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 0xc3354d719deef44098f35728b452d6eecc20b7befcc89769892f6bd6572c2cb0. 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/71e1c32a-4a3a-44ed-ae78-52880d710654.json and https://artists.proofprofile.net/proofs/artist/71e1c32a-4a3a-44ed-ae78-52880d710654.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 0x266b171a2b71c7c66b7b00842df87f94bdabf422df5a3fbae2c0d987e019e686. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/COFC10028330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b28e521e26f69b9fac5c9abe158af7971502802a2f97c4271b612042898035c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/COFC10028332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021594348ba14667a4140b71f5a0adda415af450a9d4bf2e2844871d48d3c198. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/COFC10028333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6a500967409510de548e3c03b7b2f0583c98f4d5e1923868f06aad137163e1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/COFC10028334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd2302f65e6c00cfbf476452968149b7884a3326a04f53ad0fba55839d0948c. 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/COFC10028335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01e66dc23fc2368d00a027b1264191362fcc1470f6d40d01fd2a9a4afdaa2a6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/COFC10028336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3d93120360147c0cf32824591ccf22526f7dc227d84eb1bc6661b8677ba70e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USV351305543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ce9097cd3ab4851e84c8be55afcacfe4a90e230bf81dcdd2188df1105a8e07. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPYN2362531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099fe570f33110464fa0d9015ad72a8b1fe3ceca23ac4445e0be956073b9a67. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZPYN2362539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f561e4acc14ab1fa33e0fe8bc26685e4cb052f9f817292c8eba3ab27a75277c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZPYN2362557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff3f0c22c5b32722cae06f7755295364e567228f6c56fecfbc040fe34e6e887. 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/QZPYN2362561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39556930442ee456d4a22467e3625567ce683a0247654a4ca639a7a88543e8c6. 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/QZPYN2362570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d77716e3d6ffc8d47837cb8507d3b09e77fac059a7fa7db562ff180746b6c. 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/TCAFC2086589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee51189b3e28ba7752fd0ae38aad614327ff51d5da22bad0d326c80e0b7f947. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAFC2086613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26828794bf96fab10b127a2def03b1c3ac9498c1a3e35983ca8b63ca0ad001. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFC2086631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf579d75c91d195a537b08ebc4a982da401dba77826c7242cd10f8b7ebfa4be3f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAFC2086633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400cc502c273869de1145629535fc17136aa487b1f69633c37c58334c785aa3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAFC2086636.
Grandes De La Salsa Homenaje Al Grupo Niche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f642709ff46331c4783167ec6569a99814faf5655c3ea7b72f4015c4ad3055. 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/COC010225255.