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 0x0881ad99e66f626c069034be8ce03458f1a2dd896fff1a4e7d07d86e43fb0672. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9d6925a-aba8-4801-b97f-d5f8e7ef518a.json and https://artists.proofprofile.net/proofs/artist/b9d6925a-aba8-4801-b97f-d5f8e7ef518a.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 0xa58538662aecf4a90363bba7aced9aedfb2869725c7f3eadcf7977356fd7877c. 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/USQX92103984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29184f1710acb728231f42c88972cea504fd73caf186c6613ad7aa20a705402c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLD91736389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9152e27bbaf7f64cdd19fafcf859b288395de38d91989a781945098d150ee. 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/QZMEN2348525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8abe7c7d63af800c72c6d6b5d033276fe6ff8915be615f12817aa95db72585. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USLD91736297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29184f1710acb728231f42c88972cea504fd73caf186c6613ad7aa20a705402c. 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/USLD91736389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3fe4a78cb169e29f28604b04d7e7073b9ba434d7ef59fe2cecfd9d65df3589. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLD91737266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f241a0d43824a98cd0a2790fe468c6f54544367e1c5e410c3d88e6f2abd43d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91737267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5249c2f7b2c0d4b2afc767b3a80c727928ba50adc8e7079775ce0eaffcf93e83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91737269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58fef9aa933e0b1c9336a25fad51259a4a8efe36b36196625a4348deafdc0b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91737001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f06b5946c25f2a0c8f9f69fdfb133e266e235b527983481f19d01a1329e1ed. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USLD91737157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b250da2759373740e0b43d8199a9cda2a99b672f46e8c020ac8a4bd65c957e. 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/QZNMY2276775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e820b6d80755bfd65141a0ffc0e0e9a7ce13fc2b7b11d8e7192d4ae8af480d. 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/USA2P2243344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dd85f4fc935d74ab3327ba4faace5c4761c32e518f860bfb0c1785f37b9679. 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/USLD91739590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c2387b39e6fdfbd91fff28e24f2d6fb5d9de74420482526098dac5684063b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91735850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13ad6a6ee11bc58c35387bf2a06cb102967bfaf5da4c3c015be7b901f8b1bf7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2P2132112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa6319f7067700e32ea0c8cb0169084fb226fda9b15d96d2e6be5a1bc05ab88. 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/QZMEM2136276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6efa6821771e0a614046380b01ce21967a87510513208b6c1823a22a520b5. 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/QZK6N2434775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f886ec00829a18d37f46d146abef11d011e22fe221f8bee2170bb4350abc197. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BK4DA2413774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7206628bf56cf8c122a302eeb4fb8371ef0bb07d780517fd05020f6c28adde. 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/USLD91732941.