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 0x4b7b050fecf0c66620f49db37213c8a1dbfb7fb3e0b3b390e23a36f452d10671. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9064c04c-fa31-4cba-928d-67e96460d3d1.json and https://artists.proofprofile.net/proofs/artist/9064c04c-fa31-4cba-928d-67e96460d3d1.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 0x8dbe415f6a73c092652fbde156655db33f67cfc5781941ac0d417fa707bfbba7. 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/QZK6J2499451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a48c2c687833741a59b544a61be7182778c94ba4fc995e1077733948a5330. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6J2499452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1001c699c5b9a2bdd2cee2fc78f5cbce4e7f1dbc75930ab3a849ac3fc8506b24. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:47:36Z), 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/QZK6J2499455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74015df9ff61f6a633d969a09cbfc9a664699f06cb692e1581048e4bcdd9ded4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6J2499462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49369bbb3027eaf52dcd7ef4fdda75e6d01af8c8f69cc1246f6759498b8d72ce. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6H2429369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a61617ac4fcda1284cb61d0f5fd7316ca1ff8d5390273b077838fdabc8b36. 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/QZK6H2429371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496a70b2b6a31727f0e7013cda208023d8e00fe7adb5ba562922e54080f3f439. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:59Z), 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/QZK6H2429373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6a67a90327e20073a0e243fec4504f437c449adc6953605741ec59d2359006. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6H2429377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62421138f2597c23fc2ea85accbf7935125cd377ddfdebe0ae25a71c0027fecb. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:31Z), 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/QZK6J2435109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1841a04aeb5fe3fa26b9662c83f529bf4cd80119d03c97793c9c04d04d45fc60. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:02:50Z), 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/QZWFS2568687.