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 0x187f822dfb363b188d0b120d3c7bdb601e7794472e7eb8baf6b7927050b1fa39. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eeee5e8-bccb-41a5-845f-f0a6fc70830d.json and https://artists.proofprofile.net/proofs/artist/0eeee5e8-bccb-41a5-845f-f0a6fc70830d.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 0xaf3a35ad1018dc6069dfa03d2db1b63b09a64faf6277309cbc1badc31c6eca90. 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/CH7811708965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c2402bc6f84faa4436fb28153e82868295733528f5b588177f3bbaf3279c2c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH7811708964.
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 0x6469f83a4bd660a8dbc77e7dd41c8aab4af77422c6175c46578d565e87ae739a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CH0801650802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b7fecd8c86f13a9c58370c7d7bcae2a77977a7c4f16c40fc95007c5c401aa5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH0801650803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d32b323afbb3706bf6c0f534a7a5e31ece5660a37ad5b0ec64de6be0e60a6c. 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/CH0801650804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a908107e61b89fede391e3659fa7953c303b3b9b071665e8158cfb4a26326. 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/CH0801650805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cece51ada98294758693c893f7b0a2a19709464fe6d1832a2774ca922bc0531. 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/CH0801650808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea98398f8cb914200562e4ab0610fa468f76d5f023b78191125fcba4b166a1. 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/CH0801650809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c2a2255d0b7284c5164a5f7d92893537046ab8d9aa48a2291a38c62d715bed. 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/CH0801650814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5716903fcb8b8a76f1188390f08132f512fdf7cb5710d8015ad3eefc399ba13. 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/CH0801650816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7509c00d5e53dbbc002f6d7d49a4f05827a2d205edba7e174317462d4894f6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:05:40Z), 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/CH0801650811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee1de1ff65eb6040f07f84c23214e237a075c64cd14a74525746082b0a596e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH0801650801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5060bad8a0731c3a3371d645b18fc05d7de6f5f8c2d5840585edb336e3572adc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH0801650806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d36bb31ed8cdc8cbed6e6af4b0fd9c81e7ae433542bf1ee6b5d564923b39a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH0801650807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4cd007a2b1fe5df90edab305f4788c09538dcb15dd78ae07719e56ebda3e67. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CH0801650810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e1020779075f5b284e0a817d75ea324dfa1f4faf77148722fb86877440202. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH0801650812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c20bbc5c8ffedf822e76becf434fc93d496a238418250ad80c1ca088fe5443. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH0801650813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa6833f20a0258ab2d9db82fe84b2fe01d5bbe0f6f88310aba3be14ad75376a. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/CH0801650815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58e4c6ac0893363e9e4774981bd126d1f0de094528c2381f9e7032708093126. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH0801650817.