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 0xc50119c51e68376439554278acabcd6175afbd93cabe863ff06acdd266a4fb28. 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/aef376ff-ee25-4fe3-b2d6-36a08d98194d.json and https://artists.proofprofile.net/proofs/artist/aef376ff-ee25-4fe3-b2d6-36a08d98194d.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 0x488e13610fb712bdace6c10e6b3d88f91e4ee15d6c665ab76e720f22aec722e3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/IL5841924309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8654214b16aff32ee4bec654ac54f30122b2941e0712053aed2d7d80c827ac. 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/IL5842028354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863197f56d0bade8156906380aa15402964277d8f4c7950e69b7a32e45820bcd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:15Z), 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/IL5842030019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6797ae839bd65b1bf5d5c3450b978c3a952bac7c0231f81dadbaee5bfa73620d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:39:15Z), 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/IL5842028144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919fb5dd104ea97b1773dee31191b665f86746ca1595b7c7fef712f3b9a3835. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IL5842028203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbe0fe795be6817c1b1fae83dcd3c0d4d4e5c30e9303dd795baa00cc1ba1b07. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IL5842029000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e4a908fbfa9aac713f7783c7aec65bbbdb228628aa9c4cd1a0ead021aa8fde. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DGA072154123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c5422a63928c39938b5fa42451b658f2d70c3adbfd2b5c846e95dd53389036. 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/DGA072154124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4c801b59ee9fc38cbaddcfcc9bb7be905c5c182808dbccb85d191d28616c91. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DGA072154125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acf8c5ed982d5eb07867c561b5e3288dc9bcec4e5980f2e2a8e1b819e568167. 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/DGA072154126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8368a09fde495baa7f717d3c9ae3b8915eb82bc7278b358dc40264c4ea82523d. 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/DGA072154127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b047abba466236e322de0b570d1f02e6b5d5afc4ec6c1290e414faaa67ee27. 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/DGA072154128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7411a999432592383fabd9f8bb0520ab787d901d95f9253f75a6549e49e9132b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA072154129.
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 0xcd40c867459539a4f9aa61e0d3b95256d209d4fee6a25370bfc114d481c643e3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX202414720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a42ba81cfa8834756abf8f43ad305dfa03ebc12c622ccb2bb41b3229b51b06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:19:49Z), 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/IL5842551782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcb8caa811b7702195d8186726cdfb40639f48f318950db697a1374f7c1b7da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IL5842554463.