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 0xd798b6234be7e250baefe8a7ee635cb60d203eb732d82a21505942dc10d2c739. 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/ab479a19-fe7d-4d89-9839-f8254ac19566.json and https://artists.proofprofile.net/proofs/artist/ab479a19-fe7d-4d89-9839-f8254ac19566.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 0xb8bd1f27dce5f9a9f1e76423d09999c3472559dc0092dd7d7d468b2f37d7e7ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL1042002502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a6d4bc75cc15dc954eb752cf59a2161437387351c5f1c59b123ea4f9bf6a89. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042002503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709736f4b49d8d94c2c6950e30db9ae40924ec7d8c1a20aa9de8473020ba8745. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1042002504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3920cade1308b3cd1451a92a1f36dbc75bed51e993f903bff6b2bb230e1d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1042002505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704ff696f57dddec653c9593fe34625bd97482318cffc1441936b9a1cc6f7c7e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL1042002507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dfcc4f42466dc7be203306b1dbf6e69ba4d8683f8f65dc93577da2c0e7a021. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042002509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e3d949cf27329ff2f749e8c39874e4f50ce94a9797e6724b931a1914911bbb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL1042002510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5ce522593ec0783e93ade61299374f6610ad60703d3f6fe7c7485cb28ec4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1042002511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449713ba1b6a88bdd5b16905cdb6f885d01013f24ba0a708445b2302349c3104. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL1042002513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9c5b5241ce59dac3d828b538328a8a420a37666a70ed497b7b87c9cab7c579. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1042002514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bd1f27dce5f9a9f1e76423d09999c3472559dc0092dd7d7d468b2f37d7e7ad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL1042002502.