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 0x8f304cbcf37a84502653de6de8d0e5560172550348ba68e6e8071368897db69f. 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/e59a6dac-cc24-476f-a317-dc894c2e2910.json and https://artists.proofprofile.net/proofs/artist/e59a6dac-cc24-476f-a317-dc894c2e2910.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 0x8d0a4d249e87dfdf241cc72270982f2f2c65d0c3a18129308e46adf3193fe4e7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INS182400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be6eab706f4c0f0c5f87de59561422e1c5b8bbe987c5b24c5ed3ed1554d3a21. 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/INS182400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dc6e3030c5756b314047827ede05ed1b3f5fbce77eca6a7055b26fdf10268e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:27:35Z), 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/INS182400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892b03156b51f6891ca68a3551d8d1f421ca3325ee80aead843bda2f8c7d01b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INS182400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d996826cccc7ea254a0ed7ec1af427457b552100071a3de64cb552719a78cf5. 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/INS182401488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3268ea2fe1901df93531cf153e27dff83d164816b90dec384d75fb3b61ba085b. 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/INS182402095.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba0f9fa5b0e05742df35af70d439a2026ee98928b511fc7c932b235741d9428. 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/INS182302262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa4563ca4aab3ba4c4f0d3bd77599fc22b94ab0fd956ba5967d788cd6a7aea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS182301372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d3219f97363f58848f5ae611575acf5718b75bab16794e0b102d26a4b1173c. 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/INS182301310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c86954e6dd22df304993940fe228b0a4a217d2cc65a96f17da104f488c6c48. 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/INS182301245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003fec1915c2dd61699ab0acc90a55838954172ea15f73c2567c46154efc65f. 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/INS182302493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a3afcf78489d383c40f28d955051cfd04ee155a88f19d336b990dc8acdc30. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:20:14Z), 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/INS182301657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31480ed4d8ed7c246654bb8df9470f1327ac9a5e3e24d2334e2a40d679d7d4da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS180901452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e612f1797ad0bbc4b8b6f183066bba5b827cd0638f821128e7120b3565be35b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INS180901463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad62039aa13d60224f598e42a22dcc9491c00c0ec9f864dfb5666e042d18f52d. 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/INS182301373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aea84e4827a29d0fe5ac43a23f2af62aba5c08843ab17469bddbf63c85d8fa. 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/INS182302600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311b5108262af8b31a6e752c92c14bac37c7a811a413d5ed85521f7218d69d9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS182302601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ebb946bfa0453f0b71dddcc6207499640cfd2674d7d22023940c73b5f270f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS182302602.