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 0x0db19d0f688ffc171257670329005add3a7a417633b50d1d608e468fda1ffc53. 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/de63e41b-247e-4b79-a524-1b048dece87e.json and https://artists.proofprofile.net/proofs/artist/de63e41b-247e-4b79-a524-1b048dece87e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sun Le Tu Dil Ke Sada (Trumpet Instrumental Cover)
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 0x9c0f03cc89d58608e4f6b61516cb43d2a315b094ad835236fe918ccdda1311c6. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/NLW2R1928227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb598c25efc1fd4b4a959d5ede87f6136688bf053c4b652cc4b8c53f7f30ed62e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NLW2R1928357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564c95ee55995e01cd7f210872c1c926b321423f85c1258e06a7c3b6283c63d8. 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/NLW2R1928370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867aab7f20d3a5fbc69994c990905d5257f84bfd5a68502f986255c6a233298. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLW2R1928391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bd06e883ff6bb898b565d5870e6f7f896b3d35e3b64f93a59c5cc9e3718f38. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLW2R1928398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52df91ccc731780095aa73b4ca875b8502045863e39a9cfd46ad6bf2e0959fb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLW2R1928406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5af26e276e0c4826d0550e99fbbcd90ddea237ce5e93093b4cbbdc73bcaa9f. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/NLW2R1928378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7440a3903f0cad7b146337281785dc852c3cd0fb5d3997e021d5c672f6e706. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NLW2R1928262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7cbd45019de2100b91ce587509829e0d8220f66ddce850c468e52995beeb89. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLW2R1928268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aa4d0f3658c5a24492584d144f0862f5679ad9e55115ec488c35ba01bbdb8b. 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/NLW2R1928269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f522c1ed3a48e340d41b2fb1c65d421001564ee3a5b330f21ffb5962649ba. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLW2R1928420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb19c530b949eab6f96843a2d838b149d6042336bf41758cb5fdc003fe00e56. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NLW2R1928421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ea32d0f673d01abfdcd17dab7925ee0fa17b6523a35fcfeae0f65614023c2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLW2R1928339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3faa0d28099de5f7e2464ae41dc602dff0a09c470dc669d324e96f0fd13d656. 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/NLW2R1928281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f65ef2e4788c105bc9f1fb3aca6526011616fbd57cf7c4aa4a088afe8390a5a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/NLW2R1928284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7eaae8b84a489da08186bb1a3542c3fb5e8392ea3094ff325eaacfc49e7f6e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLW2R1928294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e2c0f0f8467513f5ff7477c96adcbeb322d60ee676a316cdeb540396c5493. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLW2R1928296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ffc2e4a412190e0704209723b8fea46a8858f9f435cac19a48326788524b29. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NLW2R1928297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097a8c2f060cc14a1bfa5e6ae6ed2ea9edd4c4728b5d64869ba22b8120560dd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLW2R1928298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7886596f47bdb1b60054c881225da13a569726b558c8962624ce0a3945c996fe. 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/NLW2R1928299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3683e30f5f6e891dfd93ce72a9b1c237ced14e21aa7d348f6d4c2fc2998564. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/NLW2R2030262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd32851e1eaca69e0ebe932c2253909243be495289bc9e5e8fa4b62a23dda48. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/NLW2R2251755.