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 0xf789d5e1a42d72aeca734f8440624df75ec70ccff99943deb24ce1ac74f89a98. 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/de77ce6b-c6d2-48d9-b91f-97e7de9b606f.json and https://artists.proofprofile.net/proofs/artist/de77ce6b-c6d2-48d9-b91f-97e7de9b606f.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 0xa9b2411da6e8cc0ab207a6bebffa90fbdb1226ef81f3de61a7af5170d4ef6b23. 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/DGA0R2341237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d69efa468c24e467a13ffa09ec3532153413905ab4fc53eee95c7ba3d74539. 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/DGA0R2341239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fbbb690595d5083fc62e114668f62bcb7af5892f1037d5bffdaa77ef5898fa. 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/DGA0R2341240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b445e8b74c89f2978dd6751660d37eabe630d091c47ba545e4b8cce84d471. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA0R2341241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d3817b353f53a9a82929ee871cf21d5cecaafe1ebabcc66d315f3b8f0ec0a0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA0R2341243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb3fe270256ce1f9dca2a13e51599451c863b53c008fcb7665be010e00926c4. 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/DGA0R2341244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6854f5e6329bc3a827db9310ec8ac1882f9164eafbfd785b0a623a1c557203e. 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/DGA0R2341245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa600a5ab7e62d71c3f27e11be3ee9271690c98b940c85829954795bbb85ec3ec. 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/DGA0R2341247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b06066ca56482a6c41ebc64fd2f2b3b4008d33eabc0c14bc779d2f637a02a24. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0R2341249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a51cf1a26a3d3c522a28bdfd4a7bae3b4352660cb2667fe2f5a8bb2b99409a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2341251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf2e87dbfbb7e3ef9bc44ffdf010a6d343740153ea18a65ae09111034494430. 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/DGA0R2341252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e4e610d637dda74653d1e6e7e982ccd8fbf929c3f1c11aef0c754ac20ce015. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0R2341253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dea3817b397cefd09738155cbd5ab4d5330972e78f7d3e071cd19768d4a887f. 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/DGA0R2341255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb48d48a7153f84c99dba8c7ecc23c900aead102abfdee0a185b7c833006827. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0R2341238.
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 0xa32fe74496f04c050ea024c912e27c6c2cc96e572d3c27c748cb1659c5f48835. 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/DGA0M2426747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f563de7a71b130887b9c92fd3a9a299b72a2eeae5f59320a09a32812b66ea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR96X2400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb4be1f85991496fde2acc49857af85ce4a0bce5a63b1bf4753eb45c534d849. 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/FRX872309708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97461bd6162fba0e3f26ba5f27be98316b78aaa6a09af0f7e20d8c0f9a9933e3. 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/FRX872309709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12191ffee5f6a6c18c3d2d74795ef6ae5cd2088ac709c7b60681b0b7223ef1e. 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/FRX762370916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f30bb6cfc80d8746232739378e63cd74b69dd28c0adfb94555ecfe3ee9ef1. 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/GBMJG2309115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a7ab4d23b04a55c1697273dd69397d1eb9056df7a1021d1a17656967e532e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA0T2445412.