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 0xf33f0ce01e0faec0372fd4b5a37a8f5b040ca4ed8a7ee8fef7f4badd8e35a295. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15b1e19f-8041-4387-80d2-e08dc3d80770.json and https://artists.proofprofile.net/proofs/artist/15b1e19f-8041-4387-80d2-e08dc3d80770.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 0x9760f486893cc0a9802381f19999fcd79a065705aa082c3ad9f006d2faa7c14c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMER2255872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0110efbf9050dad411fbe24bf41dbd89a57eeff22fe0a26ed7ddaf4089834848. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWQ2252223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d24156ccf656a9d23be9577615d3b954ad8be1053da47ef1580e121614d740. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWQ2275668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c30f85eea99ed994853b1239a3857aae68df0aefe8b7cd039a9fe9f9cd1c1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFYZ2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f87336fc8d667f1dd2e38397ee28c5388d237898d0a7dccad85bceb6d887db. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7L2529121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55731aa1fd6bee2eb260308dcd9937e04be634c4ec256b539de0a7cf07c34ca8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7L2529103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaf9e2b3904011126136fe352cc3f227128f7afd27a77d6a76e4960225cde52. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7L2531783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca1f4c019137d22e0247a120880dd2612ff30141ab0b7ad41d130b62e0d38d1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7N2504311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ab6e3c9d796919d96efa72d3870b90cfb0fffaf681153ae2b53cbbc7e9181e. 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/QZZ7Q2515940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1eef00ceceab955af32e3638b84c94f2c7a83b83218bc2e9a9014600ecde66. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:47:58Z), 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/QZZ7Q2518253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0662651688583c39d51cfb7c9e52ae53c90eca88e9f3892c1d1cea5097ccf69. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7R2519035.