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 0x50171ec8adbe4908872e29788d71467b64d9480744d92c3dad64055b63b3daa5. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33db6ae8-53d4-4ad1-ac17-ce49c2ae86eb.json and https://artists.proofprofile.net/proofs/artist/33db6ae8-53d4-4ad1-ac17-ce49c2ae86eb.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 0xb549eb26d00c459b8dbe97cbb69cd871dca963a9447f026f57e7efb46c8889d9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRD9M2200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee5486280fdd34cab4be7b5f4cb107c41fa326b1c54ea2d2dc1bd947207119. 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/FRD9M2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bad71cafc4578e8d5965bc3d3c1160d56b07012ea168cf4f7690082205f47e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA62275199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe383aa9136bcf3db6556463be3ee9e67699910238cea8b274bd7218811e27ae6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QM6P42303561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe383aa9136bcf3db6556463be3ee9e67699910238cea8b274bd7218811e27ae6. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:56Z), 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/QM6P42303561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc34f0a41d71a82c3bb0b3e33451b31e8e15e01ae9687617ddea12b1eacc615. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QM7282361335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc34f0a41d71a82c3bb0b3e33451b31e8e15e01ae9687617ddea12b1eacc615. 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/QM7282361335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f951a4db3647a545c4bfb088b3f76c09bc5b78099a1c51c830af3b674e4ffe3. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QMDA72359017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff6bb548832910aeb314472ad2e967c4fa1817353dcea150b21bff4bebda7b6. 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/QM4TW2427820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56649dabe9ebe8948351d9ea6114d36797094fb04769c8b5f00d417133561bda. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:34Z), 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/QM4TW2427822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56649dabe9ebe8948351d9ea6114d36797094fb04769c8b5f00d417133561bda. 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/QM4TW2427822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735289fe200967028acd0e2f7d3f89b3aec4c10a1b41faaae588039860e2ca5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM4TW2437892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735289fe200967028acd0e2f7d3f89b3aec4c10a1b41faaae588039860e2ca5. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/QM4TW2437892.