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 0x0676487157736966ae33862453a3ea8fe0702bc4b27133a8b9589a1c6cdf859e. 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/af2e7051-a2ba-4e9f-8604-f34d636b0137.json and https://artists.proofprofile.net/proofs/artist/af2e7051-a2ba-4e9f-8604-f34d636b0137.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 0x21b1501ba02724b211c0cdf5b5608167baddf3565aa0f012393722215db99457. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IL1041000497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9248c02bfc5129eb28ebe78750b3269f100ad91d4922ef8e9bbbac3528b2cc4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:23Z), 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/IL1041000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e22b0ae1cbd2194ad567506f0c58d9d399479118e32f1ce81a124885cd2561. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:25Z), 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/IL1041000499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c34368273682e54dffee5f116562b710645b376384eb3a946d27c31efa4e6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/IL1041000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1257847f023591dba9851fe805c94869fd811bed3be928258c8d47c1ac97e089. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IL1041000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c6c9b19813fb7bd039c853174a24f753f8546cecb5f5a708035115de11811. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/IL1041000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d3a7c770f1f9d2d7f0222d4a8e8aa05c284d2b5c554d222456bb50056200b. 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/IL1041000506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40446924955aae0b02b71c34364b8d66d236ee31b374ea61a6fc69b4632abca. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/IL1041200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438631e71561ee32d30cd785b11950f183a14716856eb9d7492640d28dcc7b3. 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/IL1041200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a9973b911129cba95bb589d5a48899b5ade7bf069d80446bbc9f4aa23c8ec. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/IL1041200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afb3b74ded53c62573604e519a320ecd33a34440d289c80f52d3dddd53cec56. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IL1041200514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90db71ff0b23d7be5ecab53f9ee07f7873f6c7e25730a05d2457209a1161ffcb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/IL3601303080.