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 0x4e191dd7bba9b1292ed0bc7958c54f63182f85faf09ef765f3c1d12296827c64. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebdf946c-fd4f-404e-9be6-6d8f9be9c76f.json and https://artists.proofprofile.net/proofs/artist/ebdf946c-fd4f-404e-9be6-6d8f9be9c76f.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 0xc20bef4d6ce41ccc75150e574b9e9b4ec4dd5da628bd72b33bcd314a26ad972d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBMA22441498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad17bbfc78b3e385edb416b93fe120755875c33a52108fcfe799e68a247f267b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBMA22441481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6193628c060b226b0f6d7f6d59eb14797f55989e5b074058a2ba16788c69058a. 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/GBMA22441497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f648e8f6b9fc0d6f65df29973de4890890252af588f3812300b0eafb99c0cc7. 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/GBMA22441483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a287740e9a61a963d9f522c98c8f03f867a4b6d56eb406bf9e23a8787fd67c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBMA22441484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7273a0d7a5a6d71421183ba6cd2d1812462ae51334935d983ba735964c1d48d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBMA22441486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67fbbfc56c71690d58d5ecef93cc16724908e2bb3fbb2c3e7f3dc3f159c5d0a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBMA22441492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c575af9d7df9f4f664095de954f3a1ba37c4fff07e45733bec0c4468f735c8. 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/GBMA22441487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42fb5a407e2ae41f4d2d777248b2e114cd1fa2cbd166bbe5b9479f70b496a95. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBMA22441488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233b319b3cd9a6badf15890afab622b34e34665d93dd04783e330c9201552488. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GBMA22441490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724dccaee763aa4dc3d941cb04498af0637b73e3342e9b7224d0793a7b957488. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBMA22441496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5382e9ca4d39cae10277e70b342273c64992b3f5899f213ab480bcf8818e65b9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBMA22441482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35dd578423aaa2e0cefe599a2662b6ccfc1c2d73e9111db5ce7e910277bd8e7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBMA22441491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b34e507d8d864fed90f2bfab9a6a2a02feee7b122f4a47876a0bf8dd28c1df4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBMA22441493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f73cf53ae0471d8e9c910ffedc9380eda96818dc9f2d7bd928b255449809347. 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/GBMA22441494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cd36ffbf693e2fad56dc4940938b6f03ec71f28f4453549ca30e3ea1e83401. 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/GBMA22441495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63333b95d319f3a0e3c32a1246a07cb4b9968cb50d8d2f62655aa5488edd5e6f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBMA22441489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255203537a0be2c5c8ab5139eb748878ce3d98c8ed733facc9995d2bff145a90. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBMA22441485.