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 0xe32121d4eab2c45ce9ccaf05d68dc15c149bcf073a3d3090f52b170277e7d827. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb18da94-480a-4ce0-8f45-f0128ac16ee3.json and https://artists.proofprofile.net/proofs/artist/cb18da94-480a-4ce0-8f45-f0128ac16ee3.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 0x28634977dbdfbfc4d08880e2ca9316dc5c8ae39df0f95366f33024d1bd0563c2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLV62402180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c0abcf355ed7641674d9cfa7faad4db09f75273ace3141cd76ad92d8530c61. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:49:55Z), 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/GBKQU2504053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3f95a6a3c2a4d13690b4bd0e6dad03a40b47f8a1bd192f0724856aeaec3823. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBKQU2517309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4202c1d2c4e1b2312db665bd93fcf89923b08f4b32e560bf9395601540b74a. 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/GBKQU2517312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd38f7c40961f4ce43c31de777880254f3ba30750d38d92ada840d3fe0ba9bc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:20:04Z), 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/NL8RL2509786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361e8f2daa76902642633af4d660b470e9a5a3be4e3ef38949831f28070cffa9. 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/GBKQU2582586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680dfefbfd3d396515beb476f1a8cd2756e7c6c14a25e2874e7796944ce2d2f7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA6D22300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7347f5bc04131ac56503f35e87eb2637abef4ef53381957b0041b0a0f74bd7e. 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/GBEWA2302700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962becee1c9a065f1954da7d74cae730305afa92c3abaaef6cc7bc8068f56536. 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/GBKQU2460364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b5d190562ed229461c7ba8892dae50e28eb91b9b9a9e16b08569cc6888bbc7. 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/GBEWA2406673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b54490d8605eb0acc2f56ac9d72f685659658402d0eb7c6e6e8e25734a10bc. 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/GBEWA2306752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40c6876527d4152703e77c9acaa250cfa3bcb089f06505d7b7a321397bebd99. 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/CA6D22400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aac39c07e1c407e5e2481baa4d77293d6c04a6602b684a0d80a6ab304c5b4cc. 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/CA6D22400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6f2df2395de618d2468c1eece56f810b20b22a82a16fe26888f39b4338239. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2508487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8cb03c27d6be087b3ef814f530a0a8b579b390e9bdf39ace9f466ce0ea7ca. 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/GBEWA2405681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c31b6229ad15fd0c26934b6f98cc4edbfcce6098877081a69e707ec7fc3fce. 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/GBEWA2502303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528d7d6e8d5e2cf5b9caf28ee9e8824be896837c3bd512b51c50ad7085dd3935. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEWA2502414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde5568f6254ec864ad90588cda8cd0f6b356333548a82a59f11cdb0877889b. 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/CA6D22400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380e6f814b01b5d1f3ec945b7cc07eb8cdf368c84b485ecda40986ef9541584d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:32Z), 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/GBEWA2406477.
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