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 0x1730bb9b31239255c3adf7165183a0cb4e4d202dfdd590ee866a1149920ebd3f. 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/74d9e5a6-16bf-4dce-95e5-553605fd1808.json and https://artists.proofprofile.net/proofs/artist/74d9e5a6-16bf-4dce-95e5-553605fd1808.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 0xd87e541f54b9cd993bfcd3ea8a639f423ca0db8e0124a29bcc8867b21c016502. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:02Z), 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/FR2X41764784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89a74e5921a45d2011a20e9a0620304f1f920da48472596421101746e6a5ffa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR2X41764785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c8886e5ee910e2be3756b8e9bb521a8f4b4c5d7fc54aa2c6d77148c192a6c4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:56Z), 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/FR2X41764786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d2e4848505f0a95e80dfb364b9824c75a2924a5eba25716f0c1acd6500ab7b. 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/FR2X41764787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf18b12393f3b95c4bb1a2fa057795596a8634e3c8d8acf3303a340be69cff9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR2X41764788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8deae68bb4cef18507d16bc7e042e1f27481bada12885084cb6a284f7bdf84b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR2X41764789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda4b83f5de9140746563051f97278f67ceef975e8569d2dd7fe889f9b94ab1e. 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/FR2X41764790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50817f3e10593da1ebb9c5b5718834ed04e92bef4e5620c42324a5e166a69cf0. 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/FR2X41764791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564904901e24b0a28ecb02124e6d11a4289b7cd8d943d55970c64e23ce630aa3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR2X41764792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d58a9e841fc81f482ec7803e2c57adeddab918b1fa4189ea44b59365ec9b19. 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/FR2X41764793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5be7ad3c2e33e15731c5296f797010dfbb711395315391a78b2b49b5bfff7d9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X41764794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22db80af5f61377e7bc0853e2e293222c3911605b7b29af14f78410951b639. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:04Z), 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/FR2X41764795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cf36a321855d3434b023e4324e391840341e9a471d34097942baec517804be. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/FR2X41764796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa51d33d9b198415afd2b69a083e6ce094f74abcb0fd51a611aaab1be04b0d5b. 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/GX89G2462356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d50618e0677394d2b83e26e35a8e4d2afc4b1fd2c4ede6c1eae23186d074be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXBDT2377915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb3eed02545d9eb898f2309a21e3d05d9fcaecfe1077c060196b88c511f10c0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE5BU2429580.
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