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 0xe773e01aa5a17ab9789c9a488a1ea9e07d7f01d3b43226a7a36c931dc46c9c89. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fae9ebec-74c5-427a-9154-54f843ee6e48.json and https://artists.proofprofile.net/proofs/artist/fae9ebec-74c5-427a-9154-54f843ee6e48.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 0xa11620b9ce81c70a855c1ca590a6f8a0d6efe2c09e3cbd25e366456ab4faebcb. 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/USL4Q0839408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631f863ed2cdbab3a10469f6caa1ce430bd4a433dd1bc97dcf9450d21c17101c. 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/USL4Q0839414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c335f65d058a3575c78c3b5ff265d9971928bcf00ce6c14fe135077bbf47a7d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USL4Q0839404.
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 0x0e7426e45d97568bda4917d6db2a078b9b356cfbe80ff3b51b6453b3d2188ac2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USL4Q0839406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf66b025f1ed027d2082469d5970e08a680dcbe291b29914d8b5b18eec5f59. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USL4Q0839411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962281b4f36d45883cd850682dfaf80f431b826acad918fa32f8e60e297f3285. 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/USL4Q0839416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb68ef1154229a11d8ae83cc41cdcce384de5a2d86c58b7325bd368f6297679. 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/USHM20360373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd40a4880e3274a8edd9e25de843798bd63ca0115adb06d66e4155e01c44c4. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/USHM20360374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aed8d0a8402b96e0aa8647f6d6f36b32c7779c9048a4f9f9ba345116a0a4496. 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/USHM20360375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe23fdb665c851e49db6b8436597e8f667c761f30c7bea39f05bd50ca09c000. 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/USHM20360379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430aa54d894bae7ef5b06592e7e5fe0777d1fde00295e765e0aced1f419c01eb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM20360371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f49019baf8b2730f05c995b98756f668104b6de00400cb9800448e1a413902. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHM20360372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4688fe21d1d208b96dddd9821345ecf660c464fb0200865baa0b1182978e5c16. 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/US99R0910013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3f0dab802202f792e3c43a696f46a4a96079ab46ef9c2207c85a18adb1620. 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/US99R0910019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa5e1f18c61b6e7ce805fc01c4f5402748429a8b9fa6cc580ae59bf5c7afebd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US99R0910012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b5c8b98534f4102d255bd73cd019f6c314ebd04b1f334d91582ebabe7af3ea. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US99R0910015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3210103ae0a9f8a3b073d5785966898a4c5aa457ce63c42fe85462851ae6ab14. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US99R0910017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505e9e9f59d856a5cf82831ed4d0131ec52d76df5fa8eee1c03855006152f560. 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/USZPD0610256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9adb87792574fdc1f9f249c7a204e43d1d9eb51f4e3590e8b12bef8235e84. 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/USZPD0610257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd911d220dfb0137cafe4b858185c07e71d0ff192beec25b4a2333612624405a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USZPD0610259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76586b80a96d38916b3761d6fb223a30592d93d6ee141f7e4417d2941679cc21. 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/USZPD0610260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c80879704c9bdbee42e43cb08ab410401af97cdf3ec7b6296d7c15685e496f. 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/USZPD0610261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433b992fd1b927f17d8d260dc1da9dd096151550de8e04d33d380da4c563b155. 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/USZPD0610262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dda0dece92ffe94a73f7f1faacec02f8b238df9ec3c56bef1d6f4e366ae625e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USZPD0610263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e0f02e01efc45e4cdff105b67b5260fbdf2df0f19c9ce4c94a6543ffe2bd23. 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/USZPD0610264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee9592c2faf22ee2461fdaf623149c00e1d897f1f75610a5d51e22d93d4514e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USZPD0610267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9938d6e673dae575fea5219aa7c1b735b6721fe8f54727c30617717b1df74895. 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/USZPD0610268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b5761201502c331a14ad95e7f460ee9c8566ee5192e17ececcc3a8a2d8dca. 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/USZPD0610269.