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 0x86c1437627a8ae6719281dfdee884f88bbb3f315aff90573efa5516f36e4e338. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/304380ef-38a1-4d4b-af80-7b7bd0bb91cb.json and https://artists.proofprofile.net/proofs/artist/304380ef-38a1-4d4b-af80-7b7bd0bb91cb.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 0xbc7632201f2152c3d1e6bffab63836648b10e2c72a786ac4c39d1570d06a8033. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJH2530491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64444b0aa044a9b812e0da9a1080c49b32a8cd93060b94f48500e315216ddb4f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJH2530519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dd947b8478fba8e7ee73478ec49d389839b2e708bf273aebcc36e878dbbfa8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJH2530537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734dd6adae1887e18f1019c4fdb65dc693242b4592791cf7b853a8ecbdd6fd26. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJH2530558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9e8a2afb1264aff34ff3864922732e2d9a2cbe98572229862abe09add1182b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJH2530571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebed6fad671b8c881617fd4351f0d86e1fb81d41b01ea75be860ebaf6ed1a2a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJH2530583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3f79160a01ff91d48343eb8a744eeff2e2cdb8d9091bae3b07c3c9c4dcd0a9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJH2530618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1881373d232d6014e71390523a6ab56efd3589916ce2e057de7f66dd3e81c4b4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAJH2530634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926120e2803c578c97d0c2f708f2f63cf48fd71dc39964fe5a5c47c0fb0feef6. 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/TCAJH2530645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c29b7c07044c1c3190a02206d8239aaa90409d8e64fdbf59e339887a3c52e56. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAJI2562763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a5804ce7064d7d4281e16a1bd18024442a265d65e8f5769be7d3cc050ab88. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAJI2562770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5f94f9d4006f73e80fc088bd73585cef02d778129c329aee2c512daa7d24d4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2562776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0869c91487d8e25eacfb35ea4fcfe45cbbab86daf0ff33ff9a608b1293c4c3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJI2562788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df71f6e7652d50975efce3b080feeb609e856e02e510c25d82a2cb2ae1a50d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAJI2562794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0c7204851f946fc45253fa18032a16d44db647d3dcd786793b29968a58336. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAJI2562802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1266136cd2e3ee8cae3fad87bfda576cba953d6fb5efff7186da86dcefc0719. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAJI2562807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93e5088119c46c003918992499c8f5bda693ed68ec5ab62028ac382b54024b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2562812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa52287a87e471c1edb5a49c5392a1ddd561cd6ed55771b5e09f2fe88223947f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJI2562822.