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 0xab783776977d589f04f1d85c15f50056c29b835758e25e8fceb25007523d4e15. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7e8efca-aba4-48af-8dd3-feeec882bdc3.json and https://artists.proofprofile.net/proofs/artist/f7e8efca-aba4-48af-8dd3-feeec882bdc3.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 0xaf6b54ca9ed117b89fe9d3daa767d4fefe23fd61f5899ac6f76d4967ccb1a3a7. 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/QM6N21803847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe491c5f3cab3a45759f9b38b45870f7b9c216b0d9c9781f7c399adb606105f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N21803777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74424c1bf8c98d7b8455275de35dfe513e805916bb776da940aaa3158de4424. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM4TX1962194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaca9ce96fb26b1b71f674139cdb2959c2d93aaaa314937d37bbab2f8ac8e28. 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/QM4TX1962196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512d70eb8ac4637381b24ca8795ee28c9f157b599f8e0580f3ed6312e6fc137. 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/QM4TX1962201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc62fc22542a400f519337a8632b3d07436d64e4fad542dad47a287f5b97fd87. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AR8TN1900552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79057dc27a36216c78bdb64c54e22330e197862319af4d1b4a7ed515b7d3bc5d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AR8TN1900546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9484a2cca13fa157e2fef67d5f4ec3ac0e05b7def45d6b4ff7f12e8194512. 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/AR8TN1900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3055daa52d645c530e0abec51ec4256f53d4ac371bf39530bd3e956665250d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/AR8TN1900592.
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 0xc03254faff57a0d868f90c57baade79293d15e03ba45a721a92f91e938074561. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/AR8TN2000441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b2f8500f84ec29e137392c763e452136bf4d6d39cc48565960210b4729fd7. 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/AR8TN2100559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ada1a716d6eb3aab4865bd2ac081f3dc949d9b51d4af3eac4c7714f83ae73e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ52287155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70557afdf891e7f084ff5e7ae70a94f0ba3f77ef48c668db587609e945d8699. 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/DGA0H2313621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92c944d603833bd46d91b582a4c84ec80028c838111adc3a0a5e6be13a63cb. 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/DGA0H2313622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433590ba191fbdc5e94ca9e02d6917237564729957f87110e7dd8312b3dfbb0c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DGA0H2313626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec544a09a2f39ec7216057eaee629bc69a21de5ba9dd0e31c3941fb8fe4344. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DGA0H2313628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4d6f3e8025ba3c2f08fc6be51aeb8c05a64a45ecf2bd1394d31dde5c15c05e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR2X42592183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf368c450701b9ce334833f269c2fc3ff92dc906a17a691eb9c078df8a2fae28. 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/FR2X42524864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4f47b64d2744932026d819a776d7c07e53dbd5bede9a63923b27edd93c5fec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR5IR1800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed8154adc7664e1d8c8b2179c4753ae30a7b358a4cf899de27bd8a1fe66fe0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AR8TN2100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943fd12bd445a16df969c35e3f5a0b1c520183e5d130bb85b5b75cd099048df. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ5AB2343897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba5f92c3c7c3ac196b47c168678afbd86116b75db237edc730c16f0fc9cb00. 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/QZ5AB2343899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c92c7b21288b93adb4aa104041a23943d823a95e5d992dad52f00e81ee29d4. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/AR8TN1900575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ff1827671cf65ac79920804702b159a3d389c24642e884a67a257d125cd7e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/AR8TN2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52ea4e5458bb22b8f7a5e1aa0af7a4cfd11b66c038ba691f1c47d30fa73e7f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/AR8TN2100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3cb8d3555bd4e6309f419d4fb1d6db32f586ff8faf18b546e2b8216c1318fb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZW9K2296897.