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 0x050d04119ad17e4c5c4a94acf5b6f6b61f7ebccfcf9853e3dd43ea4c25228d28. 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/18b3162b-c85f-47a4-af0d-a8e653542d61.json and https://artists.proofprofile.net/proofs/artist/18b3162b-c85f-47a4-af0d-a8e653542d61.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 0xb80d9018c82185689e1dc68170761bd4e0bd1857587929364e4cdf565f49d6d3. 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/QZZ7V2497423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae9807013c5f1333de4caecd9ffd892119ed808d4add4f1253120b086867fe. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:35Z), 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/QZFZ32585513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e73c6296237fd0e3678c39034ca7820ac6d437b0b6bcb5cb90bb10edaa8627. 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/QZDA82508450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd41600bb32fc9fb6dbbd32004b2b6b4d972af0a6ef90d35869419ccc686a83. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWQ2567965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93ddb853e606bf22b44ca5c6921d83d5b66d9636ba5f66f2893cdd6ae6e023. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:01:55Z), 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/QZHNC2580460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae9807013c5f1333de4caecd9ffd892119ed808d4add4f1253120b086867fe. 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/QZFZ32585513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75401ca4b88d9653e1e7540086c192c161469e9a1956dd6af9308621ac437f5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:22:00Z), 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/QZWFW2465603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c38a4362dbf8dd47b9459ad31a3613ed29236555ac614bf94d756417f66175. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFP2477664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab1801bc2a1300eab6ad29617e850d3fef20bd90dca6b4ea66b414a72b5479. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:20:56Z), 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/QZK6G2581065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d60e97891af9b7a4e56f7367965144e84e57ed8608ad63b416d41e6b5e7aeb8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7L2437021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d9018c82185689e1dc68170761bd4e0bd1857587929364e4cdf565f49d6d3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7V2497423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e73c6296237fd0e3678c39034ca7820ac6d437b0b6bcb5cb90bb10edaa8627. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZDA82508450.