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 0xf8ee6cf59aae57e2acae895c914386b8b2cc6dd778e460964377f5d6301181e0. 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/0dab1cb1-0ec6-4304-9246-e19b68a60c92.json and https://artists.proofprofile.net/proofs/artist/0dab1cb1-0ec6-4304-9246-e19b68a60c92.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 0xd9aea77a58f108d68e40c37528da79117614f3c526fe1587ac520a983773ec26. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZA5732300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd469b09c4ad9f7f7ac5ff0c7049c9b28a3c5e9d2f346afdb7142a881cd8403ee. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZA5732400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87074d8e8ffd7c91aae0ac2e41e195a88788d0813950ae4b334376d40b11062d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA5732400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab78cb1b9b97e5c2cb61ebde2c777173570812cf876b32940efa98e29946eeb8. 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/ZA5732400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ae0c727348c76836be14fe80011d973f0e59f42b1c35be39fe3223339a3263. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA5732400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3254952cb5f471a2a3fbdccec450cccf48b860b86929bba594fe8924f9a96f. 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/ZA5732400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27913a37a56a26deb11487e424bd2b51891665c3e39a1672cc13b9e1269e8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA5732400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ae7f9ef890dbdb08f8d8df5c90007bf1d42cd0aeb452ee3cde29a104a2ab4. 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/ZA5732400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f4c59b0c9d79c39f310888da814ab1b41a7c060ea3eb31230ec7b3560ec5c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA5732400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2c7a7eb655464b3dd58c3f1475b4e0962eda30d4455d04be112cafb6cc76e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA5732400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405fdfe71961927d5c66301cb1c213575b438d88837fed69f8428d6c56d8fce. 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/ZA5732400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d3aab6b50315cbd191f4e633eeb6c33187044174abc79d049d2741c2695109. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA5732400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74d08be307099355fcb6798787c309846ea4aedf14d6a6234c2963edc87fef9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA5732400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87126784a22d5f06f1b22d3e95e44df9e402905451238e5aa3549eec3621cde. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ZA5732400030.
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 0xebe056cd465a0e50537d832fdcb0acda65a0c3aa6fbab3102c238ee03fcf23c8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZA5732400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26f45b18632a641c80233989ac8b8d541b2923fe2bce842a7286e848db16bc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAY362400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10088510d792bc538a6d21cc31956824ba8582b78eaade241fece9410bbcaffd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZA82Y2100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b542bcd498b052991a3ad85292302ebbff1b30d8dc7fced701ae1e068ed6f8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAE1N2200006.