thumb|Watcha Clan Chicago-2009 Watcha Clan is a band from Marseille, France, that mixes influences of reggae, dub, electronica, and jungle. Their lyrics include elements of Arabic, Hebrew, Spanish, Y
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 0x6e2a5815f649db2e5f1c112b13ff97fc19a2553c346c256f5ab2832384b83378. 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/9c4a28ed-bc22-4691-bb79-0ff416e0a653.json and https://artists.proofprofile.net/proofs/artist/9c4a28ed-bc22-4691-bb79-0ff416e0a653.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 0xe9b91a1150b9643ab9c16394aca369b5c343687e116f6d502e78302f0de74231. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/DEL120703006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ded753e08b6a2d9e9a7592e6e19b31968bfc9af7a8ab270844755a006a1d6c. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/DEL120703004.
Diaspora Hi-Fi A Mediterranean Caravan (Bonustrack Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bca1b24c70e3e93dfaac221444cb5b2dafe92fc276db8d6ea3383b04ac1b471. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/DEL120903602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb984a9da70e8a7dfaf2ce758b2cf8e3123ae49063cb011d86d643aa1b9fcbf4. 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/DEL121104302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e163899046bc99183728847af7cc52bc7c967ee6388cdb420aacfb56c60cc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEL121104303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24dd1a0e949054299fb249bfbecd69e31f5c61086a567b84086adbd6c6e4ab5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEL121104309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0e637aa98a2d85d6d8257eaad14d3614c0524beeaa5419353da593dc596e6a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEL121104307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b206ac6cade752bcc7e582e1789f5773487885b904dcec6f316c9bdb9d656d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEL120308615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c9004d1d12d437bc655c1bc29165081abc27f6e3358b0c0edb8bda1994179c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ATAH62050003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bca1b24c70e3e93dfaac221444cb5b2dafe92fc276db8d6ea3383b04ac1b471. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEL120903602.
Samaya: A Benefit Album for Cheb I Sabbah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f728ba69b7824a8490e4e319d5ec203db55dc92d8bf0a35d64b7bb9b7635f0b. 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/US6DR1101760.
Can I Get A Witness? - 30 Years, 30 Artists, 30 Titles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12673712de8dc93bfa097279203f28df047caf9bb55ab8dc6a11c7b444d6a7fd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEL120703003.
Raindrops And Elephants Piranha Re:Interpretations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353e073df80a34a4a90ab0a989975752041f5db91302728ac3d7682c62ee2d89. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEL120903504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7732512c292be507f7fe5524ddabb2aed03a14d2ad56ed21d9aafa36f9730a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEL120903512.