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 0x863611d7551b8c142e000655a3b6de0bf2466fe9311f58bf2ef8410e1529fd94. 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/0e24e0c6-df38-43c2-97de-587ca301644b.json and https://artists.proofprofile.net/proofs/artist/0e24e0c6-df38-43c2-97de-587ca301644b.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 0xcfea487b848b1ce02f1f0fc63253f5f6183d3dbc3143a542cbcec4b69f32bb37. 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/QZTRX2204680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea487b848b1ce02f1f0fc63253f5f6183d3dbc3143a542cbcec4b69f32bb37. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:20Z), 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/QZTRX2204680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f25aadb11d3d0d7c52db9cc11684fe15f65fa4832ad929f73dd0dcbfba628b2. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTRX2270320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f25aadb11d3d0d7c52db9cc11684fe15f65fa4832ad929f73dd0dcbfba628b2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTRX2270320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc738b981a0a4573a5d42b04f2bd1bf94065e63e8fc2d2b00c367a11f1ec590ec. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWDD2227520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b2a6909a8452b054e8e5267a35452d0ba30e4bfbc1b9907c030915e4560a91. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZS652338919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c43926f5285306c40ae38d5fdd85784cd4e0f119f0aa4da1a44ccdbcaf2948. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:34Z), 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/GX8LD2233987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf0b1514f9f320b9fd34478e6f711404d7a26f311c68e98ea69f3c4a5011470. 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/NL8MH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6970a630aa44dad2356f98716638ebbd17c8492d6f47d0d01d8a1bb1856df. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GX5MX2358207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfef29ff56b043a9ac76955b4c664244b06f1d5c6270822120a3e151f2e9a63b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMHL2211756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d61211b4b3e9b49cdfad7d34633fd8db7170fc93a6f6f8a4ed63397e81673. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:12Z), 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/GX8KD2406448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0286a5f23395564192c0bd0a94d2d1f0ab0e9a21dc0c9224bd7182643f7658. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAQOI2410965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fcf0213685499a27cbeaba2c4a5288ec60f24a31ec8ffca90f8a53db9855e4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:48Z), 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/QM42K2494093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f789c8184f96b8906644f40ec82601968c798aae2d7b7466493f524798b7cda. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZS662439855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5221bb614baef491b196071d7eb869ec31e19c622f8bfd993f530b4da7997a8. 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/QZWV32408180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa77bae70621a74c463946442e44df261330673ba126e8307b3b2d3d4daab5d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ8B2425464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5468d2a6a452f1d96bb153744845373bd5a72470f5a568b07ae03083dd1ce4e6. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:45:30Z), 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/QZMHL2550224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cbac923c1250116080139de21bdd3498f057d8ae816b84343fb2be03f26a94. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GX89G2538148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f163a61f54ef4680972285ce9a57e5a6d0bb18f805ab13126801d1b12cf47. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLRD52416829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f2829f29291d626c26759c5063af788aac7811e4f35dae548dd9f7580a925f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX89G2580162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa904a8b5ae83ea40e156acc2e39d13fff49ffabc23e8e758538a7e24445f6005. 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/NLRD52416870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c3e06793a19658fb57cbf3b2b86ed23a5d72ad54a4cafe38b39221d8c87cfd. 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/QZWDD2531657.