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 0xe1ffc976fe44a300b6e912129eaef9fbed397abcd11755f5cf9c8918ab313a20. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4deca1b4-2e9e-48bb-bea4-624624baac28.json and https://artists.proofprofile.net/proofs/artist/4deca1b4-2e9e-48bb-bea4-624624baac28.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 0x2adc1d7bd282cf196f7722b7bc8a8d42f4775323f35302ac911b3d53f5f471ba. 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/QZES82199682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93035f962a8a08ecd7149242f49b8218361db50171b957c9fec2cb58ec81948. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCADK1774504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b07f0bb44e1a9e735099578ba4dfa67555ae1a9adea675493c1d7eda34ba43. 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/TCADK1774506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc141c238ca7d4bfad41bddb16cad60782dd5712400e1486eedfec111c3cb6d9c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADK1774532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6445424e2074293a524ae97e402b36b812c24411b958c8385265a1b6e13ac95. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCADU1805832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df92c70f45f2525f3017b447bd72930bdd0c28fc7833d63b8e101cf24ddfc4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCADU1805856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4949c9742851c869f0cdc0f67c3e4fa9aad8c48009e231f2bea42cd7379bd00f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6N1997714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46990cbea45b14527fb3c56962d71693f54f81a48ee822ef032f99a73d49f60. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6N1997719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2004d06e30cc3efc5b0c00b1174eb4df9e679bc992c3690b78d4a2b4507f25e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6N1997720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc512251eff165a0853f600f4059f11e1aff7871b3fec06870f5e4ef85a5ce4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6N1997721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d99bad1fdb4ecb936e7d0ca1eb541f3ef7ea212003435e1765bbc00df82cb4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZMER2032562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee7bf6f8cc63afc2175eb904b39a7d92cf0d23584db6a379915d01ce135ba6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN62063504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb266e5b6ee215a5c56698a26b20d56c4ea89f02633519b1bb6b3878878b454. 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/QZMEN2159598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343fb354405b553d0b0dade8e7c5cfc39da2db7c2478b3c8ec083e8dfbb9556f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2159599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc1674b398efa0feaad1bf91220c2a484929790bcf54d54ef422f0d1a27612. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:07Z), 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/QZMEN2159601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28199b2e5049afe63e0ca2f8f1c5b5ad232bc8e5875e6823ca4d87e0c179c1f. 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/QZNWU2269356.