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 0xf013c3c4610c34897314ded5643f9f21c151fd7a6899d51dd4d00fa6339427bf. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48ce57e5-8cd3-4c32-a55b-9fa94d40cdeb.json and https://artists.proofprofile.net/proofs/artist/48ce57e5-8cd3-4c32-a55b-9fa94d40cdeb.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 0xcd5dd9c47adda086385797f5d52efca39b66baffba6d60d5b2b62151b32797cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXBAV2110591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa711a645663198e4238bcc71daed5b060241e140ac94801bf1b485f2ed658d6a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:12Z), 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/GXBAV2146165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb082ffd5b5440636a990db48787f2a496e5ca55815855af7b301970effaa5aa. 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/GXBAV2185947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ccebcd7db95c7a59dcf2773916036181f77cd0865eb065d3a4805411e06494. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GXBAV2167677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ca382fa7dd34d2014e5cef52d7872169449cfaa1ddaabc2e2fe970718c380. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:02Z), 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/GXBAV2164186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdbf2a7d4f7f35353e34db780e36568fb9e0a57df5df0d13abc3ff2b0c2be23. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:04:59Z), 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/GXBAV2158835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbbedae7702de27e593f17d93b424c9c8f7cbbf95a142c4b4ca821f55a31682. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:42Z), 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/GXBAV2190270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b3ec850436d2a2fa324e322d25e9cf00d3b1e2c506119de3d8eddf936a9f7b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXBAV2190471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca2bd7beefcf8f2463984571e77c7b976fc9bdf4d84b0559655a780d32aac1. 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/GXBAV2053796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6adf2c246607c84e8b3cf196eed51686aa62f7e93c27fe5a04726e165e3393. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXBAV2019948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa649ee9973d29e02cbd61b558d1bc886322c86edd68748fe66c67b0f2072c6f3. 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/GXBAV2167331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea80252ad6f5e61767c475bc06f558cf2941aa2e2da98cb07341a041a3521fd1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXBAV2088422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e191d1954622a49b58dc2da25ab420a6cfbc45d03e481acac0e6c701c889ac. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GXBAV2060562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11efed4e2694d93ee83a9be7b6ad016e772984beaf65c0c01b336d6cd4b22a7. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:16:15Z), 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/GXBAV2175536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1a62fc5cc3f6c8fd5852b47060ac8f0e5e672e7719957cbacf16e8345d5bab. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXBAV2085989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14876d7b5055f5ffa00dc759560ebe23047a66a7aafc63602e43f5e747f3db4. 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/GXBAV2025189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0e98637130cf1e4cedc5c09756f404db59589a552fb5acbc005c3dac865bc6. 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/GXBAV2087196.