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 0x11382d89a9ed6ca642ebfe3257b5b0e028a9b183d193489bbc2b5fae24775668. 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/7d7efd9a-2834-481f-80f6-23d92686b79e.json and https://artists.proofprofile.net/proofs/artist/7d7efd9a-2834-481f-80f6-23d92686b79e.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 0x5f82fc163a5e6e21a1b7e7d805926da66145410d893e28234711cd7a33887fb3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAS2140264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b0c4132aa785cf3c126e1725756705f32bfd1a4847a980e025bfd1a13286fb. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:12Z), 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/QZES92242556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35330a2fd5de02076c1195602c0a70d3919e72c51364b22760537183d6fd671b. 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/QZNWQ2272715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25169c87e48a2680508d07b94abf8b88508a1f199597377e4c249fd4b60d8c9e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTAW2285101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2f87d9c042b1c10f12c4b10979d91399f5e58813a10a7a44e1715326fb140. 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/QZFZ62370948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214b48deb675d79796478de53c521fbd46d31664793d94a7ba2eddd221a8259. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES72318177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f135126e5b7afaac3ac3dd0aef2971d532127944c9581b9743b123c31f66ec. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:32Z), 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/QZHN52328369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c19372268ff7ce61b779fb6e5be972658846d24297381b2713dc6970638fc02. 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/QZHNB2318134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0039c67d035dc660a34e96e67e4880e2d6190c73b2c3e4c4ae3485ac40d0fee5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:16Z), 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/QZK6M2350317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993606bb6db4f2e50c9a0d3a9d617373ffd34900c345c0cee721227d95f2e69f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:49Z), 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/QZMEM2372056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf3c160ced39d2e98f66c47445f1bba6453033fa35ae8ace57a01767f83d602. 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/QZK6K2411865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e69357de64dba53f44545ae388c87fe605a4a7dd42348a37c813cc34d7c0566. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYZ2578884.