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 0xf7f03d671ae157db6e2bc0448453552abcad49ec48088c987837c7c6704820eb. 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/b9f54f72-1564-4e75-a9d1-d823995b42fe.json and https://artists.proofprofile.net/proofs/artist/b9f54f72-1564-4e75-a9d1-d823995b42fe.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 0x7a8aabb0379abba51ed9b7454de0a0862bc76b9d4a9c39d7e4b2ac636b1fd5db. 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/GBNYT0100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec16f546d7e1efe7f1d454a3e327689521d3f40e921e7b879d833acfab6135ce. 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/GBNYT0100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032fd5f8aec48222ae1bff59a74a174dfac3e554dd2e9bbf1af9e8666b2cfba8. 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/GBNYT0100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf5144524d082c1248b887800f3df4174179b76cf39c97ab3fedc8355d89be3. 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/GBNYT0100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ebd281ecbe791623af9a3ff91007904a8d27dd22c1639035eaf4b28b7064ac. 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/GBNYT0100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12ae04c8dd9fc923a1482b18b2ceed5ecf0fceedd04bf3a91397626c552bbdf. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:49:38Z), 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/GBNYT0100024.
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 0x3dbcb482ac56f91a8feb54472f71c56d02a877fdcd2944d132d3b70e081d179e. 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/GBNYT0100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67830711d532f63b6c02d00eac81dd4768a89dab5a9fd5d8df5af8e3380f3b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBNYT0100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eae5f60554f80778e4cd7436f088838bb444050ce016632134a28abc7d3c34. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBNYT0100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17244e5c3615e9d85cd25c518ad743ecb5eb612ee68a0d6c1f87a7e02512ad. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBNYT0100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd5e70464bc86097815aa12deafd499078bf2c81e02ab9052de583a44e2be2f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBNYT0100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5cac72ff2d13463f0c755d7c6368742c827d5c4b03dc57d0cf5e04b7d5b535. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBNYT0100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b58718d32c56bea78b7c84760a26dde0ea5919b8c51fdb4c7f32c34533f3b9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBNYT0100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6908968500c4889ad713b845e56b1ccaf106a87a82622b987037d3ac333fbc. 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/USUM71300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03930b9d77028cd0a2e68c089ce3b32001371ccaf795f1c6211a331569371678. 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/USUM71300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e35bc14efc2f1dd599592c01fcb9fb6a6b33c1bcdf15d27168299ea9490d864. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c2b4c29c31092cd76ac90e0abc2bf230f1c4881ec2628554732cf7be909d9a. 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/USUM71300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c350daaf54cf24223b8c95928682225a01db28e9393e52cbcf1ddcab57733. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a41510bbf97793eb576c532aad9803f3d60e4a4710cf7fff2fcfd1ff6561cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885095a3b0e6a0e54998cc33f814a576d4e8472741aa865040fae004650daddc. 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/USUM71213965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf555b42ea8d6fe011af68efc47c86d57a05e44fea6fffe004304a8325a8b7a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09d77a422a7bd1c24346b7e92a1496562106bd12a3a6f2b4e9e8df32add1e58. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/USUM71300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7fbadfb49fe93c00444212c374d0ff607309e1bff699f9dc2583caf89e7d52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USUM71300050.