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 0x07c26fa25925421975b90ab565eafbd9089723d6e2d7fb5dbdb43c9c9fee6a75. 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/5d567e37-ee09-4339-83ff-2fbfe85667cb.json and https://artists.proofprofile.net/proofs/artist/5d567e37-ee09-4339-83ff-2fbfe85667cb.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 0x7902a2b5bb53c59fc52763c79b094d49fd3ee56334494086cd2d0dd3b07d665a. 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/CA6D22400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd96751369944af66d4c64c6b7258a3e85f2c4b434cbe019ce19bf27636704. 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/CA5KR2437475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f320da28f47a99a3bdd0f0490e441d1ce0e5cca64548bac8cc7ab690a575c8. 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/CA5KR2417166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005fb8671cbbe7900c39083501aac7bcab352fe442a84fed196a7e207f3981a. 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/CA5KR2415280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c00e7721903379778a0df55ce11d5e53bde91d71d05081d13fd1a71bce9cdf. 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/GX4Y82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef354e6f7c34b33e16b7b182f8468b3489f477f2b8e3dcffc0b6fb12eb0d5b6. 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/GBUM92000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd87fc8588ba95e4e6c06b8939216b5d2b3670ac2cfd33a45905b18cdf64481. 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/QZWDE2313320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8b73a2d50c775bec3ff5ff37f6df65bcd40da0c3355a1d066d7e1ad12caeec. 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/CA5KR2363172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5d1eb84609dc7bc60f8a461c96ff4f9fbcf5f363e483232fe14960662fb6a. 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/USDM32353405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38619948f01865d5e7cab1f5587dd126b1f9a1bc91df7f9f92a5eaa756c190d6. 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/CA5KR2365703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b653f97dc74aed99bee2c1b02444fba0564c801d08f255d5bbfafc5fbda9709. 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/CA5KR2365705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131e525c57eed9c7dcb4e56e65401611d216dd1892cb7c4ed3be4b79f4950faa. 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/CA5KR2365706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d99f88ab1f934d258a01838e484aaf8ed9cdd72c8e7c85c77ae201e3a8b01. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:05Z), 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/CA5KR2365704.
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 0x4c5a010cbd8bc9de05a26b122160880252d62a8946cd4d62514a1d2fbe4ea138. 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/USLZJ2367376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2a3a25bfd7351d76b12319894fee7374e689d363f4761cd7e2c0eb100da19b. 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/CA5KR2296916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377484f9da3742905114e65d35ee3dd8daed0f900a73b42e32becd9348035ffc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2296917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b098cb9a524f257e846fce35c8bf4ce9c31b5a8ab4432971bdbda8c7eb31e5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CA5KR2296918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679511f9f12ca077b5379d79f2bdfd10ed671fc702208badaa263c026b2010ba. 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/GBRKQ2212258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0991d534bb677f80707b5febec98acdeff7b5fe4fa6acdd57edebde0ed05d1e2. 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/QZMHK2226435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8c6c465de86da97374fb2a9a1248d4986415ad5a394ad2b388e662de9cb96. 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/BEN582100888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63be0cdc0c352cb9dfb4cf456be97606275d6cf2e443e81b03bceff9e62b93a. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/BEN582100890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b894bde9e7776e2299ffcf56432a5a9907b0c652f0446184df8cecb7e22f7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2160472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f05d963751bdee4355cb857578774a6bc22730825a0a2d568c897047f8faf16. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR2160473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d5d9fde9b98c43e2eeeaecd09dad0fe76cb9ae03dcebe4ff8299d38f47ad14. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CA5KR2160474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1f53d6f2a738cf5468f9075c8e57922aa1bdb469806a78af0a43db7b9cf19b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR2160475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c719f6a803325d06bd12dcd999a2eef66bf9ab30795dc3e3cd6fc3aa85db2. 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/QZKDK2119484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04582188422878ef909632a9dd950820c2febee8a5de49852959f1d8be513890. 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/USANG2131617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a2f42665771b737cd4f6877d53c22a16e6661b63087efa530a5fec64d1d8cf. 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/QM24S2010488.