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 0xbef9443135d8158cf7c379145c46b15be5c702dab4c4e6727d71a08cdfafe459. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aedf6837-4319-4114-9f9d-590bffd54eaa.json and https://artists.proofprofile.net/proofs/artist/aedf6837-4319-4114-9f9d-590bffd54eaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mpb Brazil: Brazil, Samba, Bossa Nova And Beyond / A Nova Canção Brasileira
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 0x4021ebb13060ded13f2747d59c8fd95c1fb8ef2792ddf3610f2fe0de7d541ce3. 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/BR65W1300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb52b2a7d6a27bef766aa7b1dd9ba1a5112c7db1440baa4cbf96c37a45f154. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRTVC1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17703cbe156dd38108bfbe0841ae5d5b0552afdfc5a2bc985309191feffebf68. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRBUD1300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c2bf3d021bbc506473b4d5adfd7c565c792ff6773cff49b6a4e4096b3e6170. 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/BRN401400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38feaf560ac6f20ef851dab8750b6dccdc1b39ff818a9dea31ee81490d38348a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRTE01400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da013a361e1e714cb45ecbb69cb31977db92121f1fc5902a17ab803ec8d8b40. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRF9J1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea03c654c5c7bbc1658e54b015cbad19bd03a9ab41d514fc6d180551418cae01. 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/BREU61000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc416eb4e25df578220a59b42c64c432189695b2dc1e476e530f25973c6ed69c2. 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/BRLBC1100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d53271619017a5b6b96ff211d0509b8f13718ad65fdf6c7aeda64bda2c12c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BXFR81400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41eba92c2bff12e5ec4e46e5489462bf2c19247a4961942b44d9383d9d8c931. 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/BXMJE1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60474f41516bc604bb59bc7afd7327abaa1ea6e9674c1bc9e687b6b252e7068. 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/BR3CD1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4dcdcfa9a6fb98df6b75beadf8861484be99467203952a678b6934d946016a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR2BC0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c8c9f4a3d7a328eb14934ce7d1d7b41e4e54df3e95aa5f3b306d0e991d484. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BR7EU1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d4fdccc4c1ef0bdec0224d210965ab1ccb0d6c187f14ec42367aed53860709. 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/BRZME0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0397f5d4914a66fa6d6efed764e4ada0f8732a3fefd808cb06ba82bb6acfa94. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRTRB1300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92a3cd8aee2d1510e90c7c3cb50171b349b6609fbda8edf8f054daba09e1fdd. 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/BXGGT1900015.
Paisagens II - Cantos para voar com o coração