Stonefield may refer to: Stonefield (band), an Australian Psychedelic rock band Stonefield (album) studio album by the band Stonefield Castle, also known as Barmore House, 17th century manor house i
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 0xf15ca36eda02398fd47677e40fbfbc2c35dd9f48d9a7c632c4943769efb36efd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca2ba008-9241-4681-be06-48430e25f258.json and https://artists.proofprofile.net/proofs/artist/ca2ba008-9241-4681-be06-48430e25f258.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 0xda45fb8ed0a3200b6b0115f20d250a5b68dfd3a638c360b5151f76db8da925c4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUAB01000699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42e86f69866dbdef274d91c5b0ab17673662755f79a2464cbc6473bf80bd86. 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/AUWA01100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff76b94bc0a3b00f50ea941061dde20f276243fce0a5e08d73f62b36c0ca398. 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/AULI01388520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d8a096cdd1060317cd3cf4a4e3f922e6561134ee484742d1a73b02d32bee49. 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/TCACZ1787131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48775890913c88d305d436b5e2aa112fb7bda640a092b666f208712ede2dffbf. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCACZ1787133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10804d0261543600ce88ae928b78229e0a0678dd58c8836024e3bcf19119abe0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUTZK1700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19607c86a48301b1c40e095459cebaf751c93fdb4aaa2a5f9cf58ce72161767. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/AUTZK1700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc44a7fcab2450a99a11ac2f6bb1435b3f763c459c65c59ff000cb4dcf9640. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/AUTZK1700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7599c2c29906d3af3ea45174e6b6ba7372540a0badca17b74d117e0c220d90. 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/AUTZK1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87018a5c966b25743267fca18e99156b02b5ee626f550924f8473ac3a3b5b45. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/AUTZK1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7599c2c29906d3af3ea45174e6b6ba7372540a0badca17b74d117e0c220d90. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUTZK1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87018a5c966b25743267fca18e99156b02b5ee626f550924f8473ac3a3b5b45. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUTZK1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84afd9355e3bd91df9d82242097b81be54577f5ad8a6466b1f6642086b93049a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUTZK2200006.