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 0x6cbab4fcc649f0cfe8e82691e3b8ad8cc9cf3db2e95eafd5afae4dcadff0729f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e6ca425-7282-426c-b798-4a92b89682f0.json and https://artists.proofprofile.net/proofs/artist/7e6ca425-7282-426c-b798-4a92b89682f0.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 0xf73d6d4e7349f6b0094da4e5a2e61c925856f625d17ca7c7a919006d104f4e5e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR96X1943589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8bec37d6660a004890885f1f2ac60a4168aeb20cee576c4db4b35de2183202. 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/FR96X1943590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5fac55fd0a29b00da8e8e0874984dc05d5bf92655f54450a08303b19c748e7. 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/FR96X1943591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232a944548fa8f9b383aacae4e97096cf4b63fa098e9e0a286b66783ffb1ab3. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/FR96X1943593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986d2bb1caffc4cde3f412784e40e323254ab5a92552978aaa294a6c2896985b. 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/FR96X1943594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2bbaf91ee130cea6fb77b1e5ef11c7175fbf37b7274c35b6845be25b5313c4. 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/FR10S2054122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8eb48abe42d4191099ead3191c8284593ce36925feaf116defe1747144c148. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X42046211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4266ae2819de70ae206c25290ebb066c7807fabaa128019e5a43c31d54bcb0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX762100835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b4313bd5cd7ef48550fd41ebfa3599c98e39ff50a475457ebbce21f7aa8544. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX762147621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d6e4596cf3c45a744122b538a6b2cf25115c8f2e83f5f3fbe46e688a4b0a5f. 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/TCAFZ2128843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a4250a3f72faedf486ac2f11a0c0b3714dcf5c3d9ee2b46932e64d6fa99a74. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR96X2277723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419101d647916ab46498894fbf1edfd78bf67fb01ecb7f6a7f5adeb3a17d3d0f. 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/FRX762335751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083fac18a15dac312fadb8ba0f4e0daff92ab354491ede3748390bc5e5e861eb. 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/FR59R2514691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6184ffb6fe2ae3d997f5f3076f30576c7d70f1746eb05d8e6d68acb4cee42. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR59R2541922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5033761a9cacca12df6bc32e52eff2bdc0c9851fd557013890a4f338c68950. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R2523378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21beb1318a78730ed5ba6048449170a62f395c59fc40230b4b3c7fa8f854c4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX452567806.