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 0x891a8893a73641b4849444a1d3bcf95bf051bef1034e29dd7ea53750245bc558. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b03966c6-70b2-4032-8dcb-ba1631d5ed48.json and https://artists.proofprofile.net/proofs/artist/b03966c6-70b2-4032-8dcb-ba1631d5ed48.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 0x4591d7150bfc3baa493ed51ba9cf5b2abda989fd308e4b8ce8d8736e6a9668fa. 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/BRQD22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6816d1c968d4fbc811d280c73c190563e69cfd640511f2a13445c5f46238b. 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/BRQD22100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe692b797b43df845a8f084f8c3dabcbef58c59dbeb8ad37b141bd0cd902d9579. 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/BRQD22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f968bea2a2739dcabc7f582964eb7ae9fa311aa1b4dc78d7a7d6660ed9195f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/BRQD22100002.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac5ca895f1fed91770d4efacd78c99d7cf9362f6d6c17128724e064f5c15642. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRQD22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3cef5889a6d8dc656e1ced2c27d7fb0f07d63b650177ea99061384d0a02917. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRQD22100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aaa138519c08bafabfde0be64e4b15a2e41fb875a3a8cc6b99198ef62e6a3c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRQD22100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7e094eadc5a7ae86c7e7ec2c7db67f261092d13e510515b21798f646447d98. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRQD22100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c066fb543596913600d86e22afe5ebda153e07402d1d4660d802666298a2b4. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BRQD22100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3fc1a80e4c9eaa7c5596e919ba3b16f470728cea9b897b6b8a60ea8ad469fa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRQD22100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615762503ab93a401c0a1162bb63049708561c0d976e7c311cc962d1285e7dc2. 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/BXM1Q2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c38737b426051bc774d2d67d67bcd4d70868ac370c5e67471885c02afb51c0. 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/BRLPA1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9108b7df73a9f7575349c58379e9e8713c17b88a13f987652d8ac1570ef8d9b. 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/BRLPA1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d8209313c5fceeaef50e018f1066b30875017b6a284559c3d596074472004b. 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/BRLPA1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54662344f80d4ce8c96b35f67710bdf4f4974c52627a008a0852a238775f841b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRLPA1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f4c45b2f0715118a554a2e24d5ce277f3c6e9a0df711ca0a7284cbde8035a4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRLPA1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c320124f988db179854117f7a94d4d168b3523eacb9c72ced2c1a9da3485e85. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRLPA1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e2ad342cd80b204c589761bb12f7cadeb1e713b9c6c4862bd240320784f7e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BRLPA1300009.