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 0x134b04183104452a1223de5ec4f78763920ff4203aef01589f47d19e42c40a75. 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/e23814ba-ee4d-486c-a524-9aa5a8b3374e.json and https://artists.proofprofile.net/proofs/artist/e23814ba-ee4d-486c-a524-9aa5a8b3374e.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 0x06afb19467ffd2b4e5d78e3f2baea9a31e7d6513333972ce90f626aca4491d98. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/SE5BU1929982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b6de3a10bd0d36ad9aca2f890f32f0d3c59e095a615a1515739f2e1bda1510. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKQU1942506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474cf30ad571515f5881b1a81954d56f8af5c4db8e44ba64e196c46b6ddf4520. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/FR9W11905134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16e74b3c2a462432d8632783aabcc382a0029be2a61786a4601e56d627e71fb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE5751987659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f4b2bbd0d78c6abc91cf534223aead99528b126e4ea225df6d4ceb1e80f2f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE6HN1995708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff104a96520435e8c10504cc674722db6fd366d741363808a090c12d8dbc9e67. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6I32088144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9549d4ca22db2b0877c5a03fc3a0e7a18fcc7a3adba899abcabb54647811142e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W12020828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf440bdde2d0b9c8216c361656b267e1b8e0178ff4d03db744dbfe8e166d6b21a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FR9W12020830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f0590667d4784db517ed08748f739dc4f0a0ae89658ceb40ba1be6e6fa6ec. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRS182109301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56485afaa468e3ba7913d57e541a0ae25b05b8c8375684f4b7991e48a3667a8f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FRX282049249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887decb32c33c96c360d7ccfe46076c7762ea1aee650d9707175d2712cba596. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRX282049250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22a42ff7b6ffc701d1dd804b158aaa8eab21e767a070f54d72c64ba64cb871. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/UKN6K2003684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6cc9cf29960005047e59323beb6adf3f16298762cf9d5eb0c22f7edabeb557. 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/FRX452249580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b2b65ff9c4336cffd24c0154908c7af19881209bc580b092172b5ce2111ccd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM4TX2363340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d34525f90a3f2561a95da27abcaaf0e021eaa3b9d82091e7ead57da3d85047. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2388265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6510efe00346af72290a66a1a091689354bd48c958005171db5ae89273f3e14. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM4TW2388203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf2587f2787deaf24b996509b8cceb3c6afb6373f826339303b600593f2e4a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKZGC2402435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2deee5b511575e53528939af7c8c7faba62e0ead1a9c82c90bac101685bd3. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/UKZGC2410438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f3842e3c314be8b1431b43802990988154ec7756f0c482ea4feab3d7274eb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/UKZGC2501168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ee1286592f0d5d577f4f0d1fecc7980bdef7a6aa517ad4e83f5533ed32162. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/UKZGC2506902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae149e73c01cb2f9dcb95203f92fd57d9300ca4fa9eb7562c2878b384a7912cf. 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/UKZGC2508222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2595fd34f32ffa850c303fc7df13e3258c50ab1c7c9327fd13dda862557d2f4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZGC2508251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b528623da2daddea13c68836a411d60c2ebb66896f90a7f288dc9cce596134. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR10S1904228.