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 0xb56e74714c4a641a31a04d7cb16135865f3b1078360c0ac8de0695b6a6cc4ac1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d31183a-5c1e-43c9-a73c-452961456976.json and https://artists.proofprofile.net/proofs/artist/4d31183a-5c1e-43c9-a73c-452961456976.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 0xf1c82ea9c5a9cb7994f416742ee22a4a6f97dc5c10bf8090bf059a84f28aef77. 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/QZP7F2528019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fb6beea1c635b7ed12d9c13028f221a1ef50e2c4c39bb374107b735ee61801. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZP7F2528020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cc8e78e38fcf787e4b2171ed71e3fc3cc7c22e6159273f44a022b66caae5dc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZP7F2528021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463324f1ae920b1bbe5ecc98e7a5c7bfd475df0046511b7954d4a740cf7df388. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZP7F2528022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a9c16b9efb0c1e62fbd18a331bacdc47f12590f3b7ac88a0e470266160c19b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:11:47Z), 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/QZP7F2528023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336818fc772f0fa17f5e3c0e9b4d24a66da0e62aeffd052b9e8ca9c569cb9c3f. 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/QZP7F2528024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40059ad399d3cc18d64b44ca1f127eab8bf628fd4ef2bbc6af51127b0a8df85. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZP7F2528025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd7b9cd64b6fe32f73cec150e08e4020ad0dab9bcf3b2fe3ac8ac60b990ea6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZP7F2528026.