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 0xeaec3fb2a675e9fb8c4fc0dfcb1bd417edd8557b439f04def247ad130a64ceb7. 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/604a92c8-6b6c-422b-ad76-c42dc482af23.json and https://artists.proofprofile.net/proofs/artist/604a92c8-6b6c-422b-ad76-c42dc482af23.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 0xb03ce0dc86ebecb498fa457dde32f34e3998bfd9bf9aa89927ff70e92b930350. 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/QM2PV1886636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7f3d24f989a753ae2b5232616fcda3e5b62e3e1afe08eb73f14f2ef8e61677. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM2PV1886637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f06d7be8f6dd70e728869c066e699fdd24d402372e3269580ee2c2d6eb6054. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM2PV1886640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298a878f9e660573b5a646f7e33fe526bbf78570212886c6a11bb79a802bae8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QM2PV1886642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe670fa84ff5541958fed726ac58530b04d6ec91a7bef1844700defd9938168b. 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/QZFZ32018097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353cd8e7fcc35785ed2d58cc56eda8d517e8585886ebf995ccf588a0356eae6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZFZ32018098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50556b80036975a5ebb0cdb8e38f4816548a00363d45d8de767c67c4378aaf33. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFZ32018099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f9cd3b8cd3a3a62a6360eac229ee5d0b86095bb38751ad777c13f36959de11. 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/QZMEP2059022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f9cd3b8cd3a3a62a6360eac229ee5d0b86095bb38751ad777c13f36959de11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2059022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86710ddce20166e69a609d53367a973b2996d914b6733c2537c4b7ccfd1396ed. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZNWY2040575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd366c30fae5060a8b1ea2d4f0a71c1f737f87c7c67ef2caefc91e7721810ef5f. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM24S2201084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd366c30fae5060a8b1ea2d4f0a71c1f737f87c7c67ef2caefc91e7721810ef5f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM24S2201084.
2 Ezra Budman Tik Toks but now they are songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b61c0b660e3e5b1af81397acb401a04c2e9a7cb901a5da13fef6b4e524d94. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM24S2203297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6230a94a26e1daa83798091cdf02b6dc0dc7e2a55b6fa92e81b7c708d593df5. 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/QM24S2203296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b61c0b660e3e5b1af81397acb401a04c2e9a7cb901a5da13fef6b4e524d94. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM24S2203297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc60b1b02e06c5df3baf4482cc5b1063004d686b7f3414f22e0146c73a5aac0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USA2P2317055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d5749b29d2916da33f005b53a87d75a2c4a0785c29bee7b1cbaa832066a8d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZMEM2415479.