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 0x638b58146e0d54dd8adb016fb8a14d452396d3ed3af97b8a963c260c334f7a6d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de2514df-7899-4afb-9352-853d53b50151.json and https://artists.proofprofile.net/proofs/artist/de2514df-7899-4afb-9352-853d53b50151.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 0x47350ea74fea33381ccde0db0c5f440b6cf9e9a0818d602ad702c90b4f7b82f4. 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/CACWV1981301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ab8c200720a3ac003ebde0918c1ecde0d0ee8e454b1faf3f0d2207e4d107d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:01Z), 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/CACWV1981299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5553ce08936acb4182450c0e041026fa97c6f9be7688e5839ce612062c548223. 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/CACWV1981307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe772029b789239c28f7230828aa1216b860c62018c6d08aeb481d45637130. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CACWV1981308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a590d2c0354bcd0f910dbb31db16b6de13077b74664b029a52a60fa51e6cc86. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CACWV1981300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dee1ee320da6653e9a70d5b59d7bde491b351f22ff25928a959eb7ca90ea43. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:21:49Z), 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/CAENV1931546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db7d3b13357891e78a7af5f46e116e64dcabc7210f4b5d0ef28d67363fae837. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CAENV1931545.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a8ef71d63c832a04c027f73297d4eb4e881ba47b78c948934a776e3fd08869. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:36Z), 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/CAGOO1930166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3b174cd2c4ed1be1b19a79f220ef1ba142d053915702ae30ddcdafc74471e5. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CAGOO1930167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ad1fcc1a11f09c44af6092d9789900590cb64be0da70c18373f2b9dceaa21. 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/CAGOO1930174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca76f43ce3250617f47bb61d1cc49c4615e96ad2079e027e6fcfac05de622863. 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/CAGOO1930171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60601843df6fdddbb01c91f7a02034efa86e717722eaeb8c8240f57a89c8f58. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CAGOO1930206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84378abdc206e4331df8bc235fa16df9c69915b519b444921bdd1ba4e3a7269c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAGOO1930170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7684694fbb00c33e04a38bff9e835cdd6c16eb4668458f029fddd4c5627d4594. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:33Z), 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/CAGOO1930192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98ed14de9c58d68e557bf47e4f03c5ab04565a2f7c27c109b67864ef7ba4e05. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CAGOO1930180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d79b2c64c9caeed5e5a6fb7014196bae0f9c34c0aea6486774e3dca221158b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAGOO1930193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8689c5b39cca0d0d2d929f8f8b543bebc28d40c984bc6cd72b7e2dc3bf6f435. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CAGOO1930194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c9d2f0eee84d8fd21ca611ef67bb739ec7a037ab5d3fd169bb119edd960a7c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CAGOO1930179.