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 0xf98cb33ef948699a278c49c3bfa336758fc648aa945636e09ca8c23d89b3fdd5. 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/c17bd3b9-0e44-4e9e-b5a3-56a9fc05f656.json and https://artists.proofprofile.net/proofs/artist/c17bd3b9-0e44-4e9e-b5a3-56a9fc05f656.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rap Tanjiro Dios Del Fuego (Muzan Vs Pilares Pt. 2)
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 0xd67d8d24d5c2077c45b0f5a924be22bde0b15186ee08e45eae721c36136ccd0d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWQ2164983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf8451ccedd4e86285d745e08b5196fe5e0b60e93ae6117317129dbe93db523. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWQ2164987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7926ab7cd72f44b8a4b943094373c16cb6d376195dece95f3855a1b216d139. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWQ2164984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045c1554507b452a94d0edb8bd8256a83952f756674f536e2f1b1b1e1a7fba66. 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/QZNWQ2164990.
Rap Los Caídos (Sacrificios) Kimetsu No Yaiba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642123a5f441d6b2c5a85bd6aea02732f9f951c244f35e3d5305b0dfedf020e6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZNWQ2164988.
Tanjiro Demonio Vs Pilares, Pt. 1 (kimetsu No Yaiba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8397f5bddef58119ef4486d4c19c65f8835b615faf280bde39fc088addc0f16b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNWR2120494.
Akaza Vs Tanjiro & Giyu, Pt. 1 (Kimetsu No Yaiba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec86e833b3cdbd65d811d8e19643e61e9d74c504dc47c744267c657911be703d. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZNWS2142985.
El Origen De Muzan Kibutsuji (Kimetsu No Yaiba)
Rap De Muzan Kibutsuji (Kimetsu No Yaiba)
Rap De Muzanjiro (Muzan Vs Pilares Pt. 3) Kimetsu No Yaiba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cb03ca6c5cae47252a34535f47680c206647447e867c00351880e3c52a30c1. 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/QZNWS2143862.
Rap Kanao y Nezuko Vs Tanjiro El Rey De Los Deminios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e8bfe2f551fec8bc61ddc7eaf1174c8ed1aca10ef690f92be0f5f35f765bc6. 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/QZPLR2175141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd680207af9b5f06f85228fc2404a334a956206cb43403cff5a54a5a0c6a6b0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP42120766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b7d9bf224ebf41c2b160b5e112dd26afb2e33dc505fafd2444f67b39d903f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZFYX2281990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4536e117a5d026cef912c0513d825c6a26c12cd93cdffddae644f582e7dcbf9b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA42214852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aff92c3c63ae1090a5713aeb918956e6bd0c4c9335afcedca78e7cda42612b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN32254453.
La Eminencia De Las Sombras Rap (Primera Parte)
Pilar De La Roca Vs Primer Luna Superior Rap (Gyomei vs Kokushivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ca3419e1f0840d91125849b1d9de697821322a94c094bd9463883264621900. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHNB2348366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb919104fb686e4bd04acfbbbdf88b7c28a980bd9e13fd9528d8daf1114d2e1d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZK6P2502861.