Declaration may refer to: Arts, entertainment, and media Literature Declaration (book), a self-published electronic pamphlet by Michael Hardt and Antonio Negri The Declaration (novel), a 2008 chil
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed13abcb32d7907e233715d2c7d592ea40236daee918c474ba6c2ba5a1900cb. 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/a03f934a-71fa-4747-9c7b-70df6e444431.json and https://artists.proofprofile.net/proofs/artist/a03f934a-71fa-4747-9c7b-70df6e444431.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c6eb3e6293d3b650440e5a0854962f69a43dbbf62706c38186e24884f3d438. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFYY2474761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1125edaa663e987e0b52059b35edc91fb9269e1fb5e9e4560f6cafe8d4d23cb6. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USHM20314220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa381eef44ce65a9c53fb999363183ba13108c6b087e2e407be361b50b5db9272. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMAAK1488330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed010683389d31d37a6f20f0eba133f2f3c42cfae17e0f992b0c628a5c2426f8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMAAK1488334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c69012aec35aa525673575110f4cbe008068cb16b0f0df302f84446943e123. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QMAAK1488331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789765f9c601dc9f161c648fad443353c89b497554af484903f7828a48bf4fd2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMAAK1488332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4277fe0e3e41342b638870c3f31f10c7c49e5f17d898b528d0f6baea9b4aea43. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QMAAK1488335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09af9fbc62a388f89f71d0706b944202b01ac1c0d053691419190e1f4d1f05. 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/QMAAK1488336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcde1a4c03e9e57bde1c41832f9529c5be2b0dec9d8c42b17981f46d9bf7c2a. 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/QMAAK1488337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83f42a6c50b6c84ddc11c1b1aa0107baf76d7cab5dfbe907493df3b591a70e. 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/QZWFK2458113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4a6fcf95f0beab4b2a1616750f0e35665197149ba7de29017d9234d37ac66e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QT3EZ2436687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e7b3b1610220bada522f1a66134b4235b2daf81c9fafd9711dbc211e5fdb55. 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/QZDA62562795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83f42a6c50b6c84ddc11c1b1aa0107baf76d7cab5dfbe907493df3b591a70e. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZWFK2458113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8365db1e5a59a6687a0f382e78dd54ebe546e593f53378faf092668ecd67c7e3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ762499338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c6878ae3362bd3c81e88bb73163a1068cfd44036478fb204f7884a6f9d1696. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHNB2539689.