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 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 0xcc337ed36b6f796f47cac4ea806071c92f8cc3f6e57cba3aabd5e0003ea87ee3. 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/fe985064-63b3-4b3b-8aa6-5f997c87888a.json and https://artists.proofprofile.net/proofs/artist/fe985064-63b3-4b3b-8aa6-5f997c87888a.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 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 0x3b1fc36c55d65ea6e6a81452973b363287b738f6effb750efc168cb0e9306bc8. 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/NGA351700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e398dedf0cb032bd5623fca1fd3a69d7c1d176edc1c0299d36e3ebbcecb93d. 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/NGA351700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc67f46da7a7bfc3c90f344ec008c258456b573fa5bea1601f2facb0db57041d. 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/NGA351700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd608ce4aaeccc20ae1fdd0cda6e8b06bb9a953efdecc0bb2e3acbb1bbb48169c. 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/NGA351700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad8069a030140173a3283dd33e600aaaa50ba277987bec8db67e28c323c80e9. 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/NGA351700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bf3c59eb44ac02010381063127d8ffc29b878206c60c5c676c6174e2ab54c7. 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/NGA351700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779485f0605ce62f56f447c523108e34e5c1cca18c8c22c119c524adbd2e16b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NGA351700064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262540676964063126ca422ad0449a266d6310a3d269adf062ce0846eb96498b. 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/QZDA82008378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77397b889ab34b139cf37a3d74a9fb05832d6ca54e4eb53c4c40b45b9833fc05. 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/NGA351700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc48bc6bdf55eb79577d732985417c68bd3e8705ea248104d996503f9b239410. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:09Z), 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/NGA351700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fed258f6fb670f9989a5a944213bfc8564bc1162a1fd341a2c4877d7178d5a. 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/NGA351700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6890ecb9f6f57aa515969e7c1e8cf42a75c563d988f49632bff086c935ca360b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22372425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefda6adf59c29982597bcb935e25f93151125b66d7f13f102e88e093031eead. 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/QZK6H2077059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d9e28e706e8387b11667006bd76123778149e00341009790d6af9b30e4791. 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/QZHNC1964870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd43210f5a4825ed18ae746fc46531fe0902a00341362d3b9eacc68d5f09980b. 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/QZNWS2004560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1211176d0d654f6f293894a5b67c710a8f00ecaffcc97458e20a2157cd82377d. 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/QZHN72074295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b680c4e9cd61f211581e7ab1f5d005ac212439ec37d205ab6bcbdac2ff22d. 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/USHM92081673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b088b88e538982fec1166ff34f86db63b98e3c50fba7fe3c2b71e9ccd02070. 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/QZDA72174111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57852ebef6fadb1811b78155c910a6344d88e39e9560684eef194999871d25b2. 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/USCGJ1895938.