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 0x702ed9bec4e81ee69686217109b2647b8fc18dbfbabe29697caf3a55d8068bdf. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b7991f2-3161-44f4-9a75-fcd9e58760fc.json and https://artists.proofprofile.net/proofs/artist/4b7991f2-3161-44f4-9a75-fcd9e58760fc.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 0x49996fc23298fb925b72c8a242c14ff45b873dfab6d7998d6258d3b1f8b04804. 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/PL3B42300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20ec83a73ccf4989e49e0cad6923e97c201656fb9a12daa41d5101a71ae8ee0. 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/PL3B42300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b2b5c315156b1320e60ff7c94dbc7f54c4a810d2afb255d0ee117981102b8e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/PL3B42300001.
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 0x363ac964075a5075c6c271d509659f910fc1820c83966a602f75ffc87216cd3a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/PL3B42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e859fc32f37cc933def220263f5ead364c2e09f67bc7d13f0c3c42f05814dc3. 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/PL3B42300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b5cdfe591119a0e54ce874ed0fbbcdcb47a607da969452fa211f04bdf159cc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PL3B42300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0226e366f563e209661024ae35cb23c62436d94d6c90844426639bdcb1b063. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PL3B42300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ec31d83cd55198256986ea1d809ec1da3e73806c050a86592ac9ea3837b9b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PL3B42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2c9b923e26436c899fa1b2ce995ff1b0f7cf5d6a25cc680ad50a56c41cc7c. 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/USL4Q2189726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844c5feb1e10341daaa9e1a8d23c4117800686109d054f8af879401a5e081e13. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USL4Q2189727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82ef58dfde9b3491a7143abe2e7a9e7a3c94d2d1a96a87dfe9ed0130d4893e. 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/USL4Q2189728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498719461cdd54eb6480a9f1d651d0f852e5bc3e1790057ced23ca0872ffb2d. 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/USL4Q2189730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443401024fb10666f2ee187f08a555e53976a6cf2cd93b3bc8646ee12de5a32b. 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/USL4Q2189732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8b5d8dc2207506dc0adfcf279117f47bfb9331e94a77ba8294cd479d58bdc2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USL4Q2189731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6af9e377771361c2df5f239ae6c86b2e66fd284c6748e793b283f0f56008c2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USL4Q2189733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2d890dae6f431716133c3156cfb4ce321ef6df09585abf4367acd653266693. 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/PL67G1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7531631d52a5fdc2970c61dcb9480d1b1ae91921201d80d75601e1d61db0fa. 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/PL67G1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde25d866694c82fa063bb00dce469ea1ad3fd26cf6e908d109995c6809c1a8b8. 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/PL67G1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c984006dabbab428e950ec3cfc58a17eae54e27223db1bf3e42e4beb2c08b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PL67G1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237508347f396b6e54d93491de13d6a6a76953e738b615256573e68625d07340. 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/USCGH2111485.