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 0xae9bcb46accde67de7ad7a89f8899e212b07d82e3f028d00842bda24b681e188. 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/3a5117d0-81b9-4b8d-89ba-f767297ef856.json and https://artists.proofprofile.net/proofs/artist/3a5117d0-81b9-4b8d-89ba-f767297ef856.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 0xc03c839c86433cdd3ee1f2b45cb38306aef2e7a1f993e19e55d92ddd15875cb8. 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/NLF712106979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd382b05e61ab54c38cfe220e7faaef05af7cd130d055447a0e56e02a1d850c24. 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/GBKPL2201271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129b785a77e56a3d161e4182d31f63a6d20724271a67123182438d43fd070cb1. 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/GBKPL2210369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4959293f792a79b8628696ba8f75f5917045adce14ba5c0e2410f4cc22c9152c. 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/NLRD52273730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c03b5f8a6d91a496bb5915f38ace9481fa6af1a8524cb39ee5fcd315ca96cd3. 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/NLRD52273729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51687deccc492a6f521d37920549ad0bab8161054ea9e669f4df9953bbe803c0. 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/NLRD52273721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c690f469fc14294340cac0869da95e5428b5a0f9ee4f18d1437ba69f02534e. 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/NLRD52273754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da54d391e0e16addfe7c4cef2c14ac5f1c2344fc4b0f7728207c155607d501. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLRD52273723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03538c4eece165d1c77ea63ae780c432da68efdc09e70d8102c66de4a5e3539. 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/NLRD52273707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd56d52ef0f18282c236997599f2af6f16cdc05993c28d7b05e06fb50168b17. 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/NLRD52273683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03538c4eece165d1c77ea63ae780c432da68efdc09e70d8102c66de4a5e3539. 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/NLRD52273707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd56d52ef0f18282c236997599f2af6f16cdc05993c28d7b05e06fb50168b17. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLRD52273683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03538c4eece165d1c77ea63ae780c432da68efdc09e70d8102c66de4a5e3539. 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/NLRD52273707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c690f469fc14294340cac0869da95e5428b5a0f9ee4f18d1437ba69f02534e. 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/NLRD52273754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03538c4eece165d1c77ea63ae780c432da68efdc09e70d8102c66de4a5e3539. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLRD52273707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c690f469fc14294340cac0869da95e5428b5a0f9ee4f18d1437ba69f02534e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLRD52273754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03538c4eece165d1c77ea63ae780c432da68efdc09e70d8102c66de4a5e3539. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLRD52273707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6ba58d56bfee888c6eea3a774f49b1b9cf4b8645745a94291c52ae60c16a2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM4TW2132803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1426668e96e11db21dc854049a53d2f893e6d4e4544245de2ca587e183e98a5a. 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/DES232100550.