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 0x0458221cb67a4f0ac11a413bb0eb9fca09ecd1604e227c185c20f1d1b73c1579. 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/ef01e308-c058-4dfd-b94d-e3ef422c5162.json and https://artists.proofprofile.net/proofs/artist/ef01e308-c058-4dfd-b94d-e3ef422c5162.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 0xe9fb9e3eb43d25022e6a6b55278c9f6e02d6dfdfc244cb4d14c173a050c0e45b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USQZ31812004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f06a8b37871bf94c9f18c3b61f556ce433c1d702e2955ea1eab6469888cd18f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:15:43Z), 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/USQZ31812001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d968c6c0ee161b84a54be82147cd534142602529e5f720f5b089acbaa9899. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USQZ31812002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4080f3c8fda700211b9ac818bcca3fafe4d46c219dfae60e07726caf8cdca028. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:40:07Z), 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/USQZ31812003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ab95414c3872a223108994a1d9c9c0585813981610400949e4bd0c758a1703. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USQZ31812005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82f51509021618f6cc10b9ddfcbdb0ba155f2e1e322a1e314275b0670c9cbee. 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/QMFME2162210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3f6fe2bbb4486d81bb76e0ea4e5e478b0997a08e9db6ade7c0b454813c6f2f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMFME2162203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aef89662d352b3b454db3dcc163ade3cc8679e9165959ad29422d5899c96bb8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFME2162208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ba776bcd8b62b7c4e049c873046d6149173757d5a7a13333accaa710f4759. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:44Z), 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/QMFME2162209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4c7d4576ba125ec3e9ce3c7823ab1bf076171cd67dccbf260a6575fd8ec6a3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QMFME2162211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0434ce30427ede666e73f1c6f74c5e34bc2674d47c9922ddb199ab33e117c272. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N22286293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa475fc373303054b36e74973fddf1a012c5f7d9a9fc0f2b9f33c654f14dd663b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:08Z), 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/QM6N22286297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c665ab831dec1391ec4556dc4b5f843d8319baebc7e5bc6e1637a9306ef65ac. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6N22286299.