquestra Ouro Preto Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed9e957955d94d108698585a1449220ffb5fb2b766b3144916c9f7ccb7e4f4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200109 — a six-check JSON result.
Crying in the Rain - Orquestra Ouro Preto Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb2269a70ec152cdf785750e1ce3990651c88b1cd42d4334697da413446fdff. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200111 — a six-check JSON result.
Maybe Maybe - Orquestra Ouro Preto Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3aa0504eb28ad33998611ca695e27f8c333c6155cf226f4f760088cca7d462. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200113 — a six-check JSON result.
Hunting High and Low - Orquestra Ouro Preto Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c7e70df8a87c47e8c9085b651aa2b4649135413edc95c29965a0f4b23172fc. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200116 — a six-check JSON result.
Stay on These Roads - Orquestra Ouro Preto Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb463ed82adb40069787754cb16e90dffcd14bfd691fda3ec8ce5c9494dc913. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200120 — a six-check JSON result.
Orquestra Ouro Preto: Vander Lee (No Balanço do Balaio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d3855db238308049db7f24a1db4b290234c869aea8563a6e8528cf539858c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXRRG2400054 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60bc517b4f779f8fedb31f757da8aa3e4f285a3bccfc4d79c08d29f3c818983. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXRRG2400058 — a six-check JSON result.
Villa-Lobos, Piazzolla & Mehmari: Orchestral Works
Bachianas brasileiras No. 9, W. 449 (Version for String Orchestra): I. Prelúdio. Vagaroso e Místico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ad1ac2f2bf98161f73ac0ca7ca52fdea96608a4d11ef0aa71c8e1428a0e47. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXRRG2500001 — a six-check JSON result.
Bachianas brasileiras No. 9, W. 449 (Version for String Orchestra): II. Fuga. Pouco apressado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2adae1447e850eb2c38ff023059cb5363748db0ec636daa94be86a7cdaa41e7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXRRG2500002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2e7c91606956ec2fd6fac008300fe69f47bb843d59f0c88a76e7ee708d18ca. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USC4R2442822 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcea36280e2631dbb94862fcd40cf4f3bddc31bed49ed9c5d22bda78f06a288e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USC4R2442825 — a six-check JSON result.
João Bosco e Orquestra Ouro Preto: Gênesis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89c893729610cfeb1a611595df300a950e062874925ed10d532821737282c5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468162432348e349a4a70da32bd4e5d4e4e6db4c428fc495e79b7cace0a070e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUKM2200021 — a six-check JSON result.