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 0x901d68a121ec1e4a0822a999eb20933d2bf85a7a8fad7550f47a92af9e4750c7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8129a0c6-330a-4c9e-a71e-9058f9151f7c.json and https://artists.proofprofile.net/proofs/artist/8129a0c6-330a-4c9e-a71e-9058f9151f7c.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 0x67b3a88de6015cd0511289942a44a78eae109305db1f19910918e55a48de1418. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVL151902674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336205a2f468ddafbd94a6b4f464da6b71cea284c143bbfb703bba5724fcc478. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVL152201067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a5879ecf6546083912bfefe84df5b5a9f8ada7032d1d747c775ea167a294d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVL152201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc565cb3b96df5648703dacd02c3602ec2d06c25c18f03f23a14aa3acb5f05a1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LVL152002124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d4b9dec4e95c7308566cb7ae98f94d15ea821e747cbb17270ff4a432e68cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LVUC12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2419cc6b68b7540d926a2338ac0048d5e98aaa9e589536f84b965cfe9f5f971. 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/LVL152201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b020ea1ea95d48eafc2b2095f3a7171d2acc6be20f04f39c852761dc095526. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LVUC12100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b753a6f6b2ea40f14192c7bc645395a060feae4325efb0de8656b39f90a263. 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/LVL152201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa0e3366b18f87aa34f63bf54059da74154f20fbd34f7b58d701c105144a528. 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/LVL152201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d4513650fa344cc32594bb7e1af1bc9cc410707f5052709b58cbca7aa47dd2. 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/LVL152201072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f0ddf4998c1f0e9c7a496c08f4664b36fb992ba5cc28d5361bb643698ea744. 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/LVL152201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa4f6657ba083b145f45a3a55a99b99a811d029cb2c71d2554715ecf4c0f770. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVL152201068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b020ea1ea95d48eafc2b2095f3a7171d2acc6be20f04f39c852761dc095526. 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/LVUC12100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d4b9dec4e95c7308566cb7ae98f94d15ea821e747cbb17270ff4a432e68cd. 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/LVUC12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc565cb3b96df5648703dacd02c3602ec2d06c25c18f03f23a14aa3acb5f05a1d. 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/LVL152002124.