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 0x43caf2d7e9f28d4c142383de6dbaafad0a07664268bdbb5bae47750a6724bab3. 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/ed267d62-b489-4c14-be51-354b3e256cfa.json and https://artists.proofprofile.net/proofs/artist/ed267d62-b489-4c14-be51-354b3e256cfa.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 0x9a9dffce088944e479f7872fee886b7d0bffd68574142933435bbe8073f5dc5b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHNB2122941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97df8f4584ceaedc6fdd70eb06eaf43f082e467d6b1265a6a2a36e33946f09d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWY2116634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3fa824e842c492e2f58a2ba871fccdee33de22df6b82fc6186607190093b68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ72283427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc6655a21744f7345ad3e3fc3ee692fbf363237452d958ed1285a469d78e734. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZHN32260244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c04ac422b22d2e077dd9c9d51575f4629c226bd50559f1c1fe9b426717753c7. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/PLI369466070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e965bcd3435520dc9d4315403838ffd616f72bda914aca9e4e2fc06ebe0ed3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLI362925740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2101153256f419370591b95c5f71495a80e49277aa79f72c10cf45e4ad0eee8b. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/PLI364979880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68610d3811f6bcc07044eda6319c7f8f4125389e189a3956528c844782499b79. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/PLI367001840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6625b05fd5c5fc9416a55cac4e19e44bff846fd219c39123384c8a20d0c93. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLI367001850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1eeb83341fd2af1642cb016efabe71a21f62f28abfdabfe630be01996ef12c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLI367001860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2251f6f4180c1718a0d863a11392380e5bd3404fa25f863b256ecd58df2a3d. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/PLI365348030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d82cf5c5dcad7567f3e7e50898c8d15ea76ae09b83e805be9f56494fceaf18d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLI369511720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562266876187ffcfa7c3de6dd8f28ce9870630837eb63a252a2b856ad3a39b5a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PLI367525630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d82cf5c5dcad7567f3e7e50898c8d15ea76ae09b83e805be9f56494fceaf18d. 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/PLI369511720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174c18f4ebaea79eb1f18668fe979872da395e033d09ae4922986355a7697fe6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLI363644721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c3909277399bc189e9e1a11a77a27a42e37b23af9bf8f9fa88e62c917b06cc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLI363644731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562266876187ffcfa7c3de6dd8f28ce9870630837eb63a252a2b856ad3a39b5a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLI367525630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867f1e9b032d2601498a72f83ac458152f007742abd0c06b85aeb1b2d05684f4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/PLI363644750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ae34e3d44111a50bc5598cfc4680ce81714fefb4f386f33a68dca81dcd74a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLI361668300.