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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5ba0eb0f10143ba51f8ea4fd9165f92de13ad3754ec250227d284b33b8d70. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21adcaf2-5913-4a28-a02a-e7ab41de9705.json and https://artists.proofprofile.net/proofs/artist/21adcaf2-5913-4a28-a02a-e7ab41de9705.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948eb3b2b884551552651624f7cc2e7e35b79aa4fbb986fd0204103b71567f4b. 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/DEQ121643365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd5c9ac24500dc0bb7271b8e79dafb730fdd87aa6a1f6f40cb207353370a4b1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEQ121643366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789b70f39b4fc9ed4e6c247531b94803a1f9c8c7fc0f541e00991738f7f2808. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCADK1721069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fefef82765053d21fd93694088535fa91dfc7f676d3c5c1f672fb7b5964600a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCADP1860792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d2d7864c1300d50c94bdde9679dd3fc771764f1bda9a64e7a54579fc4ff8a8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TRA161800347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82309cf49776047608ef7f0b06e6cda8a868b996067427e5bb2200afe63478e. 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/TCAEH1948282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddb2f0cfbe509e19ae209aafec443e4ea9304ce66925e542f59233b8fc8080c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:39:17Z), 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/TCAEH1948362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b824b8155a969554e124c3cb1100fa14299a7e7e199291a808954a62876cd0b. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCAEO1946744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9aad9301bd0202ab2a53f960d3633d9cc6b6e98b7c9f3600a961aadc2796ab. 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/TCAEZ2038648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263fbb3445d02de438581589677c2cf91b11fbc052bd98733ad1a05f6a211254. 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/TCAFO2191468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9416a602b70ccbc74d4f421bdaab0f64c6ebdf70b8bb1cc3e4711af0d6a1d7. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TCAFQ2186318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4868ea292cac3e6f2fb279cda6fb6c813074edfdb8eaa5e2377a0224e059df56. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGB2248003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebf98a22d598b7a2809933d6d5ad0b17ed1ca204a588fabc23c9400713f56f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:21:58Z), 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/TCAIT2449038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887f461c554606616c6514d821e96dcad917cddfe8c15b222f00f41f23f2c132. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAIR2461669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e3d6837db438521889d064e417b8cf3922258c5c4b00554884575fc162222. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:31:58Z), 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/TCAIT2451210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e03fa6b45fa775aea0c33eb9d8c731f519c7029d4528db09550332179e2df0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:29Z), 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/TCAIT2450856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0d812a79698e79f954bf1c3cc24f2c76dbf1259107af8056886f270106f8ec. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAHY2487951.