EGR may refer to: Transportation Eagle Air (Guinea) (ICAO code), a Guinean airline Eagle Air (Sierra Leone) (ICAO code), a defunct Sierra Leonean airline East Grinstead railway station (station co
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 0x9e875e45abc78fa9c46ee1338f23d7339c6ad927830110f766f14d00fd5fc1cb. 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/0e499c57-9d04-4b6d-97db-a05b1f7d0c2f.json and https://artists.proofprofile.net/proofs/artist/0e499c57-9d04-4b6d-97db-a05b1f7d0c2f.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 0xd758024209fe6f1eca67ec0da5cf6b4be90045e89c1e0572725f8a68c2b2d193. 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/TCAHD2329959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61d1c17c34d949e1cefbcfd29ab2b6f8941dc3647891823afea3fa79d92385f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGD2231844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4b1141bbbadccc430dd30f284004f6b7b5bed407654cfefe6ada06bdd8041f. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/TCAHD2330092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36156a7611c9ee07eee58566c068eaa82be2f7c021741fb47f13e7e7fdd07445. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHD2330098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6727d99ba075dffe78991b3a77928156a87ea8600f3ef8d2d8034101752b360c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAHD2330102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6bfbe8c734a0a6b0446146765d8e108027ce98b933c063bdfa35a692dcbcd8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHD2330227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c470ef2d0798627e83ebc95dcd4d3ab10cc4ceb415393a78b64a36660e60ee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHD2330232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e8cfa9e26a6ca54a66e1bd162ea7992f3e9ec58fe0a4504139ee279da2018. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAHD2330251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4b3659cac7a8ad4d24be871fe4a48267f7d52bf5821ff5d78a97380b4cde29. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHD2334220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a82345535c6d860f4a67cf8603a524d5be179547135e7b3dcd4d4081ca7d558. 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/TCAHD2334230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf957dd4853562fa56b38a06e74e054eae69c88c3a5b03abb0a018244c1c6320c. 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/TCAHD2334234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f0ac33852ad7c750262a15189574146b76d1ad91364c8f4e0c9483add62484. 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/TCAHD2334253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19091af1a7faa328e3a212d6a32ef51cad9f8b04655c5004d43a3764cc893a21. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHL2313178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a236286b2a669753a411863ff5897f0eead8ea88a89c66dad70031ca08d99. 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/TCAHL2318642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6062ebf5fd5de5a1be5eed78aea757e077db2681663a313071499e41836fba4. 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/TCAIK2423104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb735ffcb8fbe038bd1c0ff407f7a11e94c59e62dfa22da683142deeb6aef71. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAIL2489020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d0bd9c3e88848693708359a8ca1e09351b18483ea6a8d2cc42b0551fc5d006. 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/TCAIX2424066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475ee847564899aca285f075d65899ba9bb9874f8d6fae45f1acca36be6784a4. 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/TCAIY2469550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e60909678fd4d4f2d2abdf7d3617331aabc391d3f4c50c37f6249c4e12d3d. 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/TCAIZ2469873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56e7a68ed856aa7df6ef0041efeb4a42aa1170086c9d593af87b569b64b9aa. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIY2470080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6062ebf5fd5de5a1be5eed78aea757e077db2681663a313071499e41836fba4. 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/TCAIK2423104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47463c59591c6e4752811bea5619d864ec61d3d7af7960275ddabef48d8c7b. 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/TCAJC2428269.