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 0x24aa556843cf9a88107edb15867acd51c03e764bb15afe84c5137bbe9ff655c2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adaa7b7f-e18f-4919-9f01-9ae6e5fda613.json and https://artists.proofprofile.net/proofs/artist/adaa7b7f-e18f-4919-9f01-9ae6e5fda613.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 0x373cf3fea79bb8f0a31d244c43151e76689eae98a7bde180018a241acabd915c. 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/DEOV42400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0893ea0f11ce884c42e20ba0aed58eacc1d249f6b9170cbdaa79e8be67df4de7. 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/DEOV42400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb241fc374b33a699c5feaa15532a28a48aa67b364eafb7da0c944391a78af. 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/DEOV42400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0893ea0f11ce884c42e20ba0aed58eacc1d249f6b9170cbdaa79e8be67df4de7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:46:21Z), 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/DEOV42400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb241fc374b33a699c5feaa15532a28a48aa67b364eafb7da0c944391a78af. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEOV42400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ee0d33cf1ef1b4e51e9295a05cc417f985d31929160031d31a8b781291d812. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEOV42400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373cf3fea79bb8f0a31d244c43151e76689eae98a7bde180018a241acabd915c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEOV42400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0893ea0f11ce884c42e20ba0aed58eacc1d249f6b9170cbdaa79e8be67df4de7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEOV42400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb241fc374b33a699c5feaa15532a28a48aa67b364eafb7da0c944391a78af. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEOV42400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ee0d33cf1ef1b4e51e9295a05cc417f985d31929160031d31a8b781291d812. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEOV42400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373cf3fea79bb8f0a31d244c43151e76689eae98a7bde180018a241acabd915c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOV42400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb241fc374b33a699c5feaa15532a28a48aa67b364eafb7da0c944391a78af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOV42400259.