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 0xf0aa9418d78e21457ff68a4d9273c39135f805b49cae54700ee7776a27e55db6. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f2b5f88-16f8-4a4a-9c32-b69598f4658c.json and https://artists.proofprofile.net/proofs/artist/1f2b5f88-16f8-4a4a-9c32-b69598f4658c.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 0x7824b85da96392ac86dfcfe29426cbd28f741a6921420872aaba811bb74e7db7. 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/QZTB42410414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa4f68aba3fafd692213449299713f22f55126c2c3dd80a4c9e1051186888a8. 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/QM6P42465603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f5e12d2d48ef36c1861120c40bf859cd854f9af5d9bf953cd1fc816628cd3a. 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/QZNWW2358112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5835524cf3680be7ebf6ad61d4de26cce753e2dc3f90d51823b66643ba91d39. 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/QZDA52398275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4610413bdc13ef40b8107d536a87f055640f0f0445484244d4e7be680f7e083f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUGBT2203573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df52deeda791296fd5573c4269bef609cc514a11b2854c28d3ef2a014df693. 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/AUWA02000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27036296e47d689fe75d605727790432a90d52994dcace53fc03c4905f8e22ea. 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/FR10S1940373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcf604a371a80bc6917282487a5b27f2bd8de7160910236d80cd0b9957df024. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/AUBEC2232382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e32c5289bba171cbb1b002f95b21db82b4dc52c719d403ff8181bb87258a93. 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/AUBEC2231826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c598e588c2002898959793d460adc297990804f890aa95bf2a62ecca4351c08. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P42025302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41ebb41b11c1b2f4599e7da473475970c0fd7bc817700b188b454132f9beb3d. 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/QZES92226202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01b3370aa3bfa87525f0eabc63cf2e45169cb9b4c993f7f77ded5b590f62a9. 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/AUNGV1700486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c5d833ae2770e3555e1f6a4a543362d2d37f3a127b18bac8a50a82a2cbb165. 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/AUNGV1700497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec72bbcce7e3f81788fc3512683f56748f1e91d4bde1189b5841c6b1fbcf281. 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/AUNGV1700498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6459b46b415b331e504dbad818cde153e9cf80458bf7370406b0b5cfd157cccd. 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/AUNGV1700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74221fcee93269c05df176df5a7fd5bf6489040cfc5b3c5e1422675824fd6418. 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/AUNGV1700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bb41551515d852187bcceff8da8c6fa8ecef07157718ba7033e1fa4842bae8. 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/AUNGV1700597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67c76cd1631b10ffbfe6a204f54e5f2535423217ccd6fdc3ab033f233c9ccf8. 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/AUNGV1700604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc14040895572eb90a4d1cdb6eac7b42dbaeb316926377108ee19181de1684. 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/AUNGV1700606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdbbfbae407fe2e177120bb4dffc20843262597a174f986fbb2e6d55143a81e. 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/AUNGV1700607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cebe90a52cf1187ffd89f5fd17dcd959959bc81824b5fe36904e6e582683d9d. 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/AUNGV1700608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9f0d3e1c07aa19e95ee69aec4ca192b69b2516e6834a088a5b86dc25762d1. 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/AUNGV1700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b64aa5a4578e4a7662cba55ff2d45e0b58575a27cee017cd094e245b9be693. 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/AUNGV1700613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e2d5234d8be240f50c07c4f1fb1fb01522333dd5427ad44e7619a581e319d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/AUNGV1700616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33eeec04468a4b94f925f0a563ab314e671a8c32296f9fed31a786e65ec2545. 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/QZMEN2374376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cbf2c6e02728724757a26301068646bb2f1334c8a9cdbed97e3ebc2a679563. 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/QZPLR2476663.