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 0x4eea21c7cca55cf5bc83078f620723bb7c70626a1bd4e5e3071f58d3ec357e77. 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/a2c5f05d-c060-4b18-b7d9-5f40ca4e77b3.json and https://artists.proofprofile.net/proofs/artist/a2c5f05d-c060-4b18-b7d9-5f40ca4e77b3.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 0xee04b4db390df023519474587a04612d837d22cd72aa83ecb6a6716ace512238. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:50:30Z), 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/TCAGS2387134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e062c1530168ea09335efb32e189539f32e23688d76299cd861fb3b0fcb9051. 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/TCAGS2387141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4660a5a2f6e28cdbc42fb06e717d795897bf47e4b94ea905aa3a2f7d39e5116b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAGS2387159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7440b8898abc9294c4ebed8c67fed3ce1f173bafea44b8b882df0c931c322c30. 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/TCAGS2387271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27980356d8faf2d5de35f1ed86bf9be72a5b0e6ab3d96e1e25fef497bb74c19b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGS2387288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f63ed47d3d900fb6c8a1b418e62f4a0559a1c4b176accd1dee22b9769c381e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:11Z), 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/TCAIX2442673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d3046035d8b7f1801f52a30af256bc25ec2d209eba5241f03b1dd8038ed32d. 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/TCAJG2575050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703f37651418f52e61646645a262604140942113f0db404775fd05e3f3e119b7. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAKB2506832.