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 0x099f3e7e7b734fc2fa073a312e80122fb3bf4cdb6590968c7fd75eb7d28d7818. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3604a6da-a912-42a9-bf94-62ed613b56b3.json and https://artists.proofprofile.net/proofs/artist/3604a6da-a912-42a9-bf94-62ed613b56b3.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 0xbe8143585142b6e5003fc7bb506ae971a136149c61a6044bdddd7915c85e6f83. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1876371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e22bc4ce09867c32372d4e8cc71bab3ee069699bcbb8db2bfb91673290647d. 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/CA5KR1933972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eb184d6066c88d95f70142e1ded91e6f89e456d975ab13bbe2348bf44de97a. 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/QM42K1835020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933d82a6fbbb5abc379aa1a72e4eba659ca5588bf822b61f41ae4e0839e4597e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K1898319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a1c963d877bac9f2346f1eb0c58f8b82318eb423e445a4ac7ce77726a5628. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1888458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464710b1f861d139a720bac3058a928255f72547de7da1849ccd5f43f6b338eb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1894574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1cb59aa5f45bfc26d9bfd4b0d938b8b4c3084a7b399f45b6a12e8adca5da25. 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/QM42K1879178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37929189a3ebb4003864485886c29db4f6d83579cdcaeaf23605f21e1ac4990e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1847068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381eded9df9af731d1fb0109a8107956c08914beec421359b53f6d5e35a84dec. 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/QM42K1839013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6e237bc87d94dc700aecfcdb79bf827f8fb2130c659b697a3ef7999093a65. 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/QM42K2016952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5455e47ed374d3fec98a6ac10b2df9882d789863176b3565f851b051baa815. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K1858239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddf4cf4fc86e51237c8185c56e4da86ef2b89b19deed47f5642aa6ead4573e1. 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/QM3L51500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e0d69d182e3613fdea5e480eda330e2821d9ef609c9544d2d3687660665f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM3L51500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb170a985099efa0647d8c9e75463f51d74b07801b13d329e153793160aeb66. 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/QM3L51500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee15e17bdb18a98590c85841ca1b75f1e831d6c8873341c1623a19b94bbc703. 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/QM3L51500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb170a985099efa0647d8c9e75463f51d74b07801b13d329e153793160aeb66. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM3L51500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06777e94530874a375cf0814a679ba26516ecca6fbda1ed5142ad3255240b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1800549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ec7fb4e9a80db89658125ed402f270d29c82d1efef0c02f064a9f16eb85791. 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/QM42K1801463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2a85cf474c5cd211fcd336a5542544f0858720dabfbbd5f6a024cccf148436. 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/QM42K1857018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d5013eda460c1d94bc37cc6b51898120ecba9c33b4e9b83c6bd0a4746d152. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USLZJ1825316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d70b1aebffef852aee050637208fc53acea6c167d36c362fab070728801d98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBWUL1812058.