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 0x8dc753742c3884473375364c8091e067f908144b6f68bcd81d27e37e6e0950bc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bfc5dbb-fdf1-436e-968c-debddcc4ea70.json and https://artists.proofprofile.net/proofs/artist/5bfc5dbb-fdf1-436e-968c-debddcc4ea70.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 0x0512db850ee51a71147dac6f1b413dda1f19828d9f4a25834677b43147a163ba. 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/QZES72272575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2753f0578cb54c25a17444c3ac92481eefc768527ade3850ffd6f23d2b1f43. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZES72272576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2583914368c11e64dabd6879444f92cc0e67e340f623e5093397b21d9887a593. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES72272577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad7691742417b9028987fedaf014489119593b840d54e8818e18715ecbb8c4. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:01Z), 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/QZES72272578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30e6f6d1461bb19e040cdb6d9fd1871141b094025e0982c96138416e3638819. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES72272579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948f4ef1ed99c1c51b20a7dbbfad25c97e9b3a6c5eaf1cbe7d928f256c1ad2b1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:35:25Z), 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/QZES72272580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f37960bca6ef2ebdd1d23cadbe92fd4a4f0578391c8ef4b813d11a5696f5ed. 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/QZS672230583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d66a28b63d5c909b4a5bf75730cbeb9964fca4c64a974f39e41834cddd96c1e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6L2248021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa440aa13a4c1be23202fd91fc6a95d381b4e00175179297403574b9493c1fb7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZMEN2290753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8e0e275b041e9771cf3e1702a1aee4fd2464be3d642104d73bac1fcda7ae11. 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/QZMEV2326433.