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 0x57918260753942d6385d5a8803e4d6e505dc55f0a80ec530eaed87b46f8f63aa. 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/6b841884-e54a-4d42-8876-b4c1080219ab.json and https://artists.proofprofile.net/proofs/artist/6b841884-e54a-4d42-8876-b4c1080219ab.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 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 0x3c29e64d5ce925f2755b217c132b30e6c8cc1214d90c09aaa87fd99f629fe811. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPJ901304721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae83af1245156309ba5079d397c76f1a395c681092cd1927d0db28613adb49. 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/JPJ901405370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb294ef94515825bf1411fa1180d4fb69802ee49475d4962aeecc8716f0b9a9fc. 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/JPJ901405430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a3f936ee33d305f3fad4af11f87f4cfaa47f2ca7430897c1fb9b50e69f75b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPJ901405380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefacdd819ee1ca7e7f574edd7549ed96115569e5e6495e443496474fb4080883. 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/JPJ901405390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5ff4ccfc7e1b3eef7c769af10d02eae3af5e359097529b15fbb9f11f9a9e4f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPJ901708110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986f9e93ef3966835d170daaa5ee353a5021c65c4dedec568e36408e34d450f4. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/JPJ901701260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b661a6015bfcf12ec0a5584d6ad9236edbea62fd66a4202b98045e6cffb41f0. 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/JPJ901708160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe648d1c63055b2083f098ac07a3d986174f1b1f334b2dcde042e0b555bf7a424. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/JPJ901708180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e340b99949d27419db4c734f45a1d76e62ab9077057c3fb073d30005580be2. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/JPJ902004180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ca7bfad6570bb0b0d78fc26791f065d2985ac7a69ff8ba4480023ca2bec62f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPJ902007540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3695ee21e1cb5dd470d068f7e237c61d1b6dcdaa971f9a15f3cea93a5b16520. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPJ902101980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8160ede97aabf767d855db433fa27aceb2683e6b8a3ed06c8f841cd2af15091f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPJ902303920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2677f5be47e7e9d6918452e3bd1d57b22f22c5b2c901cfb98725f5ac2eb8ebc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/JPJ902305040.