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 0x6a3fe8add44f9d462ff8a89c70285e3dbb75ac8b35cdf53ac9b8e8f01e30b763. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7730628-a3e7-4ba3-8b87-3260b51b4ba2.json and https://artists.proofprofile.net/proofs/artist/e7730628-a3e7-4ba3-8b87-3260b51b4ba2.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 0x16799e5677716ea82b1ea694a73411c38c0e538da342b4ec0026f62a40cd8463. 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/FR2X41712775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbf48a8f38bca7be2f141d8c89de1afc5519c1720138f6c0553cdd61aac9aab. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FR2X41712776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302782c75a6bc825095dde2692d9c25c4b1d5b24d1792fca7373f046c3c673e7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR2X41712777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242729be863cf469380ba5a3ed596471f5693ff36fe61f4b588189f5ef353dce. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR59R1797981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bece74d3ea6404f7565d7468f6e95d070c1babb48c08c3b8e4c7437e14a5ed. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FR59R1797982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6b165667abe2f1fb7b4b5a80424f84246907a6c6e0b5cef590f7d7ae09eb7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR59R1797983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fb16b1cda682b70d507be5a26301c0e88ee2ea0c07f8902b535ffb826e9622. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR59R1797984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fe2dfe9452357ded0d6ca0943d684307e85453b40490747035d5ee01f1de08. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/FR59R1797985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1d76697aeb05eaf3e635acd7cc3005fe434ecd0b20fba0b5e405337252e5d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEAR41945935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b00a56b72b8e45e164f2e6aa7f550e692c034e390373d021ebd42a033179e1c. 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/DEAR41914106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814af8d4dc405a7077974517c5f0c5dc78e1f7966a1599bd32de9bd79653d79c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEAR41961573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4f02fb99e3ce28cb608b99a076e75ba15446ebf65e94ce47b9e7d8a51797f9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEAR41942385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29349fa5c0e9cc94e1ce6af4e14f5ffab68c0e881f423ed257918719367ba115. 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/DEAR41966772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bedc76157cca172a0e42c8bdfd091f774d54dc8c7859a5379eadaeecd057f2. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DE1JN2441613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b87b17f2f97f2e058eae0308a9de432f6c7bd633324d5e4b6d4f770395fc2d1. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DE1JN2441804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb5e2c72e8cef102f550f9cf815474ea51beb2b9b7970dd91e32fe0b2a9b06. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBLPF2400760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c211aa1b01a984eccafb17032ac7acb01a58e2ec81e912b4bd8c1fe5b18b253. 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/GBLPF2400762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba704a334e9c94da156755e952c75a31c3eb5cbb7c27948f65ad232061d882. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBLPF2400764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b2172ce70e1ee14ecbefb5dd5d60c0687fdaac6ff289c0af7c46fcefc68a39. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBLPF2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d7c5bfccc909d8cba1b42537c6140fc5a01cc57aa5844b2aeb2c27e0875b27. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLPF2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a1c3114282440ddfa193d340c9b4e436c518b48efd7c8cee502bd29564071f. 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/GBLPF2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f73ccec3e71d38189d6e5abc9c1b41affde2c96870d3f2571058512195af2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF2500023.