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 0x358d018cd9fa7529ff2c919c4c9eef8ad58a569cbedaa9fe3035350350a9ac57. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c48ccf89-c30b-4970-9dc3-24e25de40fcf.json and https://artists.proofprofile.net/proofs/artist/c48ccf89-c30b-4970-9dc3-24e25de40fcf.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 0x5d86c7be8e8386c6f7043c9642e2cad30414472875bdf05167728580ed88de15. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:39:28Z), 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/QZNWT2138379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224bcbd1d23cf9e6dbc6e0b29c172a173835f23c33ed4780b7fb92d4d078a9dd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:36Z), 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/QZES62370392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b64f478fa87d4a401237c26ed2430b5c285b15c259f5a9ff1879f028a67181. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTAT2370878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa9d072e3f877ebb4d52322d33222e411af0160d9f8e1e8e8dd6e70e1d82b89. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB42382756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d7adae0fa4eb722fbe0bf13a0ada830c5624e34a8a848ab49549629e07de3d. 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/QZTBB2448205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed844f524b0780c5d09481e6e0a72b60167a7d214119b678d497822c9ff95db. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:40Z), 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/QZDA82512299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f61143964a94ecf19d2261b218d0b97ce68ed6661be808ebdc18ef41bbe2b9. 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/QZMEN2567859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0daadb9a61b4bb4c2ba7d4783ea2a9e42cd921d00df8c39f6b2fa0cf8a5a16c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:23Z), 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/QZTAU2540934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea354ba4d92b019e5561b56d2b1e432d5e4c3bd6656d239b99590293921eaea. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTBA2545795.