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 0xa600add45b09657e31a6c5ed7a1bd3b890d04f2704fcc3103ea1aeb144f19435. 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/6fe5d973-5f4a-49c6-9b01-f08b406a3edd.json and https://artists.proofprofile.net/proofs/artist/6fe5d973-5f4a-49c6-9b01-f08b406a3edd.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 0x1bae6624d1c22a86d2f1cb2d5d93af0e63b7f45512f019c1ba21e38b53ef517c. 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/QZTPX2497137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93ec88ae7e2ddc8a83ac98b738c1f7592d0c168994d4b1261b11ac8d60544a. 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/QZTVM2404137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37db8fc74a65029f4485373bb1574240e535ebedda1f23c3d2ec51d89aec5406. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTPX2497273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974df80eb267748a96ce4f244beb1c0420ab9f12289d65f2c72a83ca774754f3. 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/QZTPX2497276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046de66a100222b45022de11323b76586e14fbaa2f99decdce826f2c1a5c445c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTPX2497277.
Hino 449 - O Meu Nome no Céu, Escreveste Senhor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05592e19da0916aaf937155a31cd667042d9d58c0da1fdbe4349baffb4ae98dc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTPX2497278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce5461dfcadddb38193d97e3d7451776ef29ab1586b666c56ae9a9c69e5fb85. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTVM2414821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7933a53e316033c1db3c06cde572edcbe1852232c1d36ce3cd3992b8e2a0036. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:09:29Z), 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/QZTVM2414823.