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 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 0x92f74107e85d99911e97e09ce264bbb4906bc22f152f8b80839b056f3b1c54be. 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/5af5d32d-63fc-4b89-b415-f42f5f46c4ca.json and https://artists.proofprofile.net/proofs/artist/5af5d32d-63fc-4b89-b415-f42f5f46c4ca.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 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 0xf0c029ec2a4c0fd6708e319225445fab2579500d39bae59a1c6897b1be744c4d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SE62M2109774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45480e52e6df632c326b7df3e0c777cfd8b96215cb9f4e7ac838ab0905a9b407. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5752220172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967dd6185599533d59a113fcb1aa03e18fa398b785196dac2f1b4acde3d88e09. 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/SE5752220173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b85a032a51cabd4f31f2c7a417b9b45ca2c100b30602d8ecbe55b84b989e8a9. 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/SE5752220174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4754d75708e047482caef5783e2c2b77c955eef9386d046c88e3e336c60f9e1. 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/SE5752220175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cb1c7b7aa6e75077fb409cbc6c52b7e015dc91ea7c604fdd5ce7ce967399e5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5BU2396993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16488c5636bfb27839c4bd2b35c2c072e3b492f4d7ffed90d5b9b3481a055b14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6QE2412491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe078e225b254f25e2aab028da45f67fdf4e390f9de28a5f16575e468a048b9bf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:09Z), 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/SE5BU2438928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a864ab63a380b7410c9f196e40ff5cf03b474fe1b6c008ab51ba384b472d4b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:51:25Z), 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/SE6HN2437037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7117de72e2e989401fb555336541518eea98c39366e0462868c801524a6d9c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6HN2443822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b40516e57338e639b136c690e05c28ffc04ea71cf30f9f0925d823775323c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SE6I32461725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c2b41cde4c838278f052e1b1abe1534b9606ed9a5cb02709f6d24196a8b8a. 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/SE5BU2585423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda896b0750220eb0ddc4c68581ea52afe38958f736d67f3c3d55bf129f0ce754. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5BU2585424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7593e87124465ff865d4aac510332e7f539c89f96f71cceb030cc7449c3e1a7c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:00:17Z), 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/SE6XX2503714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4bde11938e82b3bb9c02d2204f48d9ddc56ea5e1b3f5f8796f217010537b2c. 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/SE6XX2508734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e20f7e531b1055e9784fa62754103388f904966a84634f24f934ade5b9977. 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/FRX282140854.