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 0xc44fc2a018ea27eb22a817aef9c0f2ff08850f472990c8b8f0f78c7651c699be. 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/edbc830d-dce4-4807-8c7d-6cb9b6d036bd.json and https://artists.proofprofile.net/proofs/artist/edbc830d-dce4-4807-8c7d-6cb9b6d036bd.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 0x9d292a506c85ce823bb993c47c0bdeeea676494a44e58e09920d8bf3fce7353d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BXSSW1800351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b8d03e164d35486b7666fb5413cbd3cf841fde66ccc1a2a965a1796a8b3b49. 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/QZGLM1991736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8504cc6f948092a4cbb40974a66fa0dfcceca31f00b2ec83dda83c476a4250. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM1991738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7572d1532377fd2bf9ef30be5fd4e30d6c122c1c4ddfb0c03fc3441d95612146. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BXY012000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2a47dee1f766757ee13c151f1db213f61faf95169b0aee51778bcf9ef1f02d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BXY012200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9461eb5403cea29008d5b34bfee4838d5bbeaf755a15214c6a73bfc651e24adb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BXY012000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9273963d7411714790adbb146414da641d436659a381a41a31df0d0f5fc4ec. 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/BXY012200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cae80e54e8c50056d53d6c56d0d47f7bc276ea2018808e04140d74260fa4abd. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/BXY012200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660efa40394a260821b7e6725bde92f31da29ecd9b08a334d634f6e81397ebfb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXY012200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7572d1532377fd2bf9ef30be5fd4e30d6c122c1c4ddfb0c03fc3441d95612146. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BXY012000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85435aeed20798a4f237f6f93a10dd2383bee541ee205af12b6ba107dade1bc2. 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/BXY012000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b086e24e1fd7ba2d1107000b64ef2adb8b4f17872fd0b3222a79b7c27ff794. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXY012200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f5421865a44d2b3cdbe5ce38fd872770b189eafe4d069d4ee978241f92809. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BXAQ22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d589fb5df0c1fa4ca10a5dd5a775783d93210c4252c47a0687fe97893c25d27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXY012200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8c9796240ae5bfa0e1807a18b77587da6706ad7bf0586899818293c5c76a51. 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/BXY012000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb0391399d07b08361615c6bad7f71692a6b9990d840c0e6133c396c1ec2172. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BXY012200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678ae47a61c6f4e5b90fc9ffb950f97ae37192a9ea60c0899fa4fd46b4429560. 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/BRRGE2011271.