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 0x7df8d4d7fef561bc5a1aab18256f3b98413963103e416e408f037b7fe95167ca. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f56d2940-e09b-4a55-9e8d-fd85517959f8.json and https://artists.proofprofile.net/proofs/artist/f56d2940-e09b-4a55-9e8d-fd85517959f8.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 0x2b43ce841d7b663a357c17b1204f7175b8614ec8ebe8d1f9a9b73c3ea8365ff6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ792436922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91d1cc6544e52f9269b3c84bbdcaede1ed5ffa1b5b52ca64bc52e823b8d11be. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:34Z), 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/QZZ792436923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf770620dd8c12507b3b93b17632fae7ddbf83af44c57cd923016e0cfee83cda4. 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/QZZ792436924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80a5faca1ab8fb505c418394ebfac9ce690b6b8e35cb1750b84367cb2f3acc. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZZ792436925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90126167129e7c0f2c31a0317f5421155d7528b8ea1ce4f1be1f97970195f3a5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZZ792436926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285e52da5df7dd689024bd384e8e28558bbe937d1ecf418488633f76480ae1b3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZZ792436927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bae2218981c4d58525003bf7aba02cecdd33abf2d3083f030d669b964ff014. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ792436928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95984da24eeced2910d3e3218d20a676180b6edd74c7b1d9477131cced6bf6f9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ792436929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da18cb09886a6394fa7c4dc79dadbfafc4bc5d362fc8372eab2dafe419fb801. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ792436930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515b6c971915b43aad111316c16ca684f8f1f5a8577d4e90a6130f24588d14b8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ792436931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c982ae3c024d410ceb60f3ea4056d55cb94636a8e2a402c56b1df945a64a14. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:58:46Z), 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/QT3EY2449388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b97756aafb9fef4d488f901b9851383dd4a824c12c7f73233c74c82595c28f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZFZ22574431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa68b74cbb1a97a448893aafb8170b797ced54dc132665ff056a9a9188f8944f. 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/QZFZ22574432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cec19265f1a09c467eecb3f87c7614ff9a27c5836aabc507b3d82c72b3edbb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZFZ22574433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f2fd3555ad1e29be501d2f38d4bc0d747864ccd9e388bd04a6538273f15955. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ22574434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9652db8e957e3f3a223061d16e7b026ca5e5fb8039fa7d265b75d61c9a73b41f. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:09:02Z), 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/QZFZ22574439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4493746770765095ef27958445bd9f39383f221fa9aeef4b599546c9d5a8b1fb. 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/QZZ762524198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b87742183efd4bf173ef71e6636e7eef7ef6ea2e0a13e0bae706365d2bef9b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7M2594872.