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 0x4c524572cbf6b7d17de5f105328f948e0311e220901e939fc9fd833d76aa55de. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac1efa6c-b30a-46f4-b12e-ae88b662d430.json and https://artists.proofprofile.net/proofs/artist/ac1efa6c-b30a-46f4-b12e-ae88b662d430.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 0xf40fdf19360c0a0bd0575cbd73291fe1dc855167fc6a1ea5a4a4b889b8342435. 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/GBEBS1300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e95dfd347575cb64563f7d6add2f311235ac4094d66d20fb7004239b759793. 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/GBEBS1300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8d2d81d6442cd84fd18798925f576d1c1fe78071f5a21a75e10c6f5bcef805. 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/GBEBS1300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce72d8f957071a35ad42e21c4c1cdadbb2409191a8846a9a06b2a7c3ab1cf21. 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/GBEBS1300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c062c1ce95d8a584425951656124fca6ded3b5663e84550ce5ada75b2d2245. 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/GBEBS1300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480aa31b9958a5f0de9d11a97ecbbdc0e4e28e348297c77ec316ef7022901b84. 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/GBEBS1300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f220a3c0c28ff983b2cb833ee9d170781028df1a0bccbbf3a2fc5e661315d6. 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/GBEBS1300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcabd1fb361cf8a6f202de23e2d31b29e0010c2bac4c5ecc3056c5da71fea9d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBEBS1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b860ebb2dba23cd72109eded12a09c71a19d106b11958326f550ed5bf8886. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBEBS1300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acad19ad57cfa31d5153d793b8edbf74c62fbe1466e016adf1a5cf489edecbd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBEBS1300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527e4b7d9390aa28aa44b20240ce69f5bcf39206a24367639e5d8ee2340eef60. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBEBS1300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba32f71240904232f72f4cbd877755d05db40c9db98dd7eaa7bff36cbdb87681. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBEBS1300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6584af87935ffddced3192eaee3d7a83e8df6c828f101c706a4c280d99193087. 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/GBEBS1300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed07870b8c2fc33b1a07d05c851b95bcb2d4e7a7e910127d14c6b5e0e75a1f2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBEBS1300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d07e4e765c065313e9c376567bb138b4e94ee42dfe5335670644c629a42143. 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/GBEBS1300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e90da98e2ea57cd5c6c2b0b229c0f3cc8623f7233e1ba831aafa17faf2471. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/GBEBS1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12237a85fe9eeadef0f54a1fbbbabe2ba1251242f05b5dbe0b06590f7c2a2eeb. 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/GBEBS1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376fdaf18c0a5e09a2dfdd282ff44cdd4097fb5a8548e0dd66c7eaa06200a2a0. 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/GBEBS1300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca39c59be5d68ef6484d29725237e6e8b520995e374f1c535d25524f364d47f0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBEBS1300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f120eef7ce1fe5e4cbb6d9e57e5f8324a09d4e5ce20a41822d17e7ff124fb1. 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/GBEBS1300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175f9c956dfc96d5a2d1d99632baee7436da95b57d2c1009291e1af4e8d83416. 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/GBEBS1700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb36b9445339a511fd4c4662e713ce4459ee97be1fbc3ee444d38b8c903c0a4. 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/GBEBS1700087.