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 0x58af69e2118decc8a218f3ac36991ab4af59fd7d9ab2434a7fe77205f9958aa7. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f294e96f-42fd-4201-8031-420d2a6a6dc6.json and https://artists.proofprofile.net/proofs/artist/f294e96f-42fd-4201-8031-420d2a6a6dc6.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 0x8c3754d737776c8a615bdd1b1207f8b1b183d3bfc65b1b2512fd77e5eac00c79. 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/QZWFH2424181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa796364a422a846bc77317a780d31dc13ea339b592379eea316fc4bbbb090cca. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZWFM2471041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a139e07d424c21ad06dc109a9bcbb29ee968a8122abe37ed5de00c26848a3fc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:59Z), 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/QZWFU2418052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c7f18d0f70f9cd9fedf14f7b8d50039f8f6a2a6d84c89b56b0d9c35a5bd412. 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/QZFZ32535972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1f03e960318c3c9829bb3c28cd102ea613c4cd1758aeee6e7678d332a49de7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA72511368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb35ff355bbd485746baf944905922dda8e1f3dccdc123f24d75d777a3242e7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:29Z), 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/QZHN52599523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9be4d6db4b7c4f73442c59caab00375620acbc8e12dfd78c917312f77ddfbd. 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/QZWFV2582748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160afbfa0dd0a756a118e35fa74fc0f3dfb9f8556d1f6019a479e25cd3a71a8e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ7L2553759.