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 0x7b56f6c1f1a5c02c4194fbd212502244263d9ac010f98446f007ea46f3127425. 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/6f9623c8-4570-4975-94bb-ed6ac26ccdbb.json and https://artists.proofprofile.net/proofs/artist/6f9623c8-4570-4975-94bb-ed6ac26ccdbb.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 0x4d3581ca9b8dd2167d6bd19dec2c81b6159799ea9af3ca79f06a759ccf96146d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0M2366583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7664413c29b288ad6e80642eede927b757e9da36a97237e5a5ce003ec5f2390b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DGA0M2366581.
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 0xcde29fa477b6c9d14dbbdb3dd267e6262f0da985c6d3a558b8125869a9ea0df7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA0M2366584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc788b33fcef3625e67b51d03f40d786d141377acca35595e9cf44471ff7a863. 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/ARQIW2406085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9deafc286c56184a622254f079455dcd5185f6282223a13d227c2eef39ba1af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARQIW2406086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0591d48845b7a41833e4efbd48ba6d5127fea6addba07c81db3afb5b8bdc4c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ARQIW2406083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf266fdaee399822dddee32722a8ec1e250ada0db14cd973ea7c7a8af19dd5bab. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ARQIW2406084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d96607cefc559504a3c02f45b49d3766f8f1c32ad983c387abace5bfab9d2. 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/SE6A92321208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2135c9645316924e6bfcb2939c7b4bd92d51011b1f2e797123d93dd7dd57d65. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2380537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c5c05429aa035cf6eb9b639b7d2105bef3fe0eaec0fedd7d623cea5ba0ad36. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6A92362357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e09233bf46bac300320847ec5977e81c1625abb07ee1bf5f0330cf75236dea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA082388794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd541f4d4b48ca5057e16da7d41aabb84fc144533506c637b0830d55ef05e847. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA082388797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f09441f7f8304aa521bf64f606da96732418f8609d25d98c871799e4fbf217. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:40Z), 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/DGA082388795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac07d2d9b9d30a956fa62165958c07b88ea945c26ceaa24e910f08a4b95b6e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA082388796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d464914b82ec7a6e0a10ddb55dd3fe7f9239eeec3c2704eba09b2847eec4be. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA082388798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9069e18f6cf13f3e44077fbdda048554b08586dd75819d45ac0b62509cb810d. 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/DGA082313459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17cf242e9ab497e6b6f961a4b114e40a26d941287d7138e832987b5a033d477. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DGA082313455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6bc7a950e3e36a24584ce93b2e45ab5e6e12bb937ea1912cb3ade6e3db3d97. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DGA082313456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57afb88ed4c7c12dd075f9ce3ee5e102c31338c862a90a3a39fefa60a8a21f80. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA082313457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9532b0d1cd5b5159c832a4e46f0be8b8707d3185828ea86eb92e777e0d48e8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DGA082313458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f63f7818e0b738ff7fb164ed30eac36a53fab814dbeae03f5a9292591e717a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072375461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1751bd8bd3e7a73e2bbc8a31624e6ea7790308417f9d6a4533e0bd859d16f94c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA072374439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4290d41f0d097502979dbce319da4678972ada23d6ef957fd2cfd23e616b967. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:24Z), 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/DGA072374440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd820e6b90939174391d29509224dfb127c4f3796ebe184acd86c65db3671c0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DGA072374441.