Nosa or NOSA may refer to: Places Nosa, Spain, singular population entity in Balsareny People Nosa (musician) (born 1981), Nigerian gospel singer Nosa Igiebor (born 1990), Nigerian footballer
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 0xde76c581583e1a24dcc99628b2bdacaecb54458f20536e0357b091ff3fbc2efa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca31c4d0-d39e-46bc-87d1-e4c16de64ea9.json and https://artists.proofprofile.net/proofs/artist/ca31c4d0-d39e-46bc-87d1-e4c16de64ea9.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 0x6b6920dfa4138a51a1878a53274353966657e4186630d6da01611849c58e2f65. 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/TCABU1485986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec56017dcddac8165ca3243ab22845b404d727e69c7690377268c0a7f64a4be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCABU1485991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03cd72f7f22479b92983b7bfa79f924e15efa16a04adbd26c3f5e626cb23932. 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/TCABU1485993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e645139fed4f604238a60ff9154811b610def70e00457073dab1bdea189f07. 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/TCABU1485997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce05455fb34216ae92f9d3f8228816ff8b2194d90e2e2f6dae1c9b8bd1f7c120. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:40Z), 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/TCABU1486001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe2a84470f494d98c454b82c40597656265e6830dcfc77a05008e1e76a6200d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCABU1486004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abf8dd432fd5679810bfab226deea04ddf511da02b650eacebd44bda73311a2. 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/TCAIE2471722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada4cb5440c69eaed6914e0b7ce0af7624d61328f6533a5ba8540fd678612766. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:51Z), 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/GXBAV2341156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87418d30be0a3c86bc9f4db14a3cbcc4bc11f86a64ca82cea48b1a543fdadb2d. 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/NGAE12003211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de50236556b6e548a235f7e4d52673a81440d75ccbf53391e8a1b2535e3d7a. 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/USCGJ2390661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd171d1930f82bc644c7155c964738e083fac2a0a1689ec69549b4b4ef5770751. 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/QZTRX2215950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fe5f6fc539ae0c2245110a0f46374efaf4dd0ff55b10f805bbd1f0eb24d4c3. 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/QZTRX2215953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf89f580e85582ecca080db7d0f477a521c044c292d6dd2cb046a535a8e86fce. 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/QMEU32002120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e79ef34d0a1b2e249b3425daa32b536b0739daa6cc479d21aae447ffb15da7d. 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/QMEU31915745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b69027984bffcd54684042781480ae0b1ca7739f960000e6f8032edc29b81e. 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/QMEU31915734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc8cc8d0f7070e862775d7f405d3cadb1bd8ace2fd05432a8a164d932ea3e92. 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/ZA56E1601238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b4e0f7106e13aea8df2233a4b401445384b70540233af1480511aa8527f4cc. 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/ZA56E1601236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50861632713805627552a06422c8f4b6ceb83e20401237d382c660146556dd6f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFZ2126152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d4e14fe4077a4a3a829dfe9983d148de325363b35c4e7e62baa18cbbb5d94d. 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/QM6N22372630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6dee49817b0f331ae83ab05402fae47ba2afb4da2485e9540fa2bb59968594. 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/TCAFZ2127099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce884239b78293e3ec33706e2a537957f4c3d94e619cebaafefd84f5fc450234. 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/TCAEW2015436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222b15ef21b5fd5f2ba769b3e1a89736fffdcf1d55fd93764a31793324331869. 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/QM6N22373025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1738cf8574eb7ef5a661137e455772f9fa5bab082bab51b749367d49ebc57a. 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/TCACA1477013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597fa6c837c3d6ddadbb5c7d9b7414f0e42705ea8cc7cfa5da5da1be42e644cd. 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/TCAFC2091177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d2da26103b0a251bbb60927bee94e179209d41eddf7b2b4a42b94135a50fcb. 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/QZNJZ2211316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a5dff80e2d74e171835f56fce337970f7d0ec4d9e398be73a4ded78d52431a. 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/QZNWS2155340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d345e6646e4e7bcbea26e1992b123220231a1d930e0e8402acfdbeaf91040. 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/QZFZ32204714.