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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223ec2a4fad59861a874c5b2b89334952bdfd3716ce5f26f86499442d8cb5e43. 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/b7252246-ad0d-4bfe-b93e-b541743fc8ae.json and https://artists.proofprofile.net/proofs/artist/b7252246-ad0d-4bfe-b93e-b541743fc8ae.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb4f752130abc04e1ac762ba7add2ddfe7adaa661b4e7418f45943e2d83fc5. 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/GBLV62030601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f58bbfbdb4b33271cb619a5c2c25a20ea84843e98a0a763253da33c118291a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK1827236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409236555ade5ea3a4e750d7d9c47b2aea391551e37953db9103d9aabfa954f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEN1970709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5a30ea82a52e52cf540661a1317172053d934e57856d3cdd75aae21686d9bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8LD1728891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d740f9321dcc00605f0a7dc3c8fcafce2590490041a84b628d93438ceafaefe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ8LD1728892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cca85661fc1dc3bc981c959e490376e35edb6c0cb10ecb6fa0d37a527fd38e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2044488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa071612bc6cefd4c1d5cfeef6daae4723ec6b73d92b7ba1f236c0c0bb94b25a8. 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/QZHN91965264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e900a4d882e794f84283efc8bc8d07629a6ba5fb448e1c38d6b5baa45c26e. 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/QZFYX1945739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcdfd4e03b5f436c6fb0975d51e3d505a1929be38ef14d94c2140bbc71f02f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX1945740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1abb086e1e21c03dfe05e300d71ed3a23955d83edf1f29c8b587a47b08e8899. 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/QZFYX1945741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e4fc149601a197d39d6044a8163a92e916deba0d26c76ec0a6e8f0b0eeec34. 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/QZFYX1945742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a3cf7a65fa2490c27c09186bb799ea112e6fde7110bd9775746de0244d902. 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/QZFYX1945743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2700d5ac26b3d96c4ae596b711b53d39d4b3896eddd80b4500fe30cb97bbd. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZFYX1945744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19442229d86bf760a926663b183c2c398192b2c8a2e1a285f354d0682564ca8e. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZFYX1945745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda176f59353526633d238491f2a11217c93b7c0f8f7e74f8f52cfe0b7d93eb45. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFYX1945746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fc4b4d7728b076907f74caba1ec12994ce5ecd81d87c8c7e67c40f18ba5845. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX1945747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ef82757b0db1a992e088c1f3d943697c25cdfdb5498ac7ca90a24e58f4883. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYX1945748.