Doomsday may refer to: Eschatology, a time period described in the eschatological writings in Abrahamic religions and in doomsday scenarios of non-Abrahamic religions. Global catastrophic risk, a h
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 0xd0ddbd150beb92e65e3fdd3acde36ba39dbd88a3197e8b964aabde6fb169c5bf. 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/2ffe55da-8982-4c84-9461-58060314b88a.json and https://artists.proofprofile.net/proofs/artist/2ffe55da-8982-4c84-9461-58060314b88a.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 0x5d192c26cfd482dd7b4d5c27a251bb4d317d5507d9d3f67d0e468763e2214769. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7819573519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34284c99bd20967d36fa57bb5f5ba65f4026bb0502ea482d13b7f062c3fa8daf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7819577610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea4258c608d1fcddd62b35f86dbe92cc8fd15507d29541cfee2a7c2fb3f472c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH7819568697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5f180413a7fcf1a81b6006e64f6bab993a6f08ec5cfadf0f9d241807cddc7f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7819577284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a4d205458250abf839bac214462360b72cd3d4a982361767443480f4b972d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7819577240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756948e4007f30b8d692620d299956f066360064ddc92930f23eb6d62e467a52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7819577308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4470205b376c806579c65408adca4bff7e45a4517214fd4ec5fc6931e8bd13. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7819577286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139d45f371fd3c1a0cec4ce01d37002be09bd6b2014327c0d5981dc83f612d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7819577287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a9b124aac91b72cb7ca4768d62cc1262bf273feeeae85213bfa8bcff9c9147. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7819577310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5f600d5abf988399233d075cfd2dba9e632188004e18974f96d64af9fe009. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7819577288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715015a77ac912aa1b58245314cb329ce91c8e875b9780c34f1078604d0e2296. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7819577289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aa4f577b19466b2c6fcc9b22d66250aefada5d20518f69c5d77d381f0bdea8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7819577290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3306e7dc5fc85c5ff6c8ede9de02d6e2c16cc9271247bcae82b3ed739f645e51. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7812532940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b5bfeff585a3bae9832dd0367aaed2bb6cb0d486ee7dc2e64faf27b651274e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CH7819548021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a216eef981766972a1a94d1b030cc8c62345a8b533b885e4064e26ff09f8a9f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:20Z), 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/CH7819577309.
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