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 0xde2c3fd3d37eb98d4061b0e1ac4e36d59b01c4577e7488398316be5613abd674. 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/e5fc2f4a-83bc-4794-8baa-5f9bfbdb1e67.json and https://artists.proofprofile.net/proofs/artist/e5fc2f4a-83bc-4794-8baa-5f9bfbdb1e67.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 0x8c6e94b34f7d964b4da966ff88c92287d7850954b6609d77cea01d8cbab42a11. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ72048060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8043c63b6d282bae216e70b4d4063d715a8baf782fd4f6138886740d35e2bc58. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:50:27Z), 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/QMFME2078623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8043c63b6d282bae216e70b4d4063d715a8baf782fd4f6138886740d35e2bc58. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFME2078623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ee2fdfd67a0e62a1f6328ea8741d97d95ae0237ac76dba74f3006e45ea6018. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72136565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56d87dd8f18f4a7ed3b4fb4ae3eb638c4fa4168c3e0566a63625e3b345c098a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T11:59:59Z), 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/QMFME2195939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040258b2a0ed7b864a6f61ac730e4d916bb759bfbcf401eaa836fa99deb755f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:45Z), 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/QMFMF2217221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed996f672b4e11b90bfc587c2d0a4eac6ecda626641e7983703660b66e318a0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:51Z), 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/QM4TW2368497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040258b2a0ed7b864a6f61ac730e4d916bb759bfbcf401eaa836fa99deb755f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFMF2217221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fce3e309f3dab0d1a99f2fb0e1f6406b04b7dcb80a19890f18b129b70a6283. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P42342557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd8f5a688cf289c9212e6e1ea709061ae4213b5a7c418ed601ab4b191158228. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFMF2312801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751e50216881757800b6f7c95d56e8edf6c02a98e682f4f83c46dfd49804ce05. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIW2441000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dca7f0b7995abf22688a3b7194c2d1ab3cdb111d05a007eb3bc291c9bc96f54. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJF2518423.