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 0xbaaef960814bb3d4aeba95a205ab8ffcf86a0786d224e03125adac2d0a1f53a1. 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/206fd3af-e0d7-4b8a-bc55-ad5fd54199e2.json and https://artists.proofprofile.net/proofs/artist/206fd3af-e0d7-4b8a-bc55-ad5fd54199e2.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 0x241498ffe86deb6cca8537d19513dd8034f8ed1c290dcb5ca2df5f3be876329a. 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/GBQRF0848325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909a8e57ee71ecd24f863bce0d700a5b7d190d9bd98eade1a9c08d08236dcfbc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:02Z), 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/GBQRF0848284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d789bf3ea318df36b6fb0f8b16ab8b7ca295e7479104a2222d1d1db18b84684. 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/GBQRF0848299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc740429375aabd5da36bc2e708071b59a246ed1063a54b0f65b8144ef8279c07. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBQRF0848287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556225f584ad0e7c9c9190d17ca7239bd57c88865b6f9bfa4c74b8843e223a6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:06:54Z), 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/GBQRF0848302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e4f4d9f6ddd7740fbf096070ca4f4775a9be2d5d388fa8075b5a3b3e7e6131. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBQRF0848318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe266cf4d15fcdada19e390b9cc23c51725490ab8b5598204b66dbd05f07820e4. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GBQRF0848335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6928ef92d71cbe8f07eaedef00c4c97edff851e064d79e9d06291ea39374afb1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBQRF0848297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89209d17f375a28898c2a4e8adcdefa0690d18b6dd72eacd66165cc5dfe224b. 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/GBQRF0848305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6928ef92d71cbe8f07eaedef00c4c97edff851e064d79e9d06291ea39374afb1. 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/GBQRF0848297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841fe6aa7dff72ebf63f1f7a1ef364bcc1529fb946f76947b2054ad38ede1f2b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:12Z), 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/GBQRF0848323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc740429375aabd5da36bc2e708071b59a246ed1063a54b0f65b8144ef8279c07. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBQRF0848287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165c7d21dc3c40849494aeb2d9131b9bd9542d6c553882d86fe85c125e1b3fd6. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBQRF0848308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36f6c763c129fa3fc54882753453439e747893680560d928f71c200cff6a0ce. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBQRF0848329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537ff7115722dacb553d6f3c195d6bec97267d11efe3f3c540b9a09798b0295f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBQRF0848293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61544df92ab1391474761f51835a7c87483ad506859ed0a1e4c936b9171e5ddf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:14Z), 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/GBQRF0848311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc723501bc05fd50ba057154fdc06cde16515bc062e9a468e0327cbc204e7e2e1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBQRF0848319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7d5bdc3e8fd5f03311b93e121ca9c11b32538d075642f9c2ad3cb24af8c9c8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBQRF0848328.