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 0xa9d07fa04a2d86fa0243e8806d2f5fffdc87efb3b4dcb56f5e3e9648babb23a4. 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/6608bc75-0b46-4832-be79-bf98221362f8.json and https://artists.proofprofile.net/proofs/artist/6608bc75-0b46-4832-be79-bf98221362f8.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 0xe1ce28357e25f0d14a8ba82a27c4669f1fe22f81a8cbb168d0b751b38d308683. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM3DF2163717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3588cc22b933b06446d061f78f48143e181f59be93024114acf2658b479dbd10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ41903425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a59af79106439caa881220d4d5c035c2d11f6f7d5c0438f220da8b6dded05c. 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/USANG2407774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3fbc04b908d3f26f7fa3c88c07e84fdcb9b1c7082545e03929e65ec26939f3. 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/USANG2407775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac65d7ea63eab8230030465a5424f1cb8e594d07e6145fac7454db2e2f774a91. 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/USANG2413093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9059112aa79e7aca3a8122fb8a4ff94789e5014fcda98de585b5b5e9d8d42c9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2413086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16e2fdecf77ae3e7cdf586d05a30dd9db3a349250490a525c211a356616d25a. 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/US3DF2494475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c347956c99443c33d3d6533d5fcede7229be8fee7aa5d8a5bee3927df2b6916. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/US3DF2453339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb286360cfcbd6d48c71f3a8b7633df664e6fc3fa6f3e6e6f584d829bcf5c1e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US3DF2416218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbb7a05607db34b3f790fff3064ad6b62e61cc438a61878a1cd4933ff838162. 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/US3DF2418243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aa5e0f29638bb89dc30c595309b4fbde2193aa833532848ad2236fd455771f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKLFO2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb286360cfcbd6d48c71f3a8b7633df664e6fc3fa6f3e6e6f584d829bcf5c1e. 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/US3DF2416218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73686c63b9e174745ce93186fbce5eb127b7056ff44863a40b490faba4ebbe. 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/QM3DF2453461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5905a5adbf914768e256f895ecdbb31af04ae99790553f5b9a9d5aa6db4d6c94. 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/QMANG2452787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fe3366e9dce0e54b0530647edbf6590bf30af9c2d9090077d6c645bb378337. 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/BKLFO2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a28e386abaa54ef0a0e2e90d03060af93162e53153d71b9fdf7d8ab068201f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKLFO2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61170850de0f7a64833e7b7e2056b2d50c00dff69287dd1fc13abbbfee567923. 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/QMANG2219482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898901afeedf9b08698fdd42b1c1415999992b059adeb723f17da45762231b08. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BKLFO2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d840713e61317cfd93e0043f3d3357d95977011f76acf255f41aee0e6a0930. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BKLFO2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c37b12874152a4ded5a098ebcff46ee0399faa8215aa497e17a00ce350dd7. 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/BKLFO2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0baa5bc261fb644fc7eee3afe30fe6e6de28d89ab9fa97230583b1e186d8edc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2251759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe785ac9614813a74fcae48a79c823231c0da08646cb9b70c964e8e3f94b523d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BC62N2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee7169cd8abca63216c91b71eab8a54e0b56fdddc84a816d4417dfbff03e08f. 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/BKLFO2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9178941e28b726fa206eea895070a0ace97505e375452b505d57e69042ddf9. 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/BKLFO2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9178941e28b726fa206eea895070a0ace97505e375452b505d57e69042ddf9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKLFO2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77a88eb70918434a186bf8b28c21d76fc4f9e0cd86ca4657a2fc32606d35298. 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/GX3Q92365525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec70752159fafe9db43812408fc4b9d983cde33a5a9c3a4e4e093b3cadb18380. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKLFO2300016.