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 0x79a27d6b6f1a46a58528354a668fad61f68d164bd4f91ed29ceaf8cf5961a6d7. 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/8be4dffa-1671-400a-ab18-c8d286c3ff4c.json and https://artists.proofprofile.net/proofs/artist/8be4dffa-1671-400a-ab18-c8d286c3ff4c.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 0xbe23bbd3c579e7926d0d441fbbda81faec0503d79b954ea9910921148d4def20. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:24Z), 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/FR0U91601513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43f16128fb3f4db706ce8694b14d006f365275b31f47fc070670333b125c8b1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR0U91601767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20337a3bb8bed3505dee7133e4b1e7d533d1773a73da4b5de71d979c4d87c067. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR0U91601289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd904fb6d1076a83a6564c50fe423428eef7136b6d4e7c7811caa2ee05dda6cff. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR0U91601771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80458085a08a25c2f62c5ed70c291898912bb905a6ec292df7cd1abd884284d9. 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/FR0U91601682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a347b418d9a048d6e4d3830e4688ba93f4291958e642e04ab8b8493d310a70e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR0U91701180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09affd02d75062ed77ccfeff71b78b40a38f3c5e3973dce2866b9b41d224f2c9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR96X2034847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dec3dab768b32503b3b72545913c370fae432a3d75eb850df277d2604010d7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX201958913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0049896c9e8ffe6189bdfedf001f77b3a3fa2903e6e3560b61a1ce48e4c184c. 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/FR0U91900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f87cef5827d43797b4503358c03addcd795983f3d74f100ecd0d22feec2473c. 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/FR96X2034850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb67c15ffc850bf5ce84a31b325b89f50235dc6d16ddfa96335a5e2bc6ca198. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:30:26Z), 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/FRX762160331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f91b2f6942c9ea39eb7be8f71899867a38675066b0f2e190974599c5330ea04. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:46Z), 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/DGA062222710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1602da640f7b9ae0974ac5edfe6df1177b54670362d026d3fb2f912f5fbd7dc0. 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/QZ4JJ1619832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750aa6b71f93e47899dca761a90e1803b1645dbfc1c55e0583da35b2879dbe7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX762125253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab3960f83171924337bfc7e360c3569b6016bca56525ff40c8c36e1cca4b82. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR9W11415392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750aa6b71f93e47899dca761a90e1803b1645dbfc1c55e0583da35b2879dbe7. 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/FRX762125253.