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 0x8e1b41423b069de7fd7d5e261033649dca4fef397df0368834ec15ba23c9eedd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c559b952-95c3-44f0-bf88-d8987a233529.json and https://artists.proofprofile.net/proofs/artist/c559b952-95c3-44f0-bf88-d8987a233529.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 0xb66d1ee97c63749b3aedd02c6cd5db5bdd94b5e420ca8a053eaf48d8b4a6a3d6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/INM431100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a2de5463d9bd8d8462c3cc3895b220442ec58e4673d6917d164ded96fb86e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/INM431100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eae794687ccc5899051b60bd983d5ce6e52f42b4866a0a155d7b86967e2c78b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/INM431100638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd058a999ccfe4746f30379b352ceb02255a177a5149025188467729c460487ae. 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/INM431100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a4a453b9c83dfe81adaeab07456245028b8eb15c47ef0cbb167979ffe87d14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS181009747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126385a0ad60114ea735bd92393b5be9c98a2bd24d46ffcabd00852e6a7bf5a6. 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/INS181009748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f5cf3c8503ce562c0a48a2f2eb9b1bc1ed5848e1840f64d009296d279597d. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/INS181009750.
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 0xc09a7b3b0af2f66e92ef03cce9a5b1015219e6fb8413099b21c38274032646ac. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/INS181009751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c6441a37eae907d238bfcbce494197486f2f29f0d362e59577bf7df331e31a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/INS181009752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7cf10732280ad31c667e266528e1cdd9e49c077536934f545d9f98db46c710. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INS181009753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b11d128420bc2cc35b8ae7ad376471c53ccca8c7270a2a366ad9eba8ef0736. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/INS181009754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef158eb422664c8779119bb1c3a939a33655a4c39a63f5b82b7ad57538fbd2da. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/INS181009755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d635f7f82bfdec4de7c6c7cc0d4853534b60a5be83197431d3f005b45b6ea65. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INM431101378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a8dbcaa8728a8cbec6bc21839429a8b6bac31e0309cc187b5561807f1c820. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INM231400764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df3c9bf28e0d2766815dfbde9878230c6aac34be71432d41ed86c616624889e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/INM231400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60990279b081cd1745ac2c36aaf41da4741d01cd574e2b82a23e310094cec9aa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:25Z), 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/INM231600591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f5301928b79192eb748c3568519a6c68e333a22ae3743d0ee6cc79324bbdc8. 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/INE182211666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdab87c1f8275a347d42185094d0c9cd7d75a55e85b967360eb0d47442f3795. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:32:30Z), 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/INP532200113.