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 0xcb5767e166f24b33d8251386f4148e9c60f4f5cbe0952bbd43282bcfb7810b21. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/135f532c-d4c6-4e9f-a981-929b5b7b67e1.json and https://artists.proofprofile.net/proofs/artist/135f532c-d4c6-4e9f-a981-929b5b7b67e1.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 0x3890a01ae4bd5335de68037233cd2a8f4847858abcc9f263d69b59aa9aa8feaf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNW72380498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b18105e552689928418d2be4885e8e5622d2569f33e73b3347be1107c334508. 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/QZNW72380499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780012d94a8534865aae1851289c2fcdf5be4be189adcdfca8ba7b9df756262. 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/QZNW72380500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c2452608a1ac540df6ef6465cd8888f6304010a631ea93214360f3d07a40eb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNW72380501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8588e43d75c5787079839e6a810940743a641996cda80968ee32dd701c25d0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZNW72380502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5230c067f0b4e7a147d8fdd30dcfe05f3cd373c6c56cdd9b76108eb33abe9eb9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZXLZ2518950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c45bf1f548b011d70cee4d651ca85fd98f92690b0b159a64dd2506033750e. 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/QZXLZ2518951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f3ce6f6c50b08a674fef030f7e63e9e54f565a9614364eac6b1275513a41c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZXLZ2518952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b419a2a68312bb7f617e532327b3b81e1188dbab9b3507ece696b5647abb5f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZXLZ2518953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a279e28e2199af4cc765f247c99819697b91b77b53be57915fdc36b3ed3ffc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZXLZ2518954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c4ad5cef91073817acdfc05814a97524620448b80716028f90028bf0cea85. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZXLZ2518955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebe9ef4d9b7cbd5cbdad615588fc889003c55eec43395319de0da8631df0965. 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/QZXLZ2518956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7799d323e33de2c2327081032d66114ed6668853377943c8e7d85b130de6f341. 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/QZXLZ2518957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b51d923b480004bb0f528fbe363ee1370dbe9aa8b97e498953070188dc49f31. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZXLZ2518958.
Uno Somos Todos Todos Somos Uno - Remasterizada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e407172b20e8eeab2b978f478b10c46e370e411acfbe55d548512e77674971. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZXLZ2518959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d555dd7dd508c36903512ae9c546665e5c8b85ace292f307492a9f76f94985. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZXLZ2520511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4c1d1e8c2ccffd99b2c74967ff7a4b949b641cbb9d3bacb9af825849a38f5a. 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/QZXLZ2520512.