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 0xb7d71eabe73e493834ce2d9178323f7845bd504aa3f3d047e2daa7109598b312. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80a1f87a-deae-473a-b951-ce8d43699cbf.json and https://artists.proofprofile.net/proofs/artist/80a1f87a-deae-473a-b951-ce8d43699cbf.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 0x68428749a579778db4c3abf5ad776537d846cbb415f1ba87aa89a142d87e84c2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLFP1588323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff3f1a6eb2d1a4437d4ae2f9ba882d5565870de28d80c427e4d5e7b211c9405. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLFP1588334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ed51c597db7800b6c5dba1187b3afd576e8612891fad9006a459196cda0ac. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLFP1588328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd339748625364896f00e7ce6ee95dcd85147d017157a24777128c5fa2543e1de. 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/GBLFP1588337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbbf8b42cd8bdfc462b993bde08d476feb875f20c961e64bde91d1fb3d1c6e6. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBLFP1588338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3383b40841c1a1e832922f3c53314290380ea02daa59fb7317ab20918cd667a3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLFP1588339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc601e97d0044ec901ed33b29dc84e242c5ea583acaf58cf20228fad5ad4cff2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLFP1588340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed9ebfdeef14f7d5683c7cff4c6daa6f13670b12fd77eb67166f57b90c63689. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLFP1588322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f2476105e7812260aac465ea5a66296edd4cc84073cb3010f3f80ad98cbfa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLFP1588320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a01219b5fec7e1c0d0055fe062367b9a7bd52c21348f26c8942d8fbf8feee77. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLFP1588326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c95f886de84f110ba0c55097b6908645178e4b9c3ec08ce9a6e96d66e534f5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLFP1588342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6b8ee154a40a90fb2966beb5c3995fef366f55250f766971e96c9d2a677e75. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBLFP1588321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacab295a469d2f02e9ece0647e12c7bfc8f39c6af8eb74f37fee5ac580cb60d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLFP1588345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f2476105e7812260aac465ea5a66296edd4cc84073cb3010f3f80ad98cbfa. 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/GBLFP1588320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6b8ee154a40a90fb2966beb5c3995fef366f55250f766971e96c9d2a677e75. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP1588321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed9ebfdeef14f7d5683c7cff4c6daa6f13670b12fd77eb67166f57b90c63689. 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/GBLFP1588322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68428749a579778db4c3abf5ad776537d846cbb415f1ba87aa89a142d87e84c2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLFP1588323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ed51c597db7800b6c5dba1187b3afd576e8612891fad9006a459196cda0ac. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBLFP1588328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d009268290650d13854bb108ae071564cc9cf744b741b422b95064ee88fd17c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLFP1634807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68255d729f843c37c2c4ca0103582491f266ad0f42b905f567152e71421730bf. 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/GBLFP1634831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d4d49b75f37a5c9d163d567ec72d53628558638d7053f2afc99bd0145e380e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLFP1622235.