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 0xe6378d1cfa50ba95b732eb26c1b0bf71810fb53d3cd447b74728c94450f6caf5. 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/546e8db4-3050-468d-8bc8-c3a649c5407f.json and https://artists.proofprofile.net/proofs/artist/546e8db4-3050-468d-8bc8-c3a649c5407f.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 0xa0d27cf389d4a11ea31bd9c71d2adb724710bf51a50756a6e772d28f3a4716e7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RSA3U2300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57537ee921899de620a9746861228da111c9a4c41e49e9279d875571c7656503. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/RSA3U2300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f76b32ffad8c72186e12010ea0b4f99a33fe2f09d12c3a3bfb3dcafc2e4a1e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR96X2515949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfab3513873e3ecadc05d1d7634a6645f3b01b5a92287c446accb7209dd257b9. 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/FR96X2515950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c5859860f3472a88ec08f32edc2c70d41f3ee1ddc62525ef37a806a0452f16. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR96X2515951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb370dc50c41bbe85990e34fefbc931bdf9326c848e545d9f91a59e230517d0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR96X2515952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1efe3d46508f63c344d2746545af11dc707f37c66f8b539e01ec6c471ee38c. 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/FR96X2515953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda25582d38a7be849c823154b30ba20f2a9346c89b026c03808cff5bf10389c3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR96X2515954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613bc5e2d720d5835204719a9000db708ba0dcbba5f94a1d2fd50d03fa1b16cd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR96X2515955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1871bf6d79974aa4294864dd2854ec8c89ab53a41e1e64c4ec3cbfe7833c971a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR96X2515956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac0bad4ae7e9284221d6750c6993f6b53e784e88ca01df4fefb3e829fcf5343. 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/FR96X2515957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3c401391156171d4497d173c8d22d15c1a8fc50cb2b78b9e2cd074e3b0f2b9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR96X2515958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98099efccdc886c053d4d9272279b48618013d94e0534c2bf8d52e69c2ecf4fc. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FR96X2515959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a9e5b0fe0cab5dc1bb0c59fc16c8d9ac4bfaa68ba1b651e9368422254425d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR96X2515960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008cd1271a9f4535eda1b03460d556201723c2b6a6e3cb83108763fc4ee62fb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR96X2515961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca80c19a9d091e6202b81a950a00f2a1b90810fe3e3348646d415850998e97e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR96X2515964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff521b2c1d94dafb7198e6c41b64adb6dc9835b258b89bf0fa7f93f86373125b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/HRA102510916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a98ec4420647f22f612a348b7c18f4df46457dfc23bd77c0f344c95b42143fd. 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/HRAA40800072.