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 0xb25b0d5abf1ad89f4072b1c9332aacf5b064ec2d1f836b5dccf9ae76f97c6d47. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92ea8465-25b1-4f5e-a49d-1e48d19e5600.json and https://artists.proofprofile.net/proofs/artist/92ea8465-25b1-4f5e-a49d-1e48d19e5600.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 0x4ceb7f7f93de171dd669b25c0a602080682b8fd9b4fbcb46dfdd54d15b8f1f67. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAJB2465021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82e102c6737d3082c168b853e3f85cafa39c7d7122129ffab1513be5ed23c10. 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/TCAJB2465023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28cf8ef6cede900b1335a13f24cb1b54ae8e0174ddf333537035e3cdc2e38ea. 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/TCAJB2465025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707f1231f0b0b03d78815e3475294c132a7010af97fd700cc99663c0fddce637. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAJC2465027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb47bbb98632a6946653e36bded93ed99ff83b7a9a87496e96b1faa21516c9b8. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAJB2465031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4725b1eb1f8c73147e67ad7d115f8bb78e35298d7b64ce5eec76c96e452352ab. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAJB2465034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60249f6a055073bf1c8a1d3e2b9ef6fe04b121be78c5f0b858fff44612762f9a. 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/TCAJB2465036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f5a7eb31a345a29cd598b03abc7142ee4c2c8a62dce900520c7d4f1e32805b. 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/TCAJB2465039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4867516512a23d45f0a081b4db1799103bfa110d88f62b989b0ea16e41fe06. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAJC2465042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe781b405171c57a2dcf1c753ded06e59869fbd23d669c95b30c66d443e92d3ea. 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/TCAJB2465045.