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 0xc4d293e74abb34f948bfb5dc241f274012c5e3cb0753befc3f2377f55ae5b89b. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dac4b1e-d91f-4760-a676-eca9473e2339.json and https://artists.proofprofile.net/proofs/artist/2dac4b1e-d91f-4760-a676-eca9473e2339.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 0xe6b60a149c2e32b342efe4bf00ac5fd17c380f1ec30fe1a31ba26b5a95edde40. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZNWV2462858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4783a92a7e3016a342f49745166087c23a063c83fcda756f0c78bdbd4a0ecaa6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZNWW2436431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfed883f5e880914ed2e6576196fd62415c13bd8cfb1599f409133d92c3ef6b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZNWW2436385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef478112c565a7b133fcbc34178ae8a8ab18a95d7aeb2cb35d3939a74d6ccb0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWW2436433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7434da6749c05580d5d4a88a4ddd211bd1ae80f94d816cc3f57731a67ac828f. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZNWW2436435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92b5471c1938f7bbc4da11d8146819303a2b075b0af6af19e3d4ed00617ff3c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZNWW2436436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e45de81b57bf6d584ae6dd5218cee8554b2d10bc2e3b86e3e672ab788665ca. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZNWW2436437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534bc782780339d19753912f5a11601c42d565eed977c86e3088162e92b97d55. 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/QZNWW2432830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfab7662ed95350d0e243557f1193abc55d132f2ca8b3eaf1b544dd5d7d8cada. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US94P2220901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5253cd847b8bfeb6b5dd4ddbcad595aea210f83a3248cd623e20f821c4449c11. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US94P2220902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9ea7499201831cb04b99c097b38e842b7044a3f8eced0b4e2f6fa3d7a0f3f0. 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/US94P2220903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e352854ca2f87e28d4faf8bd45455205c944620525e3d92ca256ba42f165a. 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/US94P2220905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6f6fae696b7030fb38591d93bb15130fcd50da69e50311935aa0a3c6c54fda. 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/US94P2220906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4bd45b668fa3ec6309098536d56fa494b5cb906bede053d0ba77239076cd33. 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/US94P2019701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941c5badabfe90829ea3898c3435eaee2e1992ec696436627fd684a2e7c43219. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US94P2019702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe393a2fa7782e75680a5fd5e1da536ed7e30d442ba8d1766aaa08fb2b1f96d45. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US94P2019703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43d219c5f7ec17d195780aa8fd53b67bef7326ca302eb10b8acdfd5810e3b45. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US94P2019704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210267d7809105127dc66379668780ab72745af23062c3b792252d5d280a4c40. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US94P2019705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4e5f79f3fc96d6752c727d2efe6d01d620acdf4d2f04101fbf7131e88ff6fc. 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/US94P1717102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dabcd0f419087af55879091789d725d7f1e99aeb595c2f51183d2cbe4dbe82. 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/US94P1717106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534bc782780339d19753912f5a11601c42d565eed977c86e3088162e92b97d55. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWW2432830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b60a149c2e32b342efe4bf00ac5fd17c380f1ec30fe1a31ba26b5a95edde40. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWV2462858.