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 0x0704b808ad79fe7e101b717c939469bf6ae8a1842ddc4997a1772a075fe4521f. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87ee56f2-60c9-4822-850f-5101b4f8ac59.json and https://artists.proofprofile.net/proofs/artist/87ee56f2-60c9-4822-850f-5101b4f8ac59.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 0xd17ecae4a7d03678f4c11f9fa9860b54420ecec48fde0f87867e21fc8a54f4ba. 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/GBELX0400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a1c91cd7d2ae829657115363fbd75434e2c330e4b19808a74ca482be09a96b. 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/GBELX0400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d867414dd6e4b148e3084bf824364351cbf8b5e94c1dc794e1deb7db12651b. 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/GBELX0400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e10768923ad18db40cd02483ee0569c9b1e081c5835462f28b455a23fa0ac. 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/GBELX0400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2210e0c772a7e167d209d64bb4cd3d367f2bebbb553a27e079b1f921d18ffa0. 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/GBELX0400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe890686ffc8e706220074551091a2585dbe3ab96205b1fa1911071f50484728c. 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/GBELX0400736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b06484044906ce96b1bf3f8c75c846e8e9374ee85c9ad0c7dbe91ca9b32755. 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/GBELX0400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e0d292491db5a61d04f3d1f57eeb21180e649543a1df5ab5269c5d5355204. 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/GBELX0400743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaf070a2901b2850161b405f282c2dff5742b03530294e090d024e258bde1c3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBELX0400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44addb6503096ff3c07bf87d36908d580310738f0446c883d994c1c4a4fdcf79. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX0400733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cefab0c1b401e0921d3be4f21565a466b21ca833b03f49e42d3972681f4ccf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBELX0400737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1b64ed2a50e0669dd799da4ef399e74abe8893eccb7c26e29aa10638555200. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBELX0400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389d3b6c402c49b31ebec4a03d12a237b901022e88ba5d2c7614fc31e3250e22. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX0100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbeb2ba86289240b62f8a0ede1d0f4af840b15535a7ebbee1a143ebc736039a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX0100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241f58a465d017ed20af790408068dd040ed393e4dafe9508dfb90719acf998e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX0100158.
Hans Neusidler, Ein newes Lautenbuechlein
Cifras Imaginarias: Música para Tañer a Dos Vihuelas
Pur ti Miro from 'L'incoronazione di Poppea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2984895309295ee379cb0f2efd94c4a3066de79b13b06a6b3869487161a02a86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM10310668.
O virgo virginum [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Anne Boleyn's Songbook: Music & Passions of a Tudor Queen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5d8dae1877295df0c4bba0f14736d483b70b74d80215bfed12fd5d3f3429c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBCJG1402106.
Missa plurium modulorum: Jouyssance vous donneray: Jouyssance vous donneray
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2879f3cc31e15a0fd8593932be23249534a6461313e48d3e0fe7362f871b768b. 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/GBCJG1402112.
First Booke Of Songes, 1597: 17. Come again: sweet love doth now invite
Barbara Bonney - The Radiant Voice of Barbara Bonney
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf75c9852cfacb60bfb7166303e6e7f4416fad2abc771b2945709502612e6d7c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBBBA9870101.
Venes regrets, venes tous [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94103af2626f3330ab24d8e9e05b832282068849e683de5be24ae2f21a203b6e. 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/GBCJG1402100.
O Deathe, Rock Me A-Sleepe [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d72d6a91aaf64bfeebe5bbd809280966ad8fbe07f74b56bd0bd0a225dbcb4b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBCJG1402117.