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 0xe5e579b0dd4552abc08d7acaf97f8c7f6edc08947bf3657dce40de34120719b8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b092e8e8-5986-40eb-8b8c-6f8982283fd3.json and https://artists.proofprofile.net/proofs/artist/b092e8e8-5986-40eb-8b8c-6f8982283fd3.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 0xcfadab93000a8f48b54ccd90bb6c5d8be66bfe932d489c943870e6c06495b643. 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/FRX202037242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d73addf9216ced6b4f34359829963b2150ba378bbffd461b273d1361b8e9b. 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/DGA082390107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8bb86a24f65b3be9e6adf98593ee09f1191bb3cff0dc15881d6e8144fd1e2. 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/FRX202037243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95801530e26fb8b74071ccc54fbbe150835c0a5112b1a1476f6e127791f270af. 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/FRX202135549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b7ea28264c8c1ee6b4bb9b08003af004d3172e8fbf5c3c93f2231cd580baf. 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/DGA0L2301361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d71bd2a0e99db28095373e3b58f803a4fc05edc76b78e7bbe51be6a8bf55f4a. 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/FRX202037244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb284c24affeeaae28df5a5d8cdc1582ede92eeaada90093a9c5d0ff3b7b01f94. 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/FRX202221645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095604ec11e64fa916f601b658bf355e78048a3aaeb14022a305e730009f9577. 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/FRX762011320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeda8a7133eb7bd06f33f64f6ac0662ef34c290bfe46ede3a07c758a1bf3a40. 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/FR26V2068617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d73addf9216ced6b4f34359829963b2150ba378bbffd461b273d1361b8e9b. 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/DGA082390107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb284c24affeeaae28df5a5d8cdc1582ede92eeaada90093a9c5d0ff3b7b01f94. 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/FRX202221645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95801530e26fb8b74071ccc54fbbe150835c0a5112b1a1476f6e127791f270af. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX202135549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfadab93000a8f48b54ccd90bb6c5d8be66bfe932d489c943870e6c06495b643. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX202037242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8bb86a24f65b3be9e6adf98593ee09f1191bb3cff0dc15881d6e8144fd1e2. 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/FRX202037243.