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 0x6f7ceff055c4d0c6ea38186b0af0efba71c723a50f7cd3ce5b8ab5aa5acd2307. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d6a7ebe-24b7-4823-bb98-918422fed66a.json and https://artists.proofprofile.net/proofs/artist/9d6a7ebe-24b7-4823-bb98-918422fed66a.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 0x8c2ea4d150c5bab8e45628ace5c0bc126f6cc539dfabe24e2a486aede99e6cff. 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/US92U1901079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc411585454b0f6ff548c3d47e4dd3f1a4efc80528191744132530d279027c0cb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US6680917539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c64d1bdd14f4d0e8bc5ab03153d05808ed744590af05503ea7721feabb7d2. 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/US92U1903590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587e625fe73a5227cd99fa0f57ac5799268886bd95af3914117265e9ea9ef53. 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/US6680917672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587e625fe73a5227cd99fa0f57ac5799268886bd95af3914117265e9ea9ef53. 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/US6680917672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d6d8f119807fa295ba6f07fbc9e032b0f6ea9da9d308015bd0256fc9eefae3. 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/US6680917673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300ef4aeca986d31a1c9c2383f1c09ec5f00e6499ecbe3a8161e5787c35c9841. 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/US6680917674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c64d1bdd14f4d0e8bc5ab03153d05808ed744590af05503ea7721feabb7d2. 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/US92U1903590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ace89b257e762764c14860c630ab9bbbbdeb51ab2153e886682454940b3f38. 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/US6680917676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ec80e6785ea82fd3be4511bc9fbf7f4fd58562a2dd2e568666372df04da119. 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/US6680917677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc411585454b0f6ff548c3d47e4dd3f1a4efc80528191744132530d279027c0cb. 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/US6680917539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf911cee95a1221486bbadbbceeb0d622fcd713fe2ef9c9dc56d758f2272a4f75. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US6680917679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe50c5a21b7ab001706e80070881a8d96048151db9c251bc5da01aecd88907ba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US6680917680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8e0eff41072889fc433874041327aae82f47431eaf5816ff8dd6b0b0d58bf. 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/US6680917681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944d8bddaaddfd969d6528ddbb448dca97f321301f24e63d2acf4ef9c61edfa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US6680917682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473401242b9869f3c642e867cf8e270eabf8d4713f81464ff357a3b113ec73c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US6680917683.