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 0x1762cb05ab964f2c624502866efa0af9fc567f45405f2bbf3275fcc76897b000. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97145c5b-9299-4ed9-aa7a-27392b534888.json and https://artists.proofprofile.net/proofs/artist/97145c5b-9299-4ed9-aa7a-27392b534888.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 0xd5f742f381171e8f555529e96168354848771eb14758d15b2678297eb88b7cd9. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/CAA0I1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d03940f32f53d29281e29c182fd2ca4833d26dcfc88cbc455c299aee8059a0. 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/CAA0I1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70de3ebd46b1e30b72d77c25a9d9481b8733a383aa881b569cf1f5371b0b8b0. 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/CAA0I1800021.
De la cour au jardin (La vie continue) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f78cc690a24e250e757ae22ba0bc6a647ba453abf2a9fe0f9c095d6209e341a. 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/CAA0I2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5bbe64861276d3709cf4fe0bb263ef65a79ba0d07954071af9482af01d3d92. 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/CAA0I2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f8bddfe4ee1e3120418ee837c66c603cd44b28cd3b74a550fc0f75970fe327. 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/CAA0I2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f9d730c4e56eeb36529fa70af6d29812f690a0dc6030eddcc252285a3f7328. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/CAA0I2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec8bd4b8f0bdd6baf8019c94bac6a8b8e8163961bd7f975e1fdd9092cc85a16. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:47:55Z), 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/CAOS92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51422bb8693ad0a22bf2fc0799e296d0f3ab5ccf99d350e8258b38a3a73f07ae. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CAOS92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf791fa0bf5b33f61542f3b6e42e5cd0bb85f82a4e1eeded8a9e860250306a693. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAK861900096.