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 0x921c814f906069a83b6aeb6934366827473c6047815c758c562f76d6db0cd1d4. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abd40eb5-3155-4d27-94b8-82b1ca5651ad.json and https://artists.proofprofile.net/proofs/artist/abd40eb5-3155-4d27-94b8-82b1ca5651ad.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 0x1605c7e89affa95bf2d51be4d01b95a038ec5163f1bb34e563334c8c26c5ecc0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRTRB1987212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb436da0a31de6f3252b3b86b20fe35ed21eef9e399053ba870bcf10cfecd329. 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/BRTRB1987214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed2c3905d6bedc3b618a633911ca3136b5632bdd3fd8c87f23d239ecf9cc3d. 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/BRTRB1987216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d36655525a02ab4f137e0c61828683c26f92a20cefae237ac6d188dec1b61c. 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/BRTRB1987217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e3ca7ab019928a6294e204896b4ba8f49223a2fa27e26215ebd5e3b996a847. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRTRB1987218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc928113b8b92dbd7830ce1ab7700311ad977c644cceffec3baa7c62320baa90a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BRTRB1987219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651a5f7ca8c34680b8abf599bab2e98ea7c1afc5b4afdd2cf06419231af7f8e. 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/BRTRB1987220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75aa12c1f658c515ba36dcabf411d01de8140befed12e56831ab6d6e53fd187. 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/BRTRB1987221.
O Mestre Leo Peracchi e a Jazz Sinfônica - Canções de Tom e Vinicius
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a88072605fd0560469adbdb08fa50aa0437162a035b73c7adb52997f64bf7. 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/BRDPA0100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27173931441ede04e7bb3d91dea2cf80019e0e51cb639c095637895251a8d6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRDPA0100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee1ef52ffbc2d0fd8a4b96a9921532aa4163d9a05b5dba898ec6c570126ebd6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRDPA0100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a8c14d03f67c6e7ff78d7f836958ad8317842e9350b7a645ef3d36d6b2d3f. 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/BRDPA0100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946dea8369808506a4427b22e68082811f180159b6d62991276327e699385ec. 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/BRDPA0100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26360f17ae452ce9bf5d0918fbde5c7f551bba06604e82ec3242464ab9855d05. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BRDPA0100038.