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 0xd52d69f666df0935cfbbf06439c2a10d990b078d70b1c36a5ae4a89ef8c57ff2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60392431-377f-4c5f-9803-a3ff5448c91e.json and https://artists.proofprofile.net/proofs/artist/60392431-377f-4c5f-9803-a3ff5448c91e.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 0xf1c05fb05e4ac2d7577f07f191afd26bf92cf12341f333ffe27d5d833791942e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPZ922402310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03da20ba978eff6a5111aecfd39e3eaee7a37485fe29e01d991ea8462aaf892. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPZ922402311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8a24c1cda104e41c0efc8c05302447d2ef87e226ff7faec0649431158f696. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPZ922402312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68b6901e4e9d81cdd3726e23a4c4787c8c88168321d4933d0af5f1ca79a7cc. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/JPZ922402313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90d463a50ccc1631aad9d51d27e5b724447816577526aa1eb8fb8b98cfc534b. 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/JPZ922406273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c66ded6b98dccb88a8bd9a437e19fc6a47a9438d828a2c03e75f2c35053865. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPZ922406274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a86ff5a0d786eb28ac8c0dca5d4a51cb67776b13e08d4c61c5c9c2fac5fb7f. 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/JPZ922406275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2c7c474c4939920e610d4eaf4db0a8f86c183fe067d82b721bcadc663924ba. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPZ922406276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9e971c6455faeddb751dc7d01660944e3f0ebf69caf74496eb4503038c595. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPZ922500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6b16b664650d8d1036233222cd231a7125081455bbe18c7c28c2606e1ff3d4. 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/JPZ922500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5734c0c232496fa80c0df55e9444cd930c9f054478ae52db87d626d2564eeec. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPZ922500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdababa94b4b9be487e7db75c8943650c030d59b199b33ecd74f4cc49d56de6e3. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/JPZ922500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0944de3152b3187933a5f93ce0c69c8e5776c9f5b2e3489c3fc8491d935b90f6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/JPZ922503383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d85bad7de7083b3603787a62cca7ea721c620a788beee323b65316d3551795. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/JPZ922506901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faee65a634053fa4961c31b57985dfef32e03afb0d0a58e0d64abb545a264bc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPZ922506902.