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 0x052f916445635635fffd5f8f01889eda1698c6aea7b3b41d5424cab47052c70d. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8321ef8-72a3-494f-9c7c-62cae08c481f.json and https://artists.proofprofile.net/proofs/artist/a8321ef8-72a3-494f-9c7c-62cae08c481f.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 0x74d082f9ef9813104c480a24c537c73cb4d1add70e340ce1f83fc7b86b927880. 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/QZDA52588260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf121bea8e3d2132c2f30c58daf893d5459be39af78bb065fc3c2d94bffb4cccf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:36Z), 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/QZDA62593417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deb149b0d2c005b8feaf35af3ee7254d4666b2380ff1f2c60a79f05ede42ab0. 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/QZES62546957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ec213572a246d9a4fe5ac16fa6141516cba05f414e42d970e5ccd72461429d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:04Z), 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/QZES82508508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd7e42a1d09d6e4f408e9eb3c493f944be5a46524f49997f1cd341af9a38380. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:13Z), 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/QZHN52519103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8485800212559d774a23332df0cab40eb907d559e3fab0b732d779266065cbf. 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/QZHNC2590775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3512811f39369866c1788e8f368fb16c8fecc13052e6b9cbdb36092aa9a1bfb7. 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/QZK6N2581072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f688a73b9643c6eee330f57f21f973e735433f58bcc0775ab05aefdd35a4c4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:27Z), 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/QZK6K2563834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a0c196e7c45ac4decd68abe36f6361dc6f32cdf3c2d28a3fdf8cc1480e4a54. 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/QZK6H2599052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83b90e8216fe01c83bdf96abf0729f86846871042c5090d5152536213d3b472. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWW2579379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834a8adb5c85e5c3f74b5dbe81b07f5919fe045148b6e069dcdfac0d1532df29. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZPLR2570271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4f67d7234bc79f1264220e33f40c5bfbf75e53dcc09075f3fdad64bb7d62a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:36Z), 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/QZRP52568137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d40d16c8996194b7911f54ee78fb5502632f9a950398f80b2b58e7cac43c8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAU2597089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1899f5ae3464806c180be6174e11a09478ab726f98e870fc098baa0dfad79591. 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/QZTAY2575786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c1d112f68cf359356886446304d3a9a1f1c3c3a0334416802654c0439ef456. 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/QZTB42555032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc042d96d94b3353f0b1f1d93e4974ce780f1a3b7737e493d60fdc30e646babaf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB72553519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafbeab103c29345325f17880b02bd4132472fc39fee440ca5cb805c2422bf68. 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/QZTBD2537006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2478d36b2c2d9aef4d65de51ffb4ee4ea8e7240e6fbbdebfbbe476cdca3a3e. 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/QZWFH2582228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af38658595b3b544bba56eec2c809168ec4225243033751304c1f461621cda0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFM2561485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4017d53f5feab46d92633cf5a20c35e391fc74a1251ffbc63e59673c9a7fbb11. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:31Z), 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/QZWFU2514101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0be14bcbd4fc192cc96171cc45e95a23bdcd6eadf67d65f523c55824c4ec314. 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/QZZ7N2519920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5b95cecd09dc81d7c6f50a494729e292b7d9cbeb6ff622b45fd49f43d79f38. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7U2587175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6a52aed0e63529b38dc1c3274757197701e9746cdec58159975070b687d31e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F32528947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5040c9e2ea1b6fb9ad420ec7e0b40e566170253d3228b6ad26b1f4dbb37f4ba4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:09:15Z), 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/QT3F72541407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe8a3e53577d9462307483509251a308908da2cfa69fabad77d3cb307bded5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3FA2594431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9536ecf114867c57ad42d320b250470170548e59cac3d78c662b783025bcda4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:13Z), 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/QT3FF2537403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ef5622512df6af24b5d4ab9c67c6be52985da85f64a7b5ae7306463ad12b7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:07Z), 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/QT6E62537665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8e84606007ac8acdf56f300ddbd33f2dd853129945ebd3b6d26a1d4d90866b. 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/QT6EF2533820.