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 0x8242b042ac63e03c29902e0866d54bd38b6d7aab37245e7b33bdd646a57d5770. 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/001171bb-04a9-4b56-97d9-cf8ae16f754b.json and https://artists.proofprofile.net/proofs/artist/001171bb-04a9-4b56-97d9-cf8ae16f754b.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 0xc4407f449b130ca4f603fb6b5186775ea036c08e8233cd1bf7443bdf48366c94. 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/BK4DA2416702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6cb7e1be4d5668374d737cad9803eb9a6ddd43e019ce5c6c1b9dbf8a3a16f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MXUM62400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131a00ae5f4f0de285402ab7c4440bfa3dc16a25ae2ad85cd26de688def0c89. 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/MXUM62400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41a4219136dc6e88bc89e4894b69f998ecd2d84b18ea4950c7981bfd032fd5b. 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/QMDA62398462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbccda02a43966b76cc27ff534927638644268118f2af19435b0e25e7493491b. 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/MXUM62300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb22f060008e015ecb5a2feb9972a14fc9f15c021f9b3e0329e7c9835e2b19. 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/MXUM62300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669ea8d7dee1626e92df819351e6eef24936acdfb1ac140aefc4b9abc4bf3017. 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/MXUM62300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e65fe4e5c8c726998e68d0e489db676dc4b0cd566554bbd2846577e983a3e76. 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/MXUM62300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb3730b842fb660653e85b57e7aca6c6742ba2d4130630715fa78e14190628. 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/MXUM62300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbccda02a43966b76cc27ff534927638644268118f2af19435b0e25e7493491b. 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/MXUM62300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb22f060008e015ecb5a2feb9972a14fc9f15c021f9b3e0329e7c9835e2b19. 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/MXUM62300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eab7a541b38133d8fe04a7c9a184c1eaf563578110b1a9da79100f13839b5c. 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/MXUM62300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0024fce95c001fb10720eb01acfb206ea6dd9e24ecb203d20c6e85ff620eb7b. 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/MXUM62200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1815237e265f72228d88c782acf90cb535af637e4c950f74de4c9cfc474951. 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/MXUM62300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9bdc8db0070859b3638955a38a0bcac6dd1ba211ba519fb95ec968e36396e6. 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/MXUM62300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd489538b087cba16ff91c31a0de68c011abffecb57313ef4f2aa7474f0994754. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MXUM62200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80043f3107ee5a8a3232865a3bfae90a34a7f5102ec981aac805c47f7fb63d33. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MXUM62300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9bdc8db0070859b3638955a38a0bcac6dd1ba211ba519fb95ec968e36396e6. 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/MXUM62300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd489538b087cba16ff91c31a0de68c011abffecb57313ef4f2aa7474f0994754. 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/MXUM62200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0024fce95c001fb10720eb01acfb206ea6dd9e24ecb203d20c6e85ff620eb7b. 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/MXUM62200051.