In traditional Persian architecture, a howz () is a centrally positioned symmetrical axis pool. If in a traditional house or private courtyard, it is used for bathing, aesthetics or both. If in a sahn
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 0xed91643d5af96a44f7a0337964cdedd53787c707043bc0b141e44d5b5b3daf62. 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/2b5c46a6-caea-41b7-8e6f-dc3bef0642cb.json and https://artists.proofprofile.net/proofs/artist/2b5c46a6-caea-41b7-8e6f-dc3bef0642cb.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 0xa18d99b0205e148b0533df0a5dd54e60855e19c3ff2f73bc43dbfce457f92e7e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TWCC31901517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a46ee68f5389bf4026afda41c66e6752b179f5ba66cce42b8b082c58940035. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/TWCC31901518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd3040514aebebb08a41265e4f46b3dc0a4525ec5767a8e8e6ac3923f56306e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TWCC31901519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bce5fda654104a89c3997b504effec75efdf21f80cd2fac57338a3005675f85. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TWCC31901521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c2bdbb162d68c46f003ef0d5e4ee89092b6ad92e6dd42caf7c231b168453e. 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/TWCC31901522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ab7a26d02d543a91fb1502b12f7c23006b53797ed27dd01bcb803ae4a6894. 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/TWCC32004295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0612a4a7675f1ee32c0ac7c4a37f347bf44e9c841e20dbda34a35944c0fb5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TWCC32007568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca8ae6bbd55af5b8dffd1953d0a19f7a4acd021d20dd462b0c60bedf55d4497. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TWCC32008839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca8ae6bbd55af5b8dffd1953d0a19f7a4acd021d20dd462b0c60bedf55d4497. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TWCC32008839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa64d91c9af5c6e4060d116073de3baf3e3d89d26c5f8254ab66ffc36e2e061f. 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/TWJA12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe78ee90d7290051b875df4a7640542fa605bdc5f255e91d6a5df02926dbcc62. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TWJA12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c4a4c85bd174bfc63b434438bcfaaa3fb1db310cf6abc4e6a453ab43aeab52. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TWJA12100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd292a50b8cac32de0d7a2deb095fe51ac4ddaafd52ecbe37bd8069d426e806ab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TWJA12100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042a3b1c2f7fd03a79de0ff979c8057534ccf5838364406180df037a87df192. 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/TWJA12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19f9ae514ad940e66b846b4bbaba42b5c2f68d8249aed459563bd47461e45c4. 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/TWJA12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e1ce9e493e009ddefa2542fbdb958bb6b97ecb60ccbddd9baabfe1a3a448d. 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/TWJA12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643931b09019e6d7b57a01013b60d496e3b32cf11f8d21ec2530e66351e4922. 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/TWJA12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3949606804c523efed2d25f073e08359c326c6917ded7e963c5c47b7038b9583. 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/TWJA12300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e1ce9e493e009ddefa2542fbdb958bb6b97ecb60ccbddd9baabfe1a3a448d. 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/TWJA12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19f9ae514ad940e66b846b4bbaba42b5c2f68d8249aed459563bd47461e45c4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TWJA12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804cd7b36a1bc25b59a19634803f7df69e9a22bf9d74cca4da808895618998ac. 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/TWA532500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ecb0237fee92ec2a41d317c403d041d4479567526edbb121e5ff371bfd01f1. 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/DGA052251333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fb389af805f7832521e2501263f5b5690929272a066a3a2b1d27a78e1c641. 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/QZNWR2314425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81b169dec5dcc6d9d48b647320d8088989284f233fa048960efc82325aaafdc. 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/TWJA12100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3ddd64a2e38db6c606d729a008f80856a0561bad41d9d830a82ad9742038bf. 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/TWP012263304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c95c0c8e83a0f9dfe0c9a23d2190c173ddfc3cfc20c1b82f53ab31e1e3d22f. 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/TWA452211303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a1c242c07ed228e3ffe9dda6df3b05b774beac5520ed389575c26bb1abde69. 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/TWAE32000714.
Thug Love (feat. HowZ, JAYRoll & Veronica Lin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcb0e3c15f3969e2af29f6a092ff756b41176be113420bef9ab06f68416114d. 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/TWHO12000005.