Cementerio Club is a Peruvian alternative rock band formed in 1996. In 1999 MTV began to play their videoclip of the song "Barco Viejo" and in 2001 MTV played another video of theirs called "Sometimes
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 0x9414873339a7f73ecba81d5c3fc7ca9db0b092d8bcd837a17b5d380c5f815369. 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/a8a4a5e4-2d53-47de-a8d0-6a27b060b924.json and https://artists.proofprofile.net/proofs/artist/a8a4a5e4-2d53-47de-a8d0-6a27b060b924.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 0xa00c59dbbd1e81afc6d2422961b105948d170c634f6422c94459cc842dd64e63. 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/FR10S1666437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e88f3e9c93d205c510107d907fb41a64939ee5ac4468a6ba16092a84f00c7. 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/FR96X1503905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c1b7d3989289be0781eb982ea5cab0d40b0de8831fd80591918da8d7ca6742. 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/FR2X41467260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5f20921069b92cf7b105276031936c6e19529d833f510e0eb1721e55f569a6. 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/FR2X41471556.
Inmortales / la Máquina del Tiempo / Tres / Hotel Apocalípsis - Aclubstico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1047e64ee30b2e971aa7d3559a09c621180d5d6f0390ba76ac603d7e61aaa5. 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/FR2X41471563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e362a71ec5145714e350b21f3f469d3dae9b1902af0b0b8b1ca09f8e533d704. 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/FR2X41468363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca787a9e31f6384fafbf7eac730f7ac4241dac88723eb14b4dce6986509cdbd. 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/FR2X41468364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94995c1c65fcbc776dfd2ab7267173eb4e7ecacfa24c74a0d8170cff37b5487f. 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/FR2X41468365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15b108dd6c676e531f4cd45a8a40b40adcd8d8dcb16b85bfa9194c9cc04ba05. 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/FR2X41468368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b00298189cbb9764097335111d59bcf4e1adb8c26faf754938e5a644be465. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:13Z), 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/FR2X41468370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc37bac248ca6a22d22b49b3efd1cf69c083209625ef070df8dbd6a5acc4780. 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/FR2X41468374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d36469038b3b14bbea61bcc319015bceb0a84c012d2c71b1ae18c509aff5ea8. 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/FR2X41468326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4e3add828fe8fc19d69465b59d1b804a84e89a6eb54b93eddf195d0a7f909d. 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/FR2X41468306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7422ed9593032afc97d1e73f3e8ec92bc69786e2e98d83aefcdf67e358be3f. 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/FRX282065657.