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 0x3eaca9b7f1d923406d992ac9233a9b5e46c7bce58becc4ef9709f5012b6ac47e. 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/c58941d1-6745-406e-a2bf-71affdea65e9.json and https://artists.proofprofile.net/proofs/artist/c58941d1-6745-406e-a2bf-71affdea65e9.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 0xac2f9b604a0c142c69e6917958d2b7f94c450a04e23c2403e140974944d0603b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P1185782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4bbc6af192192c455ccf2b72b22c25bbd403bc2897f9f55fe38508b299cf35. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCABO1369253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4306c817dd3b08ae97dcb409223712123ffb608d05596757bc386f38e870a586. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCABO1369260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7934fdab7fe447d6ceb9219af4ffa9b38bc9d50d08de18f743e5308174e52a. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCABO1369270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a52f420df555711e35be922f65049663dca37251e9401a830a08cd85877402. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCABO1369272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc151611f509e85686682ea512de1e538cd3c62259c5fa1ba80334e680ef6ad. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCABO1369288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2f34d636a6c9845e70c9b56a2abc1d852c7cb3602e0c40514a9b34fcc874d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABO1369291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab46099146ef1f3559fb22fb7eaa6e1d9747a8dc944165169652893142ee446. 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/TCABO1369293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ca318c16fbb2c078b5681f5ef7eeaea64fab9db1c31a1cd3511795f66d37f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCABO1369294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea39195b6379b149ca57ddee0d2b951e49fba23bedff374fdd83d2c4db69c0c. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/TCABO1369297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660e3018f95b4592847e326be3f134528d4ddee50da9a7cb3f5b8b3d112bbb32. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGH1670688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1c2c07b55183118457c33dea98d6c847b0cdbddef725560130ab373f4e92bc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH1670689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d34db922837f52ce223e4341b5d4967df6f6b6ac8d3d51f7141f73262f2d3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USCGH1670690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2a1c515a6df302d93bdf65470581c4f21cff96e7f908f23094c33554bf7040. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ1817293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761b9e0d041e9636af0432384da59bc973a7343b1b7d6f779429fef82e48c913. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ1817295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722f54f14da07dc94b7e91c0cfe3d047a15771f625eced75a6ae44494c80f886. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USL4Q1860411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38b748ae6be5c048c1bb956b221e1fb59936cee960f9a2c304313a0fa8f6c1b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ1994984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c35ca806155122645d1c30817e62d7d42f82653c895974166b522f83d8367. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM91909237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a46f676be4ec6a3154a0037f3b7ff32a5705063576fc152b35eedb9b7a995. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMBZ92254002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8941dcef5675536de87b6954be9bcd3784e845b6a65a187a9478123e4260d814. 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/QMBZ92254004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca82e0cf9a9ffc410839356b0f0ac1f43c42d6688fc82aa989bc87d51c37d74. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMBZ92254006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ca134c29fcd53c04a1ed3ceec77e81c5fcfb9b823c4408e86765f52b713d0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMBZ92254007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd1b430b1ff3d78d20693fd24249cba9633e444c121470fd6703d11d6820e87. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMBZ92254009.