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 0xe492900cab920f020e9b0a4c8028a9491bf5ef44b8073e4a2b50c7471aec3d82. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c374c9e-87e8-4098-8274-dfaf9c49294b.json and https://artists.proofprofile.net/proofs/artist/5c374c9e-87e8-4098-8274-dfaf9c49294b.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 0xa189df52bbab145f4580a44f70fc3fd4708982c785df334b83547dfd2c4108be. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:40Z), 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/GBQLP2200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be0c862e9c75131f5a4011cec6b957e65dac2e2d8604fa61bfafd2bac0c127. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZF22000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e4c81fd4d40beda1893e351165c1da9b211db32e6b2a0db57019491067e96f. 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/DEZF22000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128a8268e02dadb5285ababb798d7a7a554fd6cbde48bea706393de2de7be11a. 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/DEZF22000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e0ad072a67c294af08afa4415b04f89654cfec737d1d105f4106a6017addc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:27:25Z), 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/DEZF22000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2625c48eaf277fad1a9503b2fa9ef1a0dd1f7a751c0bf0c00b83f36d7a34b1f5. 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/NLEF82400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2625c48eaf277fad1a9503b2fa9ef1a0dd1f7a751c0bf0c00b83f36d7a34b1f5. 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/NLEF82400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f40d77306f200954fe0fe347cf594bcfeea9309307b730fd3d6b5a0ee79248. 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/NLCK41062359.