Buca (, ) is a municipality and district of İzmir Province, Turkey.Büyükşehir İlçe Belediyesi, Turkey Civil Administration Departments Inventory. Retrieved 12 July 2023. Its area is 178 km2, and its p
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 0x97302e1b0587945ad189f465e157f52c9f2c8de20c7ce1ab3fb94eec554d47ee. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d5058f0-f2ad-417f-b9ab-4e15b7352374.json and https://artists.proofprofile.net/proofs/artist/8d5058f0-f2ad-417f-b9ab-4e15b7352374.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 0x17a7619a6a7062718a375532b3e70d5d0db9899399b2c287f0ac5b4cc3f1620e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CH7812424814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef31a258d1f0f4e71688e9171c41963b23770e92e88fc29763cda579d382836. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812527667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4b15db1ef61acfe29dfbdb816a0464b158c0f4f372da5c35d6f762ef6e6075. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH7812530556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6625f88a0bbb3dcdcc21f828692a1929282da67770998ba9d0dfdd9b90c89bec. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH7812531792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f26ba28e4906f19f1b8260d57344f12cca1f9cd9a32a24a1df2ad210df01bb. 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/CH7812531793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a7619a6a7062718a375532b3e70d5d0db9899399b2c287f0ac5b4cc3f1620e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CH7812424814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d2105367dddb052898b07022c5f81d8033d4d1ee89cab1ae1424664955cd7b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CH7812531794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfde35410efa5b91cf89392925ade76ae6b919a1600bfd2355eecd0a6ca3e23. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH7812531795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250850aff131264008913a9159472929d2d044a436a0ccbef24a6abd23f4171b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CH7812531796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d1e4b33a1f5b8d90be772246e3ed1d37891343cef49f795bb982c3cf100e8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH7812531797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a79c12542d1767aa93057f4cbb8128cc34b5e2ea64536fe5cb428f9a72091. 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/CH7812531798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09907635dbc49ba9e8bde748414b7c42e2cb128e43d52b8b38d7448f5b0babae. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CH7812531799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2450b0c210917282c7104809080d4aa753ff3e8a6b3f3186f1eb29b36679ec. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CH7812542696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04bd73d8de310c7a5019ba23faf4f94697d67b763591e2016002000e8c53498. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CH7812544996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cadddd3ab2fe240d938dfd324045bb1e55c2b958b5d1082df723cef80ba3a2b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CH7812545905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fe3144c0968d54cb592c8f830b8b028d2467416cc1b145b72eed510b158a78. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/CH7812545907.