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 0x1e00ccb28566d76e725beb44558f35927c39434651c89bef61a21a54b7fbdbbe. 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/c323d0fd-f9d1-499b-9c31-bec2401e5fef.json and https://artists.proofprofile.net/proofs/artist/c323d0fd-f9d1-499b-9c31-bec2401e5fef.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 0xc7c35c1d030e1e5808f1e1cc67a8db2a36b95011de823abd3251c3acc6113aea. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1548452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e0abcc2afffe6863f3291a32997558676ec3dd5c5e50d2a5d5b58af8769a8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6DC1548457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d285ab7e41b5950c65fd6456f25af9e7f22b7c9c7a94b2c03455cbe70c83641. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6DC1548462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2933086e31ec9e8bff78df6258d99e73b9707929c681c37563623ba1f5a4da. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QM6DC1548468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c35c1d030e1e5808f1e1cc67a8db2a36b95011de823abd3251c3acc6113aea. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM6DC1548452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e0abcc2afffe6863f3291a32997558676ec3dd5c5e50d2a5d5b58af8769a8. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM6DC1548457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2933086e31ec9e8bff78df6258d99e73b9707929c681c37563623ba1f5a4da. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6DC1548468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cef43ebcc5ea2a5f3aaeebd6aa776e1644f6b81950f59fabe659edfa6cb36f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDHM1828769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490b7be40a0cec21a1f4cfd9abf7104dfc557ee2c2f6535d06828cfffa51d627. 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/QM6P42037692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d04f3a1b93e9c9d074e2c15ea642b0d21a10839063ccdb3084085ac566a09b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM6P42037693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a593330753fa10a3791a223bfe26be5f620b4eea56eb37593c120b9bfa9d75. 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/QM6P42037694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9b0fdb615a098854ffde4677913735c62c3dd19a9f92cbea41e3b1b34862db. 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/QM6P42037695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f95ebb6abcf0b93c4079b10d8c670b750cf804c8275bb131a1efd05646c9127. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QM6P42037696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2f60b8819f06e4eac014e87e2f31f8cd4cb24782e8d16149743fda49000ce9. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QM6P42037697.
Como En Los Buenos Tiempos (Version Mexico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9dcf49665953d1c80d3a9319f4cedd0d89f2b1881c5a2deab5f6e956aec26a. 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/MXUM71100115.