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 0x1dcc6da534d19b8d4ee8df752f7c9f2d665d2f244a3953f5ecae28b1a1cb25c6. 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/c868d1f8-3eca-4658-a6cb-b617e1ee3155.json and https://artists.proofprofile.net/proofs/artist/c868d1f8-3eca-4658-a6cb-b617e1ee3155.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 0xdf49a03faa6261d9eca30fc0b3ee775bb927d9d03000797fd1ccb978342d324b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:17Z), 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/USQY51463195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240003b21ba07b183f3dbb7587ef67da4f37c3c1654b6bd9caa5da6e1fb5c67. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:46Z), 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/USQY51463196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ec4ded4703568a11225490c3421aebc6c861c0362f95d0351ac2d0d600e75. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:07:27Z), 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/USQY51463200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c0bfa2dbb71e1af343a501e999dfc4b6e9fda1e57ed1253ebbc780537f704. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:04Z), 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/BGA471703457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6da6bcbf63ccd628980f258b9932c75ba20c9bbcea8adce71ed61aa16800a7e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEYOK1806224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec788561b891a345c1f9b5de3d09428c1a231baaf706366de0e61309aec8ec. 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/QZAAJ2102944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447c8ceca3b4aad31d422f6cd9c88e0f99569470471be358c4dc0974f0a97e1f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZC5T2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c31d6b3ec3cba23c70030e5ba7cdeb00498d1803aeca212f1fc3d12f65e0ebc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZGC2407459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb7492ba1fd9e961bb888078a9ac399db869ba5b57e227863419eb3217a3b4e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKZGC2407462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626b24450c6c853ecaa9eb792797df84c97bd6a463beba9fbee77204cedd7b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKZGC2407469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6972a9028c08bc6ff9482660f92cb52e8fd7078c52defea86f870b8c595bf9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZGC2407460.
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 0x03442578fb394e2b9d8cfdb93da04af68d4cef678d89c83ea8fe808c9ec2f15e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKZGC2407461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ff8a6ac2c384f0e60f804f04bf8b4a5e24afa7f5ea3b3bcf061b0b2e5016b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKZGC2407463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53537e5138cdea6ad52e69e2fbf0b14ceb4a833286be5a79f07ab9ca02120d72. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKZGC2407464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd32d8d78a4e69428e1291fb381f36d0a2f1060dd0979fbdd5c4df1bb7bdd709. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKZGC2407465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea441e10b687fabd73fcd967ae55af583496344ffc8f1f7606f47a6553dc31cd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKZGC2407466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8368c7799cfc667a5b4e6797c07996f8243cca84b3e7970762d7d3b4f6dbd262. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UKZGC2407467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a4bdddc7cfd965785aa041250c2e31428ca757ea644782d30bebad685c089. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKZGC2407468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70833c13d459dd7e3740c5d650b1c73bd8086d90372b03c224ac61a392f1cc19. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKZGC2508061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e7fc5a8d1e5008a1dd344dc91def1d385b41ec83ff1a3974b04de8cde9b72. 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/USQY51548871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28544475d05d631862c283d403d3a8ae17db5224fc0dfadaf9b967d23155b5c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USWS42430701.