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 0xf3bc20234c9fdd53872996db688538bf74ffe2e0d014a0585e4d6df65a24c62c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d4949fc-a866-4655-8ba8-33468f3f8f9b.json and https://artists.proofprofile.net/proofs/artist/4d4949fc-a866-4655-8ba8-33468f3f8f9b.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 0x85dd85dbee8e1f715a520329a797e7993fd904452b1c571cd36457e26e49af80. 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/DEL212310199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf215e3384054d3e97c01228eaabce5a30e96e479ea9269412f9c39579aa686c9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEL212310202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba3cf4982fa538049cb75d5fe329873a53544a5a6b3be902ee8f744ce37f20b. 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/DEL212310204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617e01c7b10ae8e4dfe9eb5dbd29ae9cae2848d1af600348c8562fbfce71fd0e. 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/DEL211800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a3ab2546bfc1e30d21cd4b08c81a05c9383f2e7ee6f6e56459df97f7021a9d. 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/DEL211800469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1b8644425f63b2a937c2d02453becf8089ad2d0d15da573545e6c1d6b2356a. 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/DEL211800470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65ca86a2b16b8aaae636aeefc8ef59a5c6b21121e8863b417866585f2a656b. 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/DEL211800471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b4a86524ed89c023d2d603391467ce530e5ddc3be39b2a4651105229a79b81. 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/DEL211800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c11640be00c07a9f903eb54b4b71c5acf5f134288d0319be54e025dfdb91571. 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/DEL211800473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d517f1eaa395666b34819eae5e7a55c646d462394b2b82941ca87f1c0dcf3ac. 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/DEL211800474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d41159de2df67e5c3825db589e9eb730d82aa00b9c7ff94ac84589dedafc9. 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/DEL211800475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a11603072773bc683d991de49b4a9611ab5d44fe4b55990cc5111afadbf982. 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/DEL211800476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dd85dbee8e1f715a520329a797e7993fd904452b1c571cd36457e26e49af80. 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/DEL212310199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28667ed02bb4dd06ed21f7592964f4282151d82235e3308834f9a4a96353cb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEL211900772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae1bc08eb9f228709964a4459d216fa34d9b775052eb664db8dcc33b5f5efb0. 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/DEL211900773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd30a481fe3a9ff1138276ce687c2577a073bc758832f36923504f9c16c24be. 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/DEL211900774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebb95ef2b0b4a874bfd8d3f2af14458f2c9aa27f4e8a4f13f0ce9bd06ec654f. 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/DEL211900776.