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 0xbed1ce73fff92c8c4adde4f244294de9c71671240eca0fe4d5ca8e004f15b2cf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78e8ea23-2093-4ab2-a98d-53c32eda6c09.json and https://artists.proofprofile.net/proofs/artist/78e8ea23-2093-4ab2-a98d-53c32eda6c09.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 0x1a78bd27b0522e812acd99abdcce23fbf00bed3030331b4c586e49a8e9d4c5ab. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TR2180610502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5547ad623c99752eaea589274fd1220ea6fd60855445fc173366a6d7120d00. 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/TR2180610504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d80569260e60fc4f7505e2d9618042366fd50d03b135390c0f0a3b4de5ab3. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:29:41Z), 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/TR2180610507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447d6cde0ebd07f5536dc89dcc0caaa2b9454802cb2d466badd95aa56c60c6ca. 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/TR2180610509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b683e46eb8b73fe7e407c26c3508905f23e5b10789e17805e39f47a6a513c1f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TR2180612102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed74c9b9d11b9e02b2ff0005790ef915370fa44fb04b7c40b67bd914e163df82. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:30Z), 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/TR2180612103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fbefc3980b745d37d573ec9755b07232bffa2ffcfafccdfac2e246a152b9f8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:57:42Z), 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/TR2180612107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8002a9130f6d5d2f62fc4a24cc9f0adc2dc85bed8e18d65cbf7f0fc6bea36a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TR0320600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0782c02846bbd68b7defdb920d757bef1bd91217f2331501a2ad05cda4e6524. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:23Z), 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/TR0320600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e3887b9203351ed2db263f65763e24d7c050fe4b2da67179b00f3e369e31f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR0320600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f06b4ae8556564b745609ab58b081c5d92f21c673a7d75d25f9b405b5141b2. 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/TR0320600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e29f19a04f58dbc6f45ed9407d5f58c050ff92a91c92a713e3de322ea0ee75. 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/TR1541800002.