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 0xa0fee8c473bc2af780d78a358dc53e5f6d0c9ae2cc55fc55d50ca55a10b2fb82. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3621dff7-eddc-4047-9aee-ad3e8e969416.json and https://artists.proofprofile.net/proofs/artist/3621dff7-eddc-4047-9aee-ad3e8e969416.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 0xf2d467d7f666de9a0c311c0482d4a6548aced48bcb3963d8188e4be4e987aecd. 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/QZHN52054927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b9712db1c2820c2416902c2228a4bf00d7a87725a95be4178bbb1086ab5da. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6J2124917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82f9afc31db917f3f6c1b3cec77cef9de1220c05dc2d19049da280e4b217ec. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6J2124919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495c24bb6003e6cba71c06cfccf6aa4bf4e48ef82e7dba10d5b98470ba19c1b2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6J2124920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caf99b7a85d2bd41552563f3e6a409d7f8c0a07c71248519210bd142f006884. 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/QZK6Q2076574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709c4bec67f4ec2e6a18ebe374fe3128404dc0b3f8cbdeb81fc2c9169a44f73. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6J2124918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c075e39f13d095425c6f057f05daca8df648dc96b5fbb261207a81d6f6f96b. 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/QZFZ42213785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c9df726e7f7986d29c3cd13ecd7406690e28185f2e599ce12f37e824cb52c3. 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/QZRP52256905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b99dc5c72423625eaa0048bdeafe306b7a9cdff90760fea81d15d5c26c499c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6K2339746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c08dd7302f025161b2604cf1c308a7bf7e1c496c513f280b588acbdb2d01875. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMZ92432756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5c304dbb4e443c361e918146a64afd158368b4f85dc7923451ae66e766e8b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:41:02Z), 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/QZMZ92432758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932fa823aea26414cd354bb4750b2477dd1e7f66d76bb233b1a5366a5a0e4a6f. 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/QZMZ92432759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35305bec642a55495a5c988cc3ca0901619e632dafb54fdac304884b7d3466c6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMZ92432761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4fa1892f52e613f726939217b33966c50e00cef7885b4bd4bbb5d9ff716c0c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMZ92432764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d782b324a14ee45701bec860d80db785e4e5b0e0ef53c21b1ece8a02f09860. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/USUYG1705337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331680eb975ea6304a0128872461b3c3766e7761eeac5d81b4667891809d67bf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:59Z), 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/QZNJX2557777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc82f9afc31db917f3f6c1b3cec77cef9de1220c05dc2d19049da280e4b217ec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:46Z), 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/QZK6J2124919.