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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec6af84b520495a51df2293790f38af89985c7829cc4eb4dda44b9066a21073. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22853a20-bb0f-41f8-888e-496c26a0d426.json and https://artists.proofprofile.net/proofs/artist/22853a20-bb0f-41f8-888e-496c26a0d426.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8832b9a09b57e15c403303f8bf29f90e55202ebce998b3b7716c814a32a068. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PTVC17500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0856d6b3ad4e09017b188cb8b799e1e088840b114fcbe9b86156bda83d6e659. 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/PTVC16400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583d49a3c29b596d1d3cc4b3da62f2934f4097b371a79c11c96700e0024430a1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PTVC17400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ac40491d28590c05c08d0eae187d10d15ae08144111d4b59ab59a7655ac7a8. 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/PTVC16900092.
O Alentejo quer um homem que saiba mandar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b53395287a0bf1f42dfb2de1edb988f788a620ca041b6559522bc525df4a76a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PTVC17500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd98cb26947d9be43c5a5865a4ccb49d09d1668a2a2f30c6d292d969e883e78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTVC17000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a90a4feb470adb6e2d219fa5b5f7a95877bf84e47addabd9a2f1ec5c8c19c0a. 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/PTVC17000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e2ae71ced3c90bc30525076bf57042733f6354d11ef5c1abae3bfe6daabc7a. 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/PTVC16500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc284585889a4b01129e189de77c14e0f48ba52fc475902d6bd029a79e332348d. 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/PT0IP2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d79311a89492b10284147400c12dab6d5a5a427176d52e56af3384ce5dd08a. 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/PT0IP2300021.
Portugal Deluxe Volume 1: Um Cocktail Estereofónico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb41e2b2f66cf581e5cd146f04119e188bf318409185f7d0b339cb0eae70d4. 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/PTVC16600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a90a4feb470adb6e2d219fa5b5f7a95877bf84e47addabd9a2f1ec5c8c19c0a. 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/PTVC17000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52266d66e34d5c85386d09baf6068794c151fbd7778b9c202a95bf97b76c2713. 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/PTVC16700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa156d3ff9b58af64e5526b185937b7128bd7e55bfa0b2e3bd8f1f2a479d07915. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PTVC16800053.
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 0x3df320984547945075a0e99fb7e4783c60b60c244e3cd6dec19e8bd154d5f281. 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/PTPY11800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ca84171997a92d22f6129eaf2065600b9a8fc47b8e4df7f6403c1902047dc. 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/PTPY11800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ee12a8e4bb48a9ece5167da05b5fa3404e57afbd81f68dafae066d8e8c390. 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/PTPY11800015.
Carlos Mendes Canta Amor Combate de Joaquim Pessoa
Os primeiros êxitos de Carlos Mendes & Fernando Tordo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f040ecc238c20beb5f731710dcefc361c0ac889c27571384f831405dbb72574. 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/PTVC16800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bb5e5b52ce37ae20549d63664fb65b223a88caae36696e8f64548a1a72a9a1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PTVC16900080.
Barco Lindo da Canção (feat. João Afonso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad43f79cfd04729058858e53e5a80231894d958a63010fed86d8641944a5dd. 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/PT0IP1900006.
Verão (Grande Prémio TV da Canção Portuguesa)