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 0x913ed0a661acb64a25b0d096b060f1d9d0caea88247d0811d11ba6b82934fb6e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3934e7d-226e-4134-8976-1993278182a9.json and https://artists.proofprofile.net/proofs/artist/c3934e7d-226e-4134-8976-1993278182a9.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 0x3bebd1554c1654266271aac598e74aa7b82a66f3ec28a89023be17f6dd600a92. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:46:32Z), 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/US83Z2108934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e022f41a6ef4c91b4e4406cb2dd82631a66e859b16c85c56112b2e59ebebef4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US83Z2144841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896df512ae13f4d2b4e7afebefdcc9fadc5d39546370250bba6bd3f2d9f1a36. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:06Z), 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/US83Z2225471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64421b8bbb5f2574058c678303f8aedc624645c308f69d5f67fe12fbf4ba88fd. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:27Z), 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/US83Z2237532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0a8320a098437f19c257e9055107adfef0dbd0e7e977b191e52e0883608715. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:18Z), 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/US83Z2314990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f965ff508c1e3c8bfbff643b14fa6e9e072dd7fd7903a5a9a5589153b8738a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TX2445519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2ef217dce40ff72dff113f62ee310d21db06ee0e1a6906ba60f1d8b6c53d2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US83Z2402953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75400806440944290b474ff21b91c07e30d637c3d98a48d9d62868f90d33c9d. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/US83Z2503643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b3a55ead54c5fec396b59aa810672a0a8ea9e0759f0ab73549a27cca040a0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/US83Z2526835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b8fbb0c69046cd312a8648f6937268911c793fa4cde6fc579950fb5680318. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GXBNP2510511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf8e6d685fbb128a38de4468824c234e2f550e5901d19f5f8cbeaf87359f1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US83Z2130122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099a29c4bea818be444d464b2d0b8362380ccbf118c9946042fe5fe100598f9. 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/DEH742441564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf542a05c4a9bcce2bbfc2b610a6e100a7acd6139c6dd4304ff9719dd85ff9790. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEH742441566.
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 0x2fa70115c9084b201c57a1128fa6d6db75315bfc3120058ad9ccb3221f8eacd6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US83Z2402952.