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 0x7080af82b196d9a462b64ee6882a5a1c81af776f4311ce229d5c0f1aa26f14ba. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e86f493a-ac4e-4ea6-abba-837f62526c9a.json and https://artists.proofprofile.net/proofs/artist/e86f493a-ac4e-4ea6-abba-837f62526c9a.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 0x79f4a5b076be95f9c541f6de1f9398e66719bd05747ef7ec4efa977cafa7b13c. 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/PTSM19300001.
Vais Pedir-Me p'ra Namorar - I Only Wanna Be With You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe0b39ff3b0f6a77448e162446b7807f9011738cf13120f081dc94ccd42893. 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/PTSM18900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f4fb64f2c23012c2a2d9f8dc9945f54f866e2bbb6a45e0737ffbd71e7ea174. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/PTSM19600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96735cf23421f9f28539bedb13b7c5ad4fc6bc99c8be879015cd0cfe7035294. 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/PTSM18700001.
Bikini Pequenino Às Bolinhas Amarelas - Itsy Bitsy Teenie Weenie Yellow Polkadot Bikini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cc5fb06d3038aee2e9da97fcfc790e0da3e03359129c99914f359104d2e9e0. 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/PTSM19000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cd38697a922814133bdd842194f446ff6a2c7ac4c0d809983340067aa038f1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PTBM11600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b50aaf551249cac341b06a4476b5987d21545e8760dc130cbd0a84e398ef972. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/PTSM19200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9403247044a5e2b426b68239b9acf8181c2323c33be048eadb22159e89c23680. 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/PTBM11600129.
Ela Só Quer, Só Pensa em Namorar (O Xote das Meninas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c4dac2f2c5c742ded3752ab3a7ce8294a9c9be5a74cf5e2e698d7279913abc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PTSM19100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ec9b627c65e50c862a17dd814088ea3cc8185e8fc765c8674ab3b42cb2e119. 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/PTSM19600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb973321511a2f782da7dfe4f4867ba8ba165c665aaedb39ded1b3690aa102bbb. 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/PTBM11600130.
Sinto Saudade - Have You Ever Really Loved a Woman
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb667b67aff234b70f55fbad7e64f6fe9311d1b7bbc660940bdbc5911758f39b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PTBM11600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530a2b79d66e63036a711ffbd9b3c9202c77610b42d83e6961326196e75c47f3. 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/PTSM19700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494e47d735c928d7a644f8d64fd11819cd5853b01f614b3780a053c01f2eaf2a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PTSM19400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d4858c3265bc0ca236eddb4adf6b4ecb2bd652b7c04658a16e78bc82862adc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/PTBM11600132.