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 0x76d8ec5a7d5d236ee4ce73f757ffe537cdc63a9c2955b7cffb182a30e536a61d. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6def85fd-7094-4c26-8117-39252dbaa6b1.json and https://artists.proofprofile.net/proofs/artist/6def85fd-7094-4c26-8117-39252dbaa6b1.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 0x21268bb0ab8a72eaf8aa91bce61cfc215d75ff22464fc16dc6f4b5b504db0a06. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZHN31998831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe530d0b7be3842c5c43e7ae025ee2b35c956260b9e9b069ce0d4d71cdfa7ac96. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN31998833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f980b6517c9694b94dfec0982879615bdacf11fe29e14244d725bd4a4107e78. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBKQU2248314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b429b4897c3c2a1153f54d279db92d5fc96000dd3f6afcd64f31fd08c56564. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/GBKQU2290836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a2757ed35b2d3df8a341421d357cfdec67fb9c8b9e04b308bcf76fc2a61a02. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2334424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d0298ce75add607c17a64a7bd63d990722c0509813b87154ce5034d59511c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2345085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebccf323855faef140395ad11923198c9033e0a6e67c66742313e181951110cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2354249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b57f571066fc48be4167811c1c647fc3516c0081ee1b726f2839c5a71168d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2341161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739e125d4efeed1962452c9377da1fdc49db2342b41d4e248dcc493f3b0dd2d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2363179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d0298ce75add607c17a64a7bd63d990722c0509813b87154ce5034d59511c6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBKQU2345085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97c52047a292775ca3b907523c7d28392e58601002923aa4de204c1ff5a28a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2349232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3cde5882142f6e62b27e547ddca36ccd6493811f7e65cfa0edb6a2ac223bd7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2366566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a2757ed35b2d3df8a341421d357cfdec67fb9c8b9e04b308bcf76fc2a61a02. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2334424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b429b4897c3c2a1153f54d279db92d5fc96000dd3f6afcd64f31fd08c56564. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2290836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b429b4897c3c2a1153f54d279db92d5fc96000dd3f6afcd64f31fd08c56564. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2290836.