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 0x72c4ebcc567fe9be255465a6ede4490b416e0f459d74ac9afb78d9799a9f0ae5. 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/12e1169b-7bf6-4106-8d2c-1707c83f194b.json and https://artists.proofprofile.net/proofs/artist/12e1169b-7bf6-4106-8d2c-1707c83f194b.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 0x22c0b7bee02a9ebf80a8757281a2fdfffc1a36a29a6d8f40e02a04d84d493331. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/USSM10905323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cd5e214e933895cdc78d77fa4d81d1b71caee41446f9dbc51bf62a32971b03. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USSM10905325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc29d6411041cb53fc92b6ae24fbbcd88389742527d8ea82194e3a89b087b8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USSM10905327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8f0dec28be51d4effc9bf5fcef87af80f3da871063c6a113c389dca2a5ff8c. 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/USSM10905328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f50d4b439e708d1095a07cb60f45e798a3bf13fee52dd266ea81b409d7eba1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USSM10905330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3dff55bf959904ca14780be4d88b8f688465a350340d3c9afaf74619005bed. 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/USSM10905331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c9590d27d85319a9823816e996e7db81c71e79edb41aac509765370c2db675. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USSM10905461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7615fbd1dc403eb443371884ab12673bcecd662fc8162a6e37833da2479c08db. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USSM10211668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3813337fc38c7ab8392cb90cefe401b9af0517bd6c007523bc28236624f13d. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USSM10211669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ede37b7ee0e972fd789542a1a0c838934e770bf33a85b95d93e3490ffe502c1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USSM10211670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc4be1c20250c277af00e2127602b234109d4da1742164e3a4515ce16495fb7. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USSM10211672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcef2a5e73f746548984cc757cffb71e653063f0e2c65daef89f1e1a1f7cf47. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USSM10211674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be12b14ead5f170042f9d06fccd76c54b2ee497afe8c831f4b3be53a56fcda. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USSM10211676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9d5bd8983420693815e629b19c659129cced624da561ed21fe59bae2af5be. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USSM10211679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52bf40fd6bdf0db00ca058310b0bebc07217a08b736837d1715b9db31c15cc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA560619536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3645b1c920d1dfed90a726505c7375fb73f1dc9cbf4ac70c612cca940ce6e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAJN2512398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e59ab98e2faf56eaff43c0294e8afbd02ddd108e623ada466108d44107629b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMFME1305168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9d5bd8983420693815e629b19c659129cced624da561ed21fe59bae2af5be. 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/USSM10211679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffbd623b65d807d813d36ea3f23fd3759acf127d6d464579684fea62ad0cc4. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USA370505958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc2429be8df1cbe2479e75ef025ab6b8512e6dbc75e78988252b4bab08bcad9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA560958583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b45f97179c5ae6c86704d43ff5ec070c54610468c9841540b6a6c5e7d722c6. 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/QMFME1334541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4a60f963fbf6d66f45add815692080313041932ef46a1cda5c63728dbf64f. 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/USA371178075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf827550c9ade5acff3e8680e7936c8e1a31183a22defcab8beade83844261122. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USA560871368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adeef030a246750aa32d84c3ee1806179d60a179b2849d4d6c91b3dca297dbd. 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/USA560726367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a192bb6d6cf495ff96568af1a88ab0146ae4ca7637330e301744c7109d1e91. 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/USA560649487.