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 0x9bb513be203b458b2a4ffac476a4715246a9ece836b42ec73ef7619156bafa69. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/373fffda-0810-4bc4-bb9c-307a25c7013d.json and https://artists.proofprofile.net/proofs/artist/373fffda-0810-4bc4-bb9c-307a25c7013d.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 0xe5e07224c0f6ffb8b1aaae645763bcfe320cbeb9d7d4a734e1858c3265cbbcd5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX872071449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381fa480a81dfe6dbf562efe6a70e021ea053cc1fef53f8972c8849b356b076a. 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/DGA052005199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bebadbab52cc8b384cd8504c66b38eb5d1f5445b3bf5f11da51e9b2b9f2b827. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX452139923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62167c5323cbdf0b4c4da490e8f81726290da2115f7e838e934811441fe34e6a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRS182148777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e4955f80cd9e5d586fae247fd597831f2c3aa3bdffea7fd6f203c1bb7c60e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2325986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eb875321b5c270758a293a290c02e4f4216996bbd923f556e954477d546875. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX762385334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d66a05f41bf9c3ae7f05afc539546ccdc85b404bdb4c3ef2fa213103b494a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202468316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca266d0310c2e6dde788018c983a503e02ae141985e5d9cfb35007bc3ce06d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202468315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563d14a3318f6216e2ac0edbf8f70273d3bb264b0aaa851d403cac30294bafa5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX202468314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0792ca067362a804cd43aa525b44c386e37b9bbb1aa85870c3e3fa67713a5b95. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/FRX202466900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2475371128d551b6a09e82aeb867b7df9a68b3bf4e9049d55a61c58e96d8b33e. 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/FRX202466899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb62fde6eb76332534f3c25a9fe45cebd9bd04816c0a59748182f55b45a61fca. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FRX202466898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b6652eee3fb929f9641f5aea5fd53f448669434fb97051864bb1117ff14a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202466897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a9627368e1ca4ef0e8399fc70c29f1351312198f821414834a3724f7d257c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/FRX202466896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772c6a964a18119db37ecb519a8ac4435b7e4945143aba4ad710a4d6c2b249f9. 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/FRX202485652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684135c30b03dcd9e0c2ccdf400f47ddc3a64d48a5fe13f0c1f777291bc5b69. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX202485651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b535b148bccf00a1413a030cf4ee08699419cd18ab4ee219cd695b21f4384e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202485650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500c7726b1bc8b6e88841cbef709e6fdc0f72bdc55855c0781a3743ec78a33cd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX202489238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd87704b9eecc60163d4359e58e678efb0091fef49bd12aea22ee4529647f97a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX202488977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea514d3ddf19a5e85c5fb049ae91ab3abefcf79fe74fe3e945d90610e821cb1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DGA0P2478226.