Hof or HOF may refer to: Places Austria Hof, Upper Austria, see Sankt Marienkirchen am Hausruck Hof bei Salzburg, a municipality in the district of Salzburg-Umgebung in the state of Salzburg Hof am L
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 0x846f7ca4796e3f4306e76b14527f904b72cc911b0916f2858ac1ba6c6cd81fe0. 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/99cec533-440a-4b85-af31-34f6996e0933.json and https://artists.proofprofile.net/proofs/artist/99cec533-440a-4b85-af31-34f6996e0933.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 0x76b15d03f89d46222b243adb0b7dc58aad50dc18ff5c601e4311ae4e8e9063cf. 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/GBUR62000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9770897cb80d345d78bead72d4df418c064804ff8847fc41adb4a7bbc95a4412. 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/DEPI82454399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37dcc45af4ff0cfece4a73f60afed274dd8b95d590e5341e6e71f6d200f4fb4. 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/NLQ8D2400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e98c745bda86c3e86b6184d54128831a3929473e35e140427270f824c65150. 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/DEO152000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6f915702797a26c72f879762b8119ac1f389602f04a66a2b167a33cb299af4. 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/DEOI52000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c4ce0e3a4fa610a2c819b78c79f70b003599aabadf05c31f02528d1274345. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEOI52000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51af596ce99e2e56205dd954f0e54b6eef2d0c927ce395ccbd71a5634560d95. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEOI52000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6eb657ed22f254917075e36bd6b81053ff7b29f8ec57e84bdb8b0feb994fa8. 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/DEOI52000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9841ff206bf4fcafc04bb16b97c6a08d6c88ed95d5113f86f89bde5bff548b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEOI52000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7cf0e13e794507caf7fd5464e66d049a3d0ef0b07b2e2e362dfd3d6a07e17. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEOI52000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2facee41c550f4d4cd5ba85c10eb36bf6e868b3a8c8e55911e96e6a79f95347. 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/GBUR62000682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fe93042382f1667fb4c2c4eebe0d51015ea6cd92b84f8b679d34295639813e. 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/GBUR62000749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d35f7b0cc860bd78432a1f2c90c70e3e174d58e68b8d2e5a09dcb1f6e91d64. 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/GBUR62000785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a94910e1a5f6ec1664b18914c31fc9a6b310434f5708b4c953de9d9ea6feac. 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/GBUR62000756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d350e1b7a3f69baa80503d043db60aaa27a319b75f6a3de92c2f3cec6f9bd. 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/GBUR62000759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850719876e372c5894faa3059a718bb1e43e139f2d60542fe61153251ca19a6a. 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/GBUR62000800.
New Generation - (Space 92 Remix) [Extended Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b36a8b0e6d8b8bc01272f275101e50785dbf1b880b297063ad5b195deb9427a. 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/GBUR62000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46a28e3c44da0ae9b1ee6f5bf9e94d908087a1cc02342f34b516a0c07b9bb06. 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/GBUR62000816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bda3f49b22df51f17da76b19fd430383ee0ce802fc11938cf1f3a424df3c7. 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/GBUR62000824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed357adb159a6b68a7b771394bc9ff91220715968db7584d030b907ed2a4fb8. 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/GBUR62000830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a98a978dde92571d736499d300d76567da87e47f21a7b03d922c0ce4298de6. 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/GBUR62000843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b25d62b1e8f117a836b4c41a2513deeb2012cebf791c7a05ed9edb4a042149. 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/GBUR62000847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eb17cdc23b6dd631fb3a0ae27e2e1c4f7ae301720d40cb0ca8850794ffb1f7. 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/GBUR62000855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50c35649a99273f3bdec97c6e6ad632f6c51d9ab5f5d1b67acbc29b0343d0b. 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/GBUR62000873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccbbfd7cac466452f6abd2e8da535f226c15812ebc19e89c8fc62514f9c53ac. 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/GBUR62000863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b94504be64f5e1b74194a169546e2850775c65677eb2de665b2da135dcfe8. 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/GBUR62000881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb5264e201d4ef82445e92e25288d1e770be2fe8a743df9331904aa9f8e9fb5. 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/GBUR62000884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3ccc3a2f96f9b785eae26386aad36bac563239ed5751bf8ea558514a81cef6. 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/GBUR62000887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687923360eec12fd072365f830761c96585b2d40790ad51731f44e35948834cf. 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/GBUR62000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a73f8edd2a0d0ee0f182bb4d73d0fd2c366ebe6bbdda492defc250bb83d5b. 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/GBUR62000913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267eacdc2209c377f09533795e4c7987cae127fb7a918ca66172e8b256cec76. 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/GBUR62000915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185fb4a5dcb2bae6336f5add8a56b20248e1dab803a1458e537b263628e2259b. 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/GBUR62000929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999d92c11a0bdebf8116de3337be00426fa5ff305b74e9f6539e579c469421b9. 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/GBUR62000931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5efe19ccfed61de7831c3cea0b28a948724b172f5993eb8a92ae63f65147cc5. 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/GBUR62000964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7035fa008888da6d01e7bf9c3359f5e79ebf118928e574dc8cbcc9feb2de4b53. 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/GBUR62000984.