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 0x8cdc3de07544cbacc743464ed92f8ab19e866d5d95f27885fe6a3ba2e36adaa6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6764a6f-d817-44bf-82b4-8ef9f12e06c4.json and https://artists.proofprofile.net/proofs/artist/a6764a6f-d817-44bf-82b4-8ef9f12e06c4.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 0x212bf18f4493bd908d2c64e0d941b7b2670aaa4d034b320f4d2e3e3e0b7ede64. 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/NLRD52017988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d4c6356506810cc9769fd3ec7bf7a6c862c242363ead3d5492a8f57ee5654. 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/QZHN32035509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617d19624ed659eb1d16672e85d39797bf2283dfd81b768511521447688bdb8. 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/NLRD52017989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f50d5b7d978c7f34bf2a6c152d37929b27e1dd56d72e72d08077e6cd13dcd2. 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/NLRD52010190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5c73c4c8704aa14c3cee82d7a43af1dc8c5b34510871fa02162a863b85db8. 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/NLRD52017990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb9fe6fcdec4b67ab69b99a14cacd7126fb2a6baca459a406df790fc7e98880. 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/NLRD52017991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a57c219fc12b0274c3f8774232afaa84827d9fc3a0dd862448fecd384bdba5e. 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/NLRD52017992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dd476fb9af18af71f6eaffe2518e7189d095b6faece88da5eec6c38c594238. 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/NLRD52017993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c382ea6e1c1141d7a31e42a892e7ef474deeeed8996b25af56381608aaf70. 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/NLRD52017996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f50d5b7d978c7f34bf2a6c152d37929b27e1dd56d72e72d08077e6cd13dcd2. 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/NLRD52010190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d4c6356506810cc9769fd3ec7bf7a6c862c242363ead3d5492a8f57ee5654. 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/QZHN32035509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f35fba7bb136dcabaa699df263db28b4ab49ac4a15b440b0064125ab105b29. 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/QZK6Q1959736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b4eadd1ae6b3ab71a34f7ea737f82a9c1a122f43522cfeb5460593f166df61. 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/QZK6Q1959737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a035efa255149a5ba3f67e6c4975f1d7942054f260ab1ba7573c6d68c9e32. 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/QZK6Q1959738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf29f98d355ad015aba374cf9b2f5c67d00430f3e40c7689cc32a77a6a0e780. 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/QZK6Q1959739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19806dc883e7a6c6af33e31ba3e056bf636c5d3f2b3e9bb2d016a289c0c721b5. 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/QZK6Q1959741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c612ec3fe32c484fc4998d231065d9b2881da09e7343ac0fd3a49ed080aee68. 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/QZFZ21923482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c07a41cd5b2bc6e7fbe874792b803745a528baa213bfd028eb03d97e1ddf199. 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/NLRD52010196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bd57a9838b6836c6230d8414d02a2b2dc120b6fcc5e347700314e7b1d5628. 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/NLRD52017015.