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 0xb3c12029a801596d6cb0bf413479926458469fa39f053d85cfb2ae799b538d9c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d685e1b-f31f-4ef5-ae9f-a008af8ba6a3.json and https://artists.proofprofile.net/proofs/artist/5d685e1b-f31f-4ef5-ae9f-a008af8ba6a3.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 0x7f61cf22ea19c038e1a5678a1869e5f12df2364482240c2458504eae62406824. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDA62117295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb5d2faf9adb73ce5f1533fcb84dd575e1155162262e6a9aa943d202e444f59. 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/QZK6P2100830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f16e99fab078c25e7adad6b51c0a708a01a9b77bb92879cbe1471a2884f91. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:36Z), 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/QZK6P2142334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c04bdb8d2138db06907c0cf91084ca791d9357405fe6d1f7fdb6316e75ee73. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZK6K2165774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0345e228d8fa6dcd84b10f3cc06ea62ca6d671e31b92415f6281979d5ed5a8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZK6K2164483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0345e228d8fa6dcd84b10f3cc06ea62ca6d671e31b92415f6281979d5ed5a8. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZK6K2164483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ff8b94b748cff01f5815e7b6e911309e0a6a51e50a07fd5d80f5276a749dc. 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/QZPLR2191581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ff8b94b748cff01f5815e7b6e911309e0a6a51e50a07fd5d80f5276a749dc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2191581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dc706d07cd9e05f123edf97fe293d277f3c24ff0a72b7892865c4f6d5f94cf. 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/QZMEP2386813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f0d8e22bf42d7b06d363fb1acc44799983b1687079497d76e07c3bcc2625f8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ22435493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bde8360de5f628e7791e380819eafc163f5f3a41810682206d952abdc4f1c0. 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/QZTAU2318193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a9f2362842a112a7e7cdf16226641e753ec070cafbd22c00bfa0f43a3fd7d7. 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/QZMEM2561856.