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 0xdfe89f5e84ccb101a8c9216967699b730b5fed3bbfac9315336f3991adb419e0. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab3c98d5-c053-4035-a18c-4fda44da4f24.json and https://artists.proofprofile.net/proofs/artist/ab3c98d5-c053-4035-a18c-4fda44da4f24.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 0xbd6297faf6150f3266cc10b9c914143ee3ba09c8fb7297a7a2f0ef2de9f42204. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CAQOI2520322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c89e5e8c02ad43de3bbe439b15904201bcf37fa401ad81738a0a2230e6ef31. 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/QZZ792566170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bae6a2686e73e6b4a8209d008f22af895da03dee96f4c287580a431bdef6e9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAQOI2524734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d97da482c2b15c97d85f0e965b6979e687b54f06495d3507cabf9203e1f19e6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDFP2177334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe507a717948f911b3f68e344c21b8417390e7a25904942b8f568dddcf3f3cacc. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USA2P2543943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13afcb10fc65777440e407dd58fedbd27e7ef3806b61bb178c10ec6cb516d32c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:13Z), 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/USA2P2543944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720612c15a1352bd0c3314e63fd43a85fd4acd97cb1878299fa0756213e6a231. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2P2543945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79e3dcc865bfd5c4517ae6139c9caa2f85b02b5f7af0d44b3c78c0cbf28f11. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:47Z), 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/EEHM52527088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318c8c87fcd86f4bfeb12fff57afed5c587087bc871d3dc28832730ea01f5e77. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USA2P2552450.