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 0x3437839a22dcb1de17f7d4f90702c4745fb4a0363c9a30da895ed9d9990ea721. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/705b8de7-97d9-48fd-8205-fd28a0994d3e.json and https://artists.proofprofile.net/proofs/artist/705b8de7-97d9-48fd-8205-fd28a0994d3e.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 0xb5a190d51e6b20eb52d4e85977e6b1577798fe9017c01a60ad4cb02cf22bb62e. 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/DEQ022116517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba17a062ca743e1aaa7a7c69a8b60b1fd079d2b82f0e89dad5961029e817df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA062458357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6182a0f626d9b87be483c9bfb495b749f76a9335f79709c2fe2e5633e528390f. 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/DGA0P2336877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5929d0fd6395c4e6b4647886127ecc126c5ef318a77fe621a36c2403a7e69ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022111277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36043ce71b3af3ee64196eb762ce8bd67066f86b33fe4996dfa45613a6daec32. 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/DEQ022111279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630beb2a536fd63d5a0cc1ab8b273ba515634b6f3c9e99d3132f2b25c0528dc5. 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/DEQ022111280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7040e2badabcbcabb1e6bd81a3fcee673f3886822781b594f48a23661103e6. 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/DEQ022111281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67bb00f19438ae6cdeda10543cc3a4bb25f35d5e0d353c77bdfc2f2282037e. 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/DEQ022111285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f17bcbb4d244d810e63c307cb03136af4f4bcbe7d70f1a49f8a08314fc2b954. 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/DEQ022111286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f75a892abdfcaa9773098d8eb7cc123322e92181d97013a23295b93155efc. 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/DEQ022111287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf5cfcfd295b213966a10ad64ddd579bd74c2a6ce31b219d2ded621e0c48a0. 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/DEQ022111288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382551153e1ae2d461a40b27ad2735d9dfbca076fdbbe6e1d10b9885ea054f85. 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/QZFYW2007907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb87b65c34a08821348c39d72bc342583e6ef7537d3fd17116ca042b4baab8b. 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/QZFYW2007908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb485665ec95d66e322d2b154d08a98e6574591860fccce66e4601d61d5ee8728. 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/QZFYW2007909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2b2a2362e33a913f22241b1aa633b14d07b31a29a4b2ff43a689a4e49ed99d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:30Z), 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/DEQ022111278.
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 0x5682b9b34421252441fb21c91e1f7dc6635ec58aca069f462ef8d9b968f6b388. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEQ022111282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9178a3ddd47fbe4f51b84569e1664c1c63b2a7f76bd2a228dff5662447089544. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEQ022111283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b8e8015ccbe5c307aa13f2a999ce7b12cd08dcc655cb9f11783c920a6f4830. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEQ022111284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf72bf76689789646c3e2462a4c837f6e8d23d1917845cfb190bafcc940e88a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEQ022111289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5ea3935715a834fcd8834efabe42cfdfef02722ad37a91cbc3668ec3238a05. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEQ022111290.