Hydra generally refers to: Lernaean Hydra, a many-headed serpent in Greek mythology Hydra (genus), a genus of simple freshwater animals belonging to the phylum Cnidaria Hydra or The Hydra may also
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 0x78440bcb8bf8e86e69e2fb4136bc08a3ca20cb6b29b54e6c4d6708fcce8b836c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/891bf197-5944-4741-9b84-bbd8b7415f02.json and https://artists.proofprofile.net/proofs/artist/891bf197-5944-4741-9b84-bbd8b7415f02.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 0x54728b822ea5c2110684a48461ed31539570b9662200260def94c7311b9e1107. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITFHF2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3822b3a92afb22b7f745a356ad7c6fac02bc415d4f50229c1ca81422e6c7d9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITFHF2400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755118d9294c624a583bbe6cc556a7172a82700208a879a3dd4e898272b3a20e. 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/ITFHF2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3137ce9cb6177e3dc6bf3d545ec33e61963a9978b24d0915aed775e36f026f4e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITFHF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37660c1c8d83572f3f739c0987cf187b4e8a25e19d54a3225f22983e3151d689. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITFHF2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3137ce9cb6177e3dc6bf3d545ec33e61963a9978b24d0915aed775e36f026f4e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITFHF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3822b3a92afb22b7f745a356ad7c6fac02bc415d4f50229c1ca81422e6c7d9a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITFHF2400195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261f2de137546b5b72a6c045dc830fd1c7b81e2b2a076063c6fe1813e7a229b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ITFHF2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fcffbb35e12fc2ee9ade6aafd52da22f74e04b88c7a3495fbc3ce99ea23909. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ITFHF2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975668e133fc22166bd8448a4eda57a2dce936414f2b4656daab2e3ee011de0. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/ITFHF2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54728b822ea5c2110684a48461ed31539570b9662200260def94c7311b9e1107. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ITFHF2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755118d9294c624a583bbe6cc556a7172a82700208a879a3dd4e898272b3a20e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITFHF2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879be5d2e1425ec5a8a4ecc4c46bf951985653ef98ac0bbefb1e1f703ce2ba0e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITFHF2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f741c6d864fa4a9fd89e7a89543aabc751443fba56a817a72da1eb9c84746d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITFHF2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cb064eac74bae5cde503b14f0ce385d962202196a4495cba49d9cea50d4575. 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/QZHN41957733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd3da9c72ee0e68e0534f04aba66696a152d79bc3296295b79534b72b12fd6b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITK192000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67ec42019c440f53da5be8572d688facba53791c05047369330d86d5c7e76bc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITK192200147.
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 0x8cb46586e87542116b6da19033454b41c749c5e0274c999da062561a073ae009. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ITK192200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79310491e50daedef7b46b4ded77d28814185b1aefc79eb5897d55aa30ec7cfb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITK192200157.