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 0xec56a317338282811ebe6377a195cce720f3cad13b157e8f35c4968b38b8e68b. 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/a85018ef-dd8b-4bc7-9d0d-19de7cfe776d.json and https://artists.proofprofile.net/proofs/artist/a85018ef-dd8b-4bc7-9d0d-19de7cfe776d.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 0xfbe39c9a270027f2447453216cb9a0f4d03d792cd1a35355e8e69636a5801fd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X42504564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3463f70924cfe9902bd217e74a5160b32182c40de2d0dce0a2111bf178749a1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR2X42538347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a20f4bad3ea8bf2e0d9089a32e12b22b8e77a38202a675ac3cbd278df4dc33d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR2X42538349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d9746aaf9231b3d0d52761ae7cd2b6325504b753fbb2b8d65171c2ef31708. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR59R2505353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e5e989a481561561a46ddfa709b28a2efad54dafbda2959f9b090d38471ab1. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR59R2505354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071be9e6b18672815fb7f37e32680b71072e19789e0701a6f7926f7837cdf101. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FR59R2505356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c80a0795b9b8a5d5dbe0cb5b82d4c30a1f7dbafa2f4becd4faf3f21b91234ee. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/FRX282539838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559cd9ac7732fc6c65385657aaf1c19c20c515ceaadc9a379730fba21d7da60a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX282539840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406720684c148d92a4961726a80c6ca36c02f68a161c3581a6f00f5ec418843b. 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/QM7282552078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7a23f47a3068501a2ed788ad4e5305925204242d35d1dd70d0e245400a625. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DGA052567402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b4fa6f8ff89f9e8fc4afa1f67283de721636bed59bab98d7e99503ef1c82a0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DGA052567403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6840b11c4836cbffc405f20040af4dad7570fb8c033ae9d05ef2da00b4d0b43d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DGA052567404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255855f4850073ac7805ff86c9ae37e01119c3b46dac8478f2d0c064b218a2b2. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DGA052589583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a1b46fdd2647d05e2f7eaf4a47502a0988385330c54e2cd9b35762c08d0d1e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA062582583.