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 0x7e2a96f8b5621f0547ff42d3cb8e2174b6581c7b9ea433d3adc692469918d7da. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c4e8f8f-7e65-4599-8156-f2c2ef0b036e.json and https://artists.proofprofile.net/proofs/artist/4c4e8f8f-7e65-4599-8156-f2c2ef0b036e.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 0x2f4259ffa7c955885c654a1aff17de63d7eaf93053ec4db3b382429b7a7c9bd2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMHL2499179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223ac837725905c70303d696d34a9413869435ba0d54f4e7078a90b7aaa43b91. 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/QZMHP2416905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a1f5c848d1ce95f33ae616f37ee6d25da14302e3f042b3ac96b34a3957de9. 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/QZMHK2483803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79865e7e515b988cc298b26e17ebbd90456b2191a296e274cc968acdaa670d2a. 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/QZMHM2480278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2e8430d93a330dc98f967e9f6ef5b65cd137b12c3e69a6db7f6d9f88cd48f0. 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/QZMHM2408795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a30b0a2cbddf4812b9a0474801598f7eb3636bb0e4a1943215f49d565d709. 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/QZMHP2413892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d805b5a2514e668445f3b87715bfd3d8b150cfbd5f4ec0f28036e8210747767. 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/QZS642483384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21ce1935e31bccff78f5ce54a35db22c77c059fa4de11482613df88e9c0e4f4. 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/QZMHN2468448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca576ea6be6b8e3ee42988351cb27b8dd0e010e6536728a7aab27d95986e2b3. 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/QZMHL2426795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90410620598d0c2e4f3a23122e1a8b246d6fc302f77fef36c85c8de424fecf7. 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/QZMHP2439470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d32cd98074facd6bb7dbbe665e191823b5ea326db99d10b5a7e4a71ceec89. 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/SE6I32474208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779456a459b17392a82f4ae6674507b008f055b18b525facacabc149fb1ca46b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32474211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372c86152923be7e1fe045acf1b3877ebbece7712650f20f67005d564086ee18. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32474212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed9c78b067a15676b794ecb35584e5b1cab6eb6c9538b60b2c01d08c88cffa. 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/SE6I32474215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392a1943a4cde3be14b1372e7a68b7ca3f4b0a419422e21c546953d8951f31d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5752442757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ede7d8b9a9b53a05b15fce2406ee5528d48af07e1e7e93a0bec05c62852dc1. 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/QZK6J2440841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb889660dbd6caa0d13130bfeeba6555f14d893967b79caff69208330b2d8de6. 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/QZK6J2440842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a0ac10e106e2ecacbf6d15b7e14cc76dc1a5cc67010fb3e012654feb737ff2. 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/QZK6J2440843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb99c87a5c8a5e76373709c5a2c8ff9a1941ac4e14f2a482ed13e0d59f4708c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTBA2475850.