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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e3b58dd7be1462db35513fad0a5968b74c399cdadb76a64d273ca69705420b. 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/95e146dc-2130-41f3-8446-720f1b72c68e.json and https://artists.proofprofile.net/proofs/artist/95e146dc-2130-41f3-8446-720f1b72c68e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb8e60b45e72d66004870911a38e6f3b5d4a0960ccea011d6ebf228fc86aa0a. 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/DEBG62305750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb8e60b45e72d66004870911a38e6f3b5d4a0960ccea011d6ebf228fc86aa0a. 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/DEBG62305750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcbc52597ccb81ef1346cd54973ecc65d8e13f33a15902aab94eb93de1f99af. 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/DEBG62305752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb93e1feff7e237ad91600b315d0643c341fcb69b1b40c6a36932e44e8b86910. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBG62305753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40bdf9fc08517abd25de2774fab9d9ead406b0ec24beee8a85f04c79f7737c5. 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/DEBG62305754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3596fbd98590ddba5337a2aa12db8d3bc378f2dffc801c6c2f90808534b243. 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/DEBG62305757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66103f5ed5e8b08611ffd553e1dd6e2c9b3e8a3130c90d99da415fc75a1c1051. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBG62305759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe641dd65335fec2a1c19741b393ead66d98010da47ef242dffa5945882d87b92. 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/GBKPL2160510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4845c94b02138ce7dd9ee1ee88191d56c0009aa5e8a2cbe1eecadd79d46870. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL2206763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e50a03435280dd60228e9f039735e3c9e8f203d50a714060fc5e52f9d86668. 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/GBKPL2213150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0971a54cb635fd8062e644870ff607eb05ee856bd00b21cab97c3449ab4a703c. 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/GBKPL2295332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25aac73758b2b34fa26c49c02e8901f146d780cd0787fe9665dc6c79e06eaf1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:10Z), 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/GBKPL2213149.
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 0xf7d310fda64fa92556edcc88f827a9706cb48d311ee0529696a78286df27d01f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEBG62305755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba794a75b93455e304d778ab5b8de85f7540272d6641a7981f8593bf34bc8148. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEBG62305756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f876223cf82d7742e6e17589d1dfe8ddaca27a0e0ad73fd79b7d1c6aa061fa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEBG62305758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29dbc288668aed8a81264ea5efce9e3451f2dadd762d76379e2df4b8d85dff0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEBG62305761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f34cd61b45cf5a366fcf9baa5149fd0ff2885f175eebe3a2518dec75ef0c2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKPL2210973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40aafc4e7552c2e5c092e9bdb61beb51737a266f19d332b7b6d15e455a9dc48. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GBKPL2213145.