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 0x3437a2556f5a5b4844246b96013779fa671a5b96d48bc55511141841746a51db. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f36533d-3b8c-45a2-97a5-69ebe88b4b7a.json and https://artists.proofprofile.net/proofs/artist/0f36533d-3b8c-45a2-97a5-69ebe88b4b7a.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 0x5b976c745473bfe7c8267b630950c99ec82cd12e73903c28ffbe3ad433c1522c. 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/GBAHT0003750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed746a5f85e16bf08cb3435aa6717630abfbb94e42debb5490ccf5eddbf439e. 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/GBAHT0003761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb02326a3838aaf91f9fb41a4ba052c2f25ac3d11593d1ac8c27ea3b00df35fb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBAHT0003963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101a4da1647408cc77f3677f79c469674bba2ae3fbf1e85e0e4df37d63180b51. 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/GBAHT0003943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd418ece351a694b44c8c4e12b8c3523be87f115b43cb2aaa436cba2c775be76b. 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/GBAHT0004012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead777e6df93e29f73a8a26c3829b34af81af5817fc60a49fd0580063479c02. 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/GBAHT0003757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a2cbe25766418abd5377fb8cd3479c1891fc6b51d6536157e34a7ff2e8bf19. 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/GBAHT0003753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0057c0c8801c79eea9f988445be1ee74fc1f3776b21c26125d3a0d0f9752c0fe. 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/GBAHT0003758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ddfa21c68b33ed5131ec60694abbfd309fb05dfcbff2e25afb1a8fdb497c85. 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/GBAHT0003755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9e74f948d5ec61aae98ed40f7b56f78cb2811fd5ec4a1b19d60f1176ea6470. 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/GBAHT0003944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b976c745473bfe7c8267b630950c99ec82cd12e73903c28ffbe3ad433c1522c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAHT0003750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe21d0ea3fc44cf8c9f5b491b2a2821b4f8d92c4f28b09c46fd801d9c173f5b9. 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/GBAHT0003770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ddfa21c68b33ed5131ec60694abbfd309fb05dfcbff2e25afb1a8fdb497c85. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBAHT0003755.