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 0xc0b2d36de508fe5ea3035e11f47596e2c7c298c9b3dc0fd6a8bd63fcbe23db7e. 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/9fd36cae-c1c7-48ed-82f4-0f379249c7b6.json and https://artists.proofprofile.net/proofs/artist/9fd36cae-c1c7-48ed-82f4-0f379249c7b6.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 0xf59864d4c6df6ace8fb16399a6d859e7bd21452923b055894c2871aadefc7c2f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ22359508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f82e2897c3a8ffb26c59fbb50f5ac05ecccf16ead29805947782ac2f1754f3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWV2282656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d854c46663e6098ef2b0fa81b0c7e470b5882de445edc172ad2ebfb2c58c16. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:49Z), 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/QZFYY2396482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30817a7d1edccfffeba3610c2a993fc97c88aa74d37ab219427aa3afec9f1c01. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:58Z), 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/QZNWZ2336488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fa82df3c04bab023fb736293ba85a977093cae391abd4a869140bee14bfe4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTB82384802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655659ddb3ad95177d1ea43b649390ec043c1ffdedafcf023f4661aa27028eb2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:09Z), 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/QZES62448598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d362358481b2fe48b11c2cbc2f23cd7377f2bf6694e901ebcc1f5de14ff4397. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAX2498175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386151604cd344f7b92d6aa8a227b0c5b60e731b1642cdb45b8451a69adea0d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES92599383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed39291926edec508427ea69c207fbb8c9c6960b4bb912d632c6fcb81b01e57. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6M2511555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed39291926edec508427ea69c207fbb8c9c6960b4bb912d632c6fcb81b01e57. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6M2511555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991822c8438698ca99befa4ebcc57dcd06e2e15b42574a79ace202c2b1fa86ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2515946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcd17fdfed163d7c4d85a36daccce2674ffaee37e3d9b699a8741d4d3d7cd13. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB72509623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7d60bf5eb89384a0f7ba676f3dbeb161afc405826c8034a0c4d0ece081536f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/UKZGC2508979.