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 0xb33fb082214933983a46203c5f836d7ae8fe3834b5700c5ca63a385f935b851e. 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/63dbf89a-2e9b-40d0-b641-9cce5f6cce95.json and https://artists.proofprofile.net/proofs/artist/63dbf89a-2e9b-40d0-b641-9cce5f6cce95.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 0x98fc003c058bef9252ff3031f4e3b9798b8561f8df2815920c92e75c8e771fc7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:00:22Z), 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/ITA642200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e56c8bf7717201d421654c32577e66a9dc5da88bf5d09e9ab76cd16266b455. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITA642200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e56c8bf7717201d421654c32577e66a9dc5da88bf5d09e9ab76cd16266b455. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITA642200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8841c85587ebba93222e09150e414dfa3d715415a7f582a24ac42c0fd149b4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:23Z), 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/ITA642300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4a0b370389927c80e8fa37a9917f37296357c9926e790a572c359e1c7b15f3. 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/ITA642100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e585ef6e1b9ccd277682d1f5ced85ffc4bae61656846b55b05c6f10116e8695. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ITF0C2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2888db108a77a2c8beaa4a06dc1ecb282438ad8645d8d680a20ce3e1a36eb1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITF0C2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518172f6f3a12107dc442efd54158d393c35042330c33d83890aa51a116e4c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITF0C2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02fffdbad3c4bc95fdd60a365c46aaa63c22cdb7ce0856a51a79d5967b2af73. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ITF0C2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecb03fe05e95c2130f08924b5241085ea5c84038b6d3921097c05222cbac828. 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/ITF0C2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46501677eae75723b358c376e6b6f5fa6567806f1fbcaf3a1d3f118b66eaa7f5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITF0C2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc44ed3f997d0847209fbf9f5b25ca55fd43aaf5c3c36e17ac25b137f2e438d. 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/FR59R2241330.