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 0x8757996a68ce10dcd534a9f47d089e98f7d4cea1f73fd8ad07e77a1b2a6d5037. 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/f6583ed8-efa7-493a-9256-c75b03ff1010.json and https://artists.proofprofile.net/proofs/artist/f6583ed8-efa7-493a-9256-c75b03ff1010.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 0x0bfc7e2e7fa6a6a6fb53ed5de2226ccd5d8bf38dd9f063769b0805a4e65f69d9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ZAC012201196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67288e37445ef2aeb19b1701b3faebe6dc12f816cfa0035fe6735e54b7e34cb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:05Z), 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/ZAC012401288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692f8b03de359e7d2de6dea7030487b36c505c9fde196adab2f8d0a871a6f254. 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/ZAUM72101424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382386df3c1615f226eb336b657858ba3d728bca86ee57ef2bcb2fcca93d327d. 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/ZA56E2416022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a340240b1d604020e455a501df64e2305fdb3a7bf059b8e87a5fbf0f6227d3. 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/ZBRAD2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c18368e0a76214f86fb23fa197ef5e5964e2cdd293263d85df9e853e5676a. 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/ZAY362300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b4d8915daa6c1f89bcd738116613f94b1de74425fd34a251ade8dffd47414. 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/ZBIJU2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d8aa3b860796ca043317cf442a9c7ef465d562240fd1068a706d4751d24700. 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/ZAC012100451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe293c15e2792a4a5a0e8ff173b2dbeda5c2517cd49cc0396c4f2dd832de8dc2a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:28:01Z), 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/ZAC012200718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c23dd4454678c5659212e08d212785627a6e946fb005f611efd8d2889612a8d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:00:44Z), 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/ZAWPU2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c26584d7b5b7d78dba628e9af2ecbbbc6b7c7fb43c2332c6b0f85fcc68c37e4. 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/ZAC012401138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fdd6e1ec25c2696c60d4a5bac623e9561731d23fc1fe26b397a6d142095940. 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/ZAP082410004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf58669cd76d864605f3706d85449ab03487d8d69660794a9852bf846eeda462. 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/ZA59Y2200009.
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 0x2938af0f73e44f80979ca7276e8c02e33d773d11fbfbbc49dd36111970c0c3d0. 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/US23A1570960.