E17 or E-17 may refer to: Queen's Indian Defence, Encyclopaedia of Chess Openings code European route E17, a road through Belgium and eastern France East 17, a British pop group, also known as E17
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 0xf47210f36b20006da91b9861bc8aa25300c99d644035f4aa4d6c62f07ba2f00e. 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/29e9addc-386b-4fa4-8e9c-8f26c825a3ab.json and https://artists.proofprofile.net/proofs/artist/29e9addc-386b-4fa4-8e9c-8f26c825a3ab.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 0x5e4f6ed80f4df2db4feae421a088fd44d9398c481fd9f47bf3fe3cbfb9c04555. 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/TCAHK2321227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f6ed80f4df2db4feae421a088fd44d9398c481fd9f47bf3fe3cbfb9c04555. 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/TCAHK2321227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c59c4752a139439ce5760f8d80570b6df1be727a2579831f54ddac5b8b45d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHC2395190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b50798c6efefe4bcfd3356a5fcf5d68b204e903c378157042c8d770bb2776e2. 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/TCAHM2349105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc338031e5fdcecfa8e3f5571e0641b25bab0e6bf310de4cf23dbca7e4ef7c650. 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/TCAHM2349118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0e3f275ea288c7dc83380c6c1018a2d07df460a0c7336de797d5ba30b02987. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHM2349122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f72abd4c8f0eb3cd1bcee29b1f28c7a05327ac3a4b25395391426d91f377d7. 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/TCAHM2349136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aafebf0143da0b19f7cf2d000b84d398543b435704481692fd02a39a6fad2b7. 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/TCAHM2349148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b7aaca4039f1eacbae6c859be1865ebc2ce0f4c41736550f5fecc27e64c67. 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/TCAHM2349150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8fbac116f2a79f17835eb704a79cdfafcae43947ba750d0c9540868b808c60. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCAHM2349156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ea58f59b3c9828a3200b698e09a83069e42bfaaab47ece56c5646d1e283efe. 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/TCAHM2349160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea06989f63d8202ea69ae350f93ecdcc1f939d9ab8a41dea886f8e4ab5d305. 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/TCAHM2349177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f56b5fab21eb8a807a24be5c671c32bc31703e6e4882f50c5e3537689146d04. 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/TCAHM2349182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac33907991b272060e0bee790a59f23846199d2a1468e9e85ff2e909bee38ed. 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/TCAHM2349188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d15d32737c166ac624acdd35130c7baac1e431247eef83f905bf62949f48437. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TCAHM2349191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d664edb2c7cafb7358e2282f2d0efd18b78f2c92d6912f276496c499eb7a312. 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/TCAHM2349194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d34d425a31cc71341068f9a338dbc1967dd9a52bc0205cf1f289fd33482134. 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/TCAHM2349204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6d21c0e8cf47225db085fc0edddb5c0071e444533f150e60678a2caac6f82d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHM2349208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38431e1c162b493bd845486a728a77115a1e706ba9542e273577d7e2bd525b2e. 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/TCAHM2349219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea70ab79729fb78a8fbb8b46a4b672c23612db84af24b20803750178f80c8c. 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/TCAHM2349229.