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 0x5094b4f85c0d2cadb12cf48dfb7f288df4f8d0d2d7d883c97a49afc1ac41b2ef. 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/182a589f-5dd0-4908-9742-e620fb0338ea.json and https://artists.proofprofile.net/proofs/artist/182a589f-5dd0-4908-9742-e620fb0338ea.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 0xc6ae147309a609577de1ed49001b7ae3ec7e1d4d80b265779cc5b006d1c2858f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOUM71900346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f8feda0c4adcc0c3b11bd56cda7fe66587ef012edcbc8aeb1f50c9f89f3cbc. 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/NOAGW2400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22be5e031eaca45f8848c474ba3a6272b2ea5fd12785bc1cd02689943769fc. 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/NOAJR1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58af0c61f37d4f3090e56e750c4ccb031bd36ff3282b7af76eb39382d0f7b03b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOAGW2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdee97cc68de74fa8fe1d3f5d7713c53b415000bf69f62730d10a1e3426efe9. 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/NOAAC2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21544e6746d6ca6c5121ee33590796aec6ce6b8ea734d86a57e39b244e9cb1fa. 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/NOAGW2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22be5e031eaca45f8848c474ba3a6272b2ea5fd12785bc1cd02689943769fc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOAJR1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943fbca8d2771725f68dbf264fce89f2631ec9b6d727451d6d7f76abc934dc7f. 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/NOHDL2205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe5bde112cb369698017bf0605add31124c310d7dfb373372f117feed23cd4f. 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/NOPJ72101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259d25f8dc33db0e21f214b799862bb6186ce42bc604ad3951b83db5db4aa39. 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/NOF182201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f5bc3ffef866d1351c07c7fd4e27acd5395a1cb6da9fc7a09a80e83105c5f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOUM71700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe5bde112cb369698017bf0605add31124c310d7dfb373372f117feed23cd4f. 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/NOPJ72101040.