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 0x6995308a7503dbd8eb3b25c5ec01b7cbc2c26dbb41ee2f4a45988a09793cd78f. 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/c6aaaced-3f6b-4d91-a8a5-ba57e8222a8e.json and https://artists.proofprofile.net/proofs/artist/c6aaaced-3f6b-4d91-a8a5-ba57e8222a8e.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 0xabc89500fd1821658a4702d09ef4817c97cb8ae3e223f838d92687b7397c6e97. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBLFP1760505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359d0187c74f552ee166fc70dab78c750ef9a87391ecd84e680e6b7b4d8b1d79. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP1799688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe17829c933332ad398844e5beb10f330e2ba18832e0bcb8eeff18e9e243b35c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBLFP1798723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345d70d9419eec4ae695f53b5214b1374c14e2d518492d350ae74b5d00497f4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBLFP1798749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e87aa4fbdd144477702dda6945ef98378667c2a0773a170646aadec65543f2f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLFP1798759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1567936471b629638a659a3a575651373194a1674a2a7a6f2e2b15c3a638e742. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLFP1840108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a03064d6dc9046e38ebb3db881496811086a0b70a09f059837e97acea80ae71. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP1840100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a073fd5d7d11f1dd72f49f6c932672bb8c0d16558049ffa61e4b6b5d7bbd1a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USLD91725415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3912f8a4ea5883098e4383a0c5412fb22af7ff1119a90b8f4d1cad8ae429252c. 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/USLD91725346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078ffcf2590cdfcb081867d3100d57695f156ab7769d163a9fed3f4752cd92c6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USLD91725347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a129ebf4a2122b84d67a20a8f2b1e16b87dd72017b7d00d8d1070882868da4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USLD91725349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6016f5237dec25f7733d7c163ccf4ddeea57c08688126f4ea4303d8c9de0735. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USLD91725350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21ff754a419d1f9b81b61a239d30dd1874d660e8a24859d668bed75bc0c5817. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USLD91725352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b06acdcda3917dde616063fa973b8ee556f37af6afe1997f5b2d58469764e7b. 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/TCAFC2087053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3d7f3765ff99f5bdbe88018224e89a554bc47c38516ec6f0ffe09c8b5a9c80. 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/TCAFF2088595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f6587b86e16ce27506527866a4e79d10f29593ded988c3f1d023e4cb1f8060. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAFM2177385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e83667ae3f91c1c0c12136478c6050bc9452ee81221b554034b4cf38a0d557. 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/TCAFM2177425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45959c4f3562a646bb9a9882ed6ed562a3e764b0d30999817b28ab1d4fb0cafa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB32284744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32d1205df7fc9222b09b9b452bd4619ae5491bcf8f0b3a824c3360a657fe541. 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/AUMEV2165919.