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 0x41aa151860d940670eef5867c005f0df7ee63887b9cfac02ff2bc2013d8ef5c0. 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/f04b8bad-51de-4024-afbf-3dd95acb2e08.json and https://artists.proofprofile.net/proofs/artist/f04b8bad-51de-4024-afbf-3dd95acb2e08.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 0x0ebec69d9701eea9f4bc3154922c3fe09233140baed120e5b5bfe4aff73b8b9c. 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/QZNJX2341996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5b859166bf45c3c7fb8a5f5b091815cfb3b10981696729a38cf601d0e76214. 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/QZNJX2341997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d1c0446928b50d8da42778cee919d8034d17749b27083d8539cedd5b2a4d3a. 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/QZNJW2325120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd064ecae20ae43bbaa39da35280c2be794e3777c599dfa8173ae4b7cb448c6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2342000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390270faeda43d1bad21de18764eb2182628e8649eeef94e595e16a1cf91b6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92325064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda78d15cefb64606b6767ce1ceeb160acffbb161dace03e46a917e87c087c637. 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/QZTPX2381222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d1c0446928b50d8da42778cee919d8034d17749b27083d8539cedd5b2a4d3a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZNJW2325120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390270faeda43d1bad21de18764eb2182628e8649eeef94e595e16a1cf91b6f. 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/QZMZ92325064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18328d5c7276e86868f3c32a1942e51c5962a86e8982cbe4a7b2280d3b672685. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:51Z), 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/QZ5AB2387187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4e3f2426088a1e6bc27358c166c07e904b3f0961f9c4e26226afe651b0102. 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/QMDA72288910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d0d9d93c608beb76f71f8b78c5004a1a7bdf1bf72fe631f95da271184625db. 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/QZW9K2295570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1420242d26473896e752a9f25ff8e1ea998848de62ba5a7f1ad01c9c708d5745. 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/QZW9K2226358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25e2f636349411195a0a9a85400aadd9d8ce731c4ca605d0fd4ae5be26cf931. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJZ2299909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb005103987ca1d08b01a11dc2e69ce944d32511cb788e562db6af4257593ea6c. 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/QZNJY2266143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a94871bf92b2c7ace7a4e698f0c11ccb209347d7f663d92d43bc8be95db6b80. 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/SE5752202891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc365bcf73eae3f944f7b1ac4782bdb1edcc50b9aad1aaa7cfc8a1edeb6ac3fa. 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/SE6XX2126429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9794a02e973fcddf41ed4044e7fbe177c471e9b8adfbc007592fde1ffc2703ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA72144642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23305f4bae9c192c7f61692e046f64528d7401ec9e26eb6feac2978dddc11edf. 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/QMDA62164220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917fc66c48bebb106e729b4b029374069f74e557c7615eb2fafd449368375800. 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/CAGOO2144527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e894862a2e3c23afd99eb538c91fc5608ce7be54ea8458c1e4b6bf67112504. 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/QMFME2173044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fa2adae49409e1083cea8b4983109ec8b11e76e28cfabbe063f2ed1088410. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ52152721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae5649f8488f1f86660b7d9e34d402ea0a0ff27953e5c60afeb5cca65e6bb12. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6MZ2168193.