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 0x22107b88aa3235ccadee935389fee19f8e9fe1ad86771696385ed9f12100ee9b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac4f8119-01c3-46fe-afde-6816b1a7e36c.json and https://artists.proofprofile.net/proofs/artist/ac4f8119-01c3-46fe-afde-6816b1a7e36c.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 0x14095f5e1c11322bf7d12503980e49950938582c3a6adf641462430a0b348503. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:09:14Z), 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/USX9P1250989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44223ece6dc92bdcae93a7f2163a72c4c516110d216f054724650a5638fa6e7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH1090183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fc3338fc1e64793a568a92c86d74880903cd3042887c67652906c404f270f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH1090184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea267f7c1caa0387a034b8791768dcf1878b538eaacdee1f4550fc001ad3d5b2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGH1090185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65654743942675f3d3789c4319d0ac80d27e81f14a93ac1f589b0c3b55538d56. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:55Z), 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/USCGH1090186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1af0f995d881442066c34c3f6bcb219c3ab20d9e05387db1bc9a1e6508f68. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USCGH1240616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8abd14ae1c650c2ee2dc72379e474d00fce9755edab4ffb0b3b59abd91699d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:30Z), 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/USCGH1240619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e03e684461065c73dcb53b7c367b1cab127ace50e6f114ca9f53e68c8f74d9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH1240623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe3c7958174e47a505069dda211932a976b4856ce8d70d81651b6d71c1e05a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USDY41590697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71f339e6e4f1fd1856fa13e37c4acab5550714bd74ac3f8b2ad538ac65b5a1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:44:59Z), 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/USCGJ1941891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd613bd7211288c4e3336996bb51583f969041c034dbc34da24d1846e342f1b93. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4Q1911935.
Magda (Magda Brown's Journey from Auschwitz to Forgiveness)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe73cbec4cc2b870d0051f8833122067b4098f36cc34f1931781ac90bbe9c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY42297183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2383182afeb1a921e7d5c9c94a249075f8209eded2da8d392387623fa4b568ec. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4R2397847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0283276e1265f995c65321b4cf31bbf080e1e3e1a5ab03ec3bee829bbae39fa. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:36Z), 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/USX9P2433989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a519476ed12acba663e01986c343f60b1c4f7d659820c6fa84aec8d1a8eb3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USX9P2433991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359fe3ea7a74b74a13f3c266a0718daebd7bb6ebd2f43303ed6b70ca24b937d4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:43Z), 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/USX9P2433994.