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 0xdb0b26c2be59e91b221deababf3f4893f0beb38481e0c4b56ecc7eb56ee6d01f. 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/ac9965c1-dc8c-48e5-866a-06026edaa56f.json and https://artists.proofprofile.net/proofs/artist/ac9965c1-dc8c-48e5-866a-06026edaa56f.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 0x46cc30710a7fb855c97c4c7527c20229398a3e0bf6342a7f38340988d1d0a624. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCHIP2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f6bbed9af56458f1e5e7b3d7d7ccfe4b9fc4adc7e69dc476947c23de5dae6a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:44Z), 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/BX1TU2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f6bbed9af56458f1e5e7b3d7d7ccfe4b9fc4adc7e69dc476947c23de5dae6a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BX1TU2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf568b3797d5eed9faba305be99a3907e5b68bbdcbf5728127eaffa601af2defa. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/BX1TU2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4927eca6829a95ae422ddfcd52d34da2bf80f15893a7a3111db70352f246c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX1TU2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18660a9db5da377a981667106db571e3814d4ddd09ca6dbcc2518de2a69a5a8c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BX1TU2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18660a9db5da377a981667106db571e3814d4ddd09ca6dbcc2518de2a69a5a8c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX1TU2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde269659889799d841e5bb79d6645ca6089dd43653ae4aec5a7b07171b705abb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:07Z), 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/BKGG92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5a4c8c0d04b71c80efc68b5af1b071d9bb87c664e4ffc8f619ea43e6e3e4a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/BKGG92200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d94f6316fa1cd9af072106d1f334261317415f1ef90d7386f7fca1a87f9d006. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:29Z), 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/BKGG92200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0762d93e5a0c8ffbc8ef932652d605537532cf6e58c3d6b17c686df5f998c1. 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/BKGG92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10541761c0d1243bd38a67c68dc74c88c53d446071d0375a78780b05eee19de3. 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/BKGG92300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847883e4a4671047e9f3f910acb532618a7fb0f4b2ca39e0be1f64dfe4d6c5f0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BKGG92300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce92233ff6fddaecdab037ad134c4e2fc77fe81f6709710e6d163d138afbc53a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKGG92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59cef69ec76e56c0c6cdbf2ebd7245008374ce9c4c887cd5fe97fb16bb0efbd. 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/BKGG92500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df68f6a6989414add9eae1677c4a390a8f3c166163b0f5e8484ee44f21e90c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BC3RD2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf096d362070b0d786ff6b10e2190a394801280e35e1b8b25c2f1615794cca65. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXNTX2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec39041e09a2b79298bdf1aa4f8f184dbfe594820ba914ab36e6e29033d4b2d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRVWS2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb87082d70d189c548cc91c042685dbf8179bac2e347be2cc276f3deaccb6c8. 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/BCCXP2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930fe8e5fb94a8ff7a416cc9a56b5dbe3afbcf0a3ccd59571cc0cb432f56c417. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX1TU2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4569e96f003c870799fb9fcf4def03fd61023a6cfc6ec6395365a7864bcfe997. 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/BCHIP2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabfccb5d28b5a52adbe18c7ad6bb9beaa4299a94116be9887a7090eb7aceaad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKCOO2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce8fc9fd7d59c451ba50cde77946ec895fa2151a7479c2eddbd87c857013ace. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRHCL2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c15055ef82d8791901a9cfeba2779b5012a40f5520ff0ed76b4d3625d5050. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRVWS2100003.
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