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 0x6891c1e4812b600fa2abb5da3d7d6014c6db7006dbe3a8b19b07b36997250218. 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/6bad4480-c51b-4067-852b-8e8ab25756f8.json and https://artists.proofprofile.net/proofs/artist/6bad4480-c51b-4067-852b-8e8ab25756f8.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 0xd44a81f25368075a932df0b4b38e01e9ead19debd26d1ab2a0f06af2abc2f0b3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US8D61400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38eb05d987d95bd3c43de6d2e7353f53f702d00c57c8ca53564131900487b73. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US3DF1722177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236f4fa109b28bfe9d644cf1051e3d41e79e64a9706751790805487cf29d761. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF1722179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e10c46533d419d4616db9ca40f56858dc7e9b2d1652c68d5f237dd00496d29. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5BU1932730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba1f20de501be7d89375f42d3f868e9f1204313c191d008740a58fd3f04037. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USANG2029242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba1f20de501be7d89375f42d3f868e9f1204313c191d008740a58fd3f04037. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:57:39Z), 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/USANG2029242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1f2b8cfb8247ccf175ba0ebfaa89df78538493f9773d332ef9ce713e5a26d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USANG2029240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0484d1397f0eca31ccd8cb75eb022ffb724a37e249cc94c1fb301a9af5f02b9f. 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/US3DF1708328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a3a117404c118d269028527c8d381a154eb2859b9b2e0bd018e93d90001fe2. 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/QZTRX2125228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259287a37f18810fdf5add3754550f88140fbd44d07852c2e7552629108cbaec. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:55:22Z), 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/QZDA82243649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe3931e1cf7e58fb4b20cdd0d6dc61a8c95e8fc1b0e8793d1814c3b921573f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZ5FN2294960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd47c87efcdb47c22d62e4115a205eb9b13d1c85cf3f3ee33e7934da8d2b52df. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USLZJ2230355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b34d8f1d4c31069accc531024236bc2cb8bd1fe4db4337a8a7e5ee624e3c89. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USLZJ2284972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa503134ec0a381820913ceb000e6cfda7fb369fbcc8d5a48e7f0d440525835cc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM24S2302115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28c7ad2e9bb59240071b4fab68ca0c54e01ff0dccd62a7a00d5d83891650e22. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM24S2302579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ab3d568771fb09e1edec416c808492b639a180d3982b176044fe470332533. 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/QM24S2304300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07080d1870ac5e149911000cba9084b7833b0aff59d7d532e17fb017c393cb29. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZY7Y2300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f0d3d287f94c1175791bb6e06bef48504a08feb7ae9b67a2ec950e0d2a25ea. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:59Z), 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/US3DF1712295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af1b83d4947291306adb87cc009be6d58fe701498a94c20cb9b47aa1183b525. 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/QZWV32530627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caa3a3f83248c88289b3a4877eb760c0bece46210cada0e0874c72cffbc3671. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USBAC1010057.