Essa or ESSA may refer to: Places Essa, Ontario, Canada Saltash (Cornish: Essa), a town and civil parish in Cornwall, England, UK Essa Academy, Bolton, England, UK Stockholm Arlanda Airport (ICAO
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 0x3624141fa3cd0379a9cb1bdee1cc8f6c5106c39a9c66adda379c1c4c4326a8a6. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acffbd1e-bd09-4a47-9450-6fd39e4765b0.json and https://artists.proofprofile.net/proofs/artist/acffbd1e-bd09-4a47-9450-6fd39e4765b0.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 0xe6e842cef24c662047dad2c608f79c19111edd339fce534a2d7e8eee040a6eca. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBMCZ0601916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422a287d0c18fb8a86972c035a3fe437cb707f3dff4a47352eaea751e4b90741. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBMCZ0601904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91da27fbf66ad04594768d28973af2bbd8730c7e11c99b9e4b09d65186d443cb. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBMCZ0601949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33415c55781384a60826fee7309c857ff97fb7d1d6c87c798723d36a87ad39f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMCZ0601978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890f364f04f8046eb184a187aaefea92c1eab6868fd521fcd66969fe748f4f0c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBMCZ0601951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5006e03771f191827443c2a8c384933ad2a307ddd0a619756fdf4dba76ef3388. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/GBMCZ0601977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f466f2ce768c1c5085c708cac9778c669cf3ae792d798ab63eb7af71034ff3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMCZ0601979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91da27fbf66ad04594768d28973af2bbd8730c7e11c99b9e4b09d65186d443cb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBMCZ0601949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49175198157118585da46f5f41131f974e77c690def1f6d8550c4e331b164838. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBMCZ0601980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29d4f50584902d3d3f70a1c2738a52972dbeb2d9eb66734a13e76161ca5627. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBMCZ0601981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adc08c7dc27d5bfec446acd1906a4d57603ce547dbc8fd3f7190a3b6dddbd24. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBMCZ0601982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0df595491e8329537aa6ccd243f71c4b3e4f98924585fe16ad6dd7cc543609. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMCZ0601983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a8fc83e11f5c58d01a92b16bbee4d0c6ccb0ddff1d63239b5375156e146e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMCZ0601984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13836efcf07802b165c5aaf08cf09236400efb67755cdb48bae52580a355a68a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMCZ0601985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1b1745ec3457035ecee90b902e8487f29da5b451efcfb010fa2fd890a2862. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBMCZ0601986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a20342c01a89db2eea5a21364d586a0ddafa0a8da68eacbaec860840170a7d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBMCZ0601987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f5846f2bbff4743b79b40ccada3e7c4ecf1100b0dc23a3709d1629e88eddf4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKHF72300021.