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 0x909bcafc10f3a13f7b8a0651ea3910b237f7d95b66aec6e2b3c772a59a94efa4. 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/0382dc33-82a5-413c-8134-be1b7a0e6409.json and https://artists.proofprofile.net/proofs/artist/0382dc33-82a5-413c-8134-be1b7a0e6409.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 0xe518cc1a0139307eda04b9dfc128d12cf2fd35fde6c60765e324283ca9f03c52. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR10S1558763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c65a14a9309437a34b85d7f0684f06f8a66c4566178294198868007b933f82. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR10S1558765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491dbb8d363b7cc2a170a863ff8bcc1557d8054936c13f940f43942b7437495f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR10S1558767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0040bb3102d2f0f4aab1c8ef4799faee91cb52443e22585bab08b11f2d5b854. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR59R1989592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431bb4e2188564f219a3adea2b199f1a15caa3fe28ccc7430e22a167c6b18bf5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R1989594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f5f154dec1b1fb5435ea8ad6c1a3a7e15843be4608d8c2c8205f73804a4e3. 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/FRX452070328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ef694d307b9e12e5d47339baa9caa7c0d32310d27b93d0cccee24855ad659f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX452070329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb589887c4ad407d6a2aa65366927b218764f27b98cd27b4a3e6a187aa6083d8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX762143328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c824e3398c82226aac0ccf8ddd9d19ae3104f2ad153aa28d943c604454ee63. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:32Z), 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/FRX762143336.