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 0xf0c10e39696fce5b063d8a3f17abd0514eb02faa4c69c0d8d24b269ca126c809. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdbcba04-3442-4fa8-af45-69877cf81d0c.json and https://artists.proofprofile.net/proofs/artist/cdbcba04-3442-4fa8-af45-69877cf81d0c.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 0x9ac71e713d7ae86d8c6fc7ce7c414189c8fd9af3a1d819b6668e7df7d1644321. 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/QZHNA2181409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bb884594bcaafb29d40bd82040dcb5bd3124463d7a22ed481547f966fd8f5a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ62137638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb5baf2204379f21d9be882f684aea75b4afe09b241b8a954af58556bd14844. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:59Z), 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/QZFZ62175070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6e1957f3250a7c9f5e0380261ed33eae8f99ffc3d16cb43bc5ffb4b964f222. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6K2166112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4655b22db64a9dbdbf4281ce9f61b6677a1481e186d66a176e045658803ca44d. 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/QZHN42276289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe155c57249c4eea53a05df42c190f89a29aab5565ae2fe8530a2248311a269a9. 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/QZNWQ2203329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380eef8ce49629599d6d56a350a3d932671cd8c579443d7654c8e63523757bd1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:56Z), 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/QZHN92363588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5169b02bcf69cb5befa404e2de7eafb08b96606bd96f55e31819622392c615f. 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/QZTAZ2388265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13482d5f761a8cf6f69d59959ad27adf62a27582532e42289bba07f7db2e54f9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6F2465221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8191ce8cc06c9e075c48895e454c0215c9a77737c14a2e54af5104352382bd80. 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/QZZ7X2464677.