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 0x84090ba4e45f54818eb5b39d66a344bbc65f4b83d4e6dc534e28d17787cf89b3. 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/ec88e76d-ac1d-4312-b19f-4a6c3daff7b9.json and https://artists.proofprofile.net/proofs/artist/ec88e76d-ac1d-4312-b19f-4a6c3daff7b9.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 0x5b1fa53413daa7fb4dbbd1e6f5b97cf96ce487931782e4a173e698fa4bf0a3a2. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHNA2244811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1595b90afadbaf814765d3b842cd530bdc5e94b9dfcf45cc9186bdffc5887f0e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNA2244812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c75258dd1299c732fad3d269461b27ec270c2789d25f05947da6c0f78d7553. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNA2244815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e17e57e1916c4e513724213405cd50b7945ad66aa708aa43ab28ba48cd460cc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:41Z), 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/QZHNA2244817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bcbc1689c9bcec3909d144c491835de1c7e42cc098b7bd90e00ed851a6fce0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHNA2244818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be47995fa0d4c6c1af94f3c0f1b765b7533eac4799c8b547444c8c25f024d4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6Q2276593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c75258dd1299c732fad3d269461b27ec270c2789d25f05947da6c0f78d7553. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHNA2244815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bcbc1689c9bcec3909d144c491835de1c7e42cc098b7bd90e00ed851a6fce0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHNA2244818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be47995fa0d4c6c1af94f3c0f1b765b7533eac4799c8b547444c8c25f024d4. 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/QZK6Q2276593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8909ef76a943d3e460ca123a97fd66b35d1d4a15af0cf5fe5e1a7d6c648b96a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/KEUM72500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625379e388bdc1c7b7716dc6c7faa3ee03b1206c307a4e620a01c5a1b1e2d1ad. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/KEUM72500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d30b7946700db6ae2d32ee21042940471f8b731d36ce64520ddbbdac7cf02. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:34Z), 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/KEUM72500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cea152f94890efa824866582745020a43f2e92ca1cd009547a2a5ca5160743. 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/KEUM72500062.