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 0x2fabcf4c86d4a06fde0708d524a8dbe51f2cf0eed734dd47eed093ee235908fa. 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/947cfe7b-6ad6-4a7c-8460-2d04503fdacc.json and https://artists.proofprofile.net/proofs/artist/947cfe7b-6ad6-4a7c-8460-2d04503fdacc.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 0xd5712571ebd6c0663f6aaf3692ef8543238cb56dab28f663465e28564c926ae4. 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/QM42K1611667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fac6b09c6ab4fa6dc5c1a79614d9ddc89d35295d45c961c5350e10dd9c6011. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QM4DW1701736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3a463b2de45ced7ed136afe7209d6464830b13193253aa151d18a8258f8b2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4DW1701738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413cf9e1f4582fd64c7621116f512ba4c4664ca878f70545cb197f7c944698c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZBRF1891817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6fc047a79ff34fac9f35e65ff1a3d80a2c3114387afd3c0a110f6b8fddf80. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA51824074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bfdd426b908f9bf39a8a486231310b5f69c8748cc3e2720894d6bd8c48d894. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM24S1839846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22b91e1d83e999251ea879458497629fcbd383332e585457af5e0f9eba679db. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM24S1839847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92864eb976b1fbeb7896d4d4ad7eecebce85a557ee38de39653935fb9f01d517. 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/QM24S1839848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ef2fbde8660ddff1b3a56c526a76784641ca1872f0acdfac33d97855f2b5c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM24S1839849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3096511a17605ce566255f157fe08ef33fa185706a7644fb6e3b1a81bede9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN31954878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ede92199d44cbf1040ee7a7253b272039427e1228873d098ccc3fc3a2eaff4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM24S1924313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5fbb451d51a5edb1a29d214e446d8de0d1f2d2780d6dec2efe30ad736c3764. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USUM71919822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86095a122e640d288465ca6ff7c58cd0fcc6181ef9d8c737444d5bbf80c7003a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52182587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b927b5ebbc2ac483930ef26ab20b96223529f2aa86aae933cc2c937ef9896f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDXS2302230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7430bdda487b81a0307f85d934f62a97e648ebbf53efe50a7b85611609e960. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDXS2303123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79f714014848c12d2022318b59f87bd9099af2fcaf25a8e48e438024dbf6f8b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDXS2303571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd289b78993bfe0d998d9ddef5c18f7d65ed1cbbe0e1917ee52dc057400b84712. 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/USDXS2303573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc75aa9a692312145d1a1e0c330a130a277f95315868374fa6e55da6c4ccd0f. 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/USDXS2300295.