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 0x2f8c01f0d90c55ef44c1145f91ad5102836376828a8027309812a4ca69497bfc. 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/1b8d4197-5b79-4874-b25d-2979bcbbd82c.json and https://artists.proofprofile.net/proofs/artist/1b8d4197-5b79-4874-b25d-2979bcbbd82c.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 0xdc531acb4cddcfbd46a83a80da50651b0c1d14a8abb12955221fe304880e88f9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA220800182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe94d04237e6b8898d660df8f7e9f1ee55cd2acd63a8ce8c4c0d770a25398b13. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/HUA220800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d53ecce51b737c488f444e7023c956512c8668391680a9bcbff5bf0b01bec. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:06Z), 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/HUA220800185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bab4fb0a015fffc9607d61eae0e1a9970cdd2910ca4d848ed285647dda96f6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA220800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87c842a8241e7b8dfdc900144502b3f61c70321fb498db44c5f54c3a1015e55. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/HUA220800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bece8cc84ae67a7edefb289e8216fc9e8fedd6638b5413c10fd1235a0ec82ff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:07:07Z), 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/HUA220800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e3c28d542cd849f60c8c20af99868a05f7e3fa4f1bcf5789a54f417563756a. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:20Z), 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/QZHNA1970628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef3373602cf3fe8eff2d2ac881ef423a0c22d17a6da1ff0de74ea718db75524. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHNA1970629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda463ecb1910b0451c26e678b17dbf0540005e888b8fdddfa0adaeec597bec. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHNA1970633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d06afb030752e0e3a7fb3c54c5e61034a39af7f0543a6a4668f8b0c31d4e42. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHNA1970634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff4a11752a49d0274763c1ea887c239e765b7372b0641abb111a97729c4ba73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA1970636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2318f8b12d8c078d69376ae6c124082088dde3938ce553ead6fe616a783cf6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHNA1970639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd9debae946fcfd3c8358601c20aba953c1b325ae6b827fcb5ce243e5775d40. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYX2528130.