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 0x74f50cba45df99fef8783b8e406bcde616944d6bb561c585a4260a475663af3b. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c2e85ff-e29d-48ed-85ab-18c6115d08e6.json and https://artists.proofprofile.net/proofs/artist/3c2e85ff-e29d-48ed-85ab-18c6115d08e6.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 0xd6f11c9a2820df17b9d4b145aa96aa89eefcf0fe857b8e891c5db92eeea334ca. 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/USCGH1409856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4517a70e49c2224d2538d4a6fd42910474e4a9e9c92c322feb38bfb897b1b517. 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/USCGH1409857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ff168ba97bcbdd292bcf3d5927a7a0ed04477112d4b9c261d03fcf5e1004e6. 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/USCGH1409858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec3fd9656ff7813de15072f0d804ff6ed9717f10bda2558efad8554301d0b1. 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/USCGH1409859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3e0e0d3068a8df0f6f18a551d93628b77b7a2cf1f0bfa336596fc0ac51fe0f. 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/USCGH1409863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ebc4e3a90394a11a7c07cf8600fd1da5256218536a92135fdf659facef674c. 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/USCGH1409865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe888b3311f6ad6da796407627147fc4cc36415c409541b4c5f571b8a75f71c25. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1409860.
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 0x3cb9bd4847c7d1b00350a9ca28b694798cc2b4d1ebbe1bdac3632ab2a9397cd1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USCGH1409861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9089fc3404f55a523397612d9e9a04068d1425f000f68df0936566acd9a32ca4. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USCGH1409864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bbf8cf76597fc815b3d662aea7bec10cd84c0adbf2539cc3051cae35ea5d7e. 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/TCAEH1935696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ef1961c1c9391b1404474102a54cba23b25ceaad1963eb1fb339c8911a888. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEH1935708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d270f5e230bd16fbae12bd344559ef653e005b95c26af50486b790786bee2. 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/TCAEH1935717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d629ed53f122ba1b95f84bb2d6660055c2c67ba5bcbf0a5ad4cda2eee9e5cb. 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/TCAEH1935722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa894ca96b60734feedddc8dedc0de97921f9f098402ba01b85c4a848a562f010. 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/TCAEH1935735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae8bae2ba531dc8310176f22008b4b19e214f44a91f0274adea5ae9b5d91a25. 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/TCAEH1935745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0245fe71119146a0d50bbb8a2984b6d1cca00ca4cf8894730d021741e8769. 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/TCAEH1935755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4495a1cbcb3140a6c1d631d5a9b1fdb95931db1f1f13b2e1dd866a94d4c2ec. 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/TCAEH1935757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89acdcb3473e0a5ec1ced9babd14b510577010d3458c2f58165114e1251ecc9. 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/TCAEH1935760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b57d1cddb78e7559a2253461b42ff0679661bd2930b82167d39932ce1d265. 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/USCGH0965093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c682fc4bb8f11af35e4a1cb73452e7633a3dac49c232e170d45dad726f1c005. 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/USCGH0965097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfa658482953759d4b93efab59fd31b653edc3016367fad4fda848db2312dae. 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/USCGH0965098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf304d06d6fd12e78a5fb2041598e89c8bab01524bb7972ad125d1c633c7dfc9e. 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/USCGH0965095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3752fd909c6d51c83530c62fc7fcd5da561f34ecb93078ff39db46ae6b75f17. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGH0965099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fdfafdd3e1de93be6312af72d64db7b7b74b9b2aeb64fbb666a8aae5bde750. 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/USCGH0965100.