Tisma may refer to: Tisma, Nicaragua, a municipality in the Masaya department Tišma, a Serbian surname See also Tisma Lagoon Natural Reserve, a protected area of Nicaragua
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 0x274e622d3d435f12d2c04eb47d530815682571edd38ca35d3a6046a39258abe1. 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/7f72b71d-65d2-4b12-a1b8-b1da7f689ffa.json and https://artists.proofprofile.net/proofs/artist/7f72b71d-65d2-4b12-a1b8-b1da7f689ffa.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 0x610026a8151cb6597d0c9d05fd27dead950fdb4413b4dfb7d55880d92cca938f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR9W12444947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c87ee7d0e3ba5c220f0d09a33836be0e20ea3c97cdc82e3f49eb20de418a06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12444948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88097bc0c2d5e8f86b406ffb0fa74f032d42ab6ade19528a8c94bde0869fbdd4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/FR9W12444949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a7d2fd30d89b803b59a8ef132d802cd4bfb2ee986c392822d875e503c46bb. 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/FR9W12444950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b892de1527fec9ee57741e547185565a5ad45d7e5f55ac1454e759bd27b9d6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W12444952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfa071c3b9b9ddf4846e70fc053bc41b069a9ab8d4c67fa48b6d3c106f00eb2. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR9W12444953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ebbc2443bd8709f850b5404c424d6e5a428d0c547b96c44713188ac5d5d3e9. 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/FR9W12444954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163ce540ab893062bf66ede247510b9735e238922d57267a6419e2b68126aad8. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/FR9W12444955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35ab63cfb83102e0c6a9f97b26e28068e882ef5a2b5d765de98373498b4956. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W12444956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdd65a20d91ce56dfe67c108ed58a9ac5100d464e745cae4176029004eba861. 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/FR9W12444957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29297456108c0efa94ea1fc2d733f06b395d0cc60c0e0a6ad2972d12de5de270. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/FR9W12444958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939955bf95a0bef78819a148dbf9349588d26680641984e1f4a6b0b48c2968e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FR9W12444959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1764f309925e9daf009fcc7a0c060a8007c0b6fefb9b49f2cf5425d388ce43. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR9W12444960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42be2e95feaddd0ee72f360acfac3f3a25188fd8b34672d6303333559da693a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR9W12535493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff139f59e6e072c74e477c453a0d474d814b18cea370e9881e3d3b21a645813a. 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/FR9W12535494.