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 0x2296e08096997ab4153f8f82d74a039c508e0bdc0600e5497c403cb288464418. 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/2bd4d052-452a-4fdc-b9ab-171a5756c2cb.json and https://artists.proofprofile.net/proofs/artist/2bd4d052-452a-4fdc-b9ab-171a5756c2cb.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 0xf70f153e046010a820fe05a3d9c0d2b89dcc79844b69dd2e39910ff58a9d77b4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAEW2005191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c05e327e7ac111822b0a3dbc13d84a184758f45a91145d34fa7affd8783ddfa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEW2005198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ac67885c4d6a635adc2c9288286ca4cab97ed4f42e8a790648abe44b8f0f3f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAEW2005212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee37716f16009a0ebe3de221082ed8a814381f149a14144f73dce14eba85549. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEW2005253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53928bd80601bc8fb05ce008663e6499783f6087adb4ed8ac8478d617c57b7ec. 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/TCAEW2005284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0c69472b6b400c9079a38a1a41252e7429d172ca27ba2fdb7ac83b9a1ac18. 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/GX4FT2406001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd4c16e8dc4e7418f5925cf8705c1715f33945381eb1a624873c80cb1598157. 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/GX4FT2406002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f39a882e4ee69792998b67d034b16176d690e3a4ffe8835cff4963008fe3b. 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/GX4FT2406003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad84832263b5db0356c6766365a84c1372e9661eb548af82fd7da135b393875. 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/GX4FT2406004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d34756818ca76a8514f149965eea004ea9f92b96beb4116a77ca0372700ebf4. 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/GX4FT2406005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7e9f24019fa3d3473e42de56be34a0befc0a8d61a81f20797437372ae2935. 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/GX4FT2406006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b89e6af41b2d4047fa6d4551453ae83b5166f8230d9b720732ff601a37346e0. 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/GX4FT2406007.
The Big Clock (Jefre Cantu-Ledesma Remix)
The Big Clock - Jefre Cantu-Ledesma Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2846ce61f424336df03d779073967fc7528f55edc4a508982e24afccee87de03. 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/GX4FT2406009.