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 0x0f8a35f1e7d917fda1c6f84d8d05064a00a5510af824405e52c44a004c2e80e1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d992ed65-f8b0-496d-a337-e6d29806ff43.json and https://artists.proofprofile.net/proofs/artist/d992ed65-f8b0-496d-a337-e6d29806ff43.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 0x09ed897fa6080e879635ac5b72664f8d4ed5bef709a81efb35509ffcaa079b92. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZZ7U2465072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1cff4c2df9aab6ce06d14c690302999e0638d6e8fa54cd02ac9a6457771c44. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZZ7U2465073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560500beba65e8f66b63290f9f8b165288a10a317635cdbce5b9b097c785c984. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZZ7U2465074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e07fd9caf961dbee47f70956f90e9d703cd532a9d830b288d5749c5a3c7251. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZZ7U2465075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9bbdcb0cf0894d9787fb53d2ad0a6766960719e7b349fa60d3388611cd0239. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7U2465076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779ecc51a86e50cfd2aa98526368ff3e6d962fed1bdfd0d7cd7768cd56051b9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QT3EY2464751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075480f22078977019971b9f4465ee6be20e772c7425f37ace7c2c60ba49dac. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QT3EY2464752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e51b704a131e45d70daf377350e641d6df37efa2b7932c628563973bcae9ca4. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QT3EY2464753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca938b9e3ba46cc6dd520e6fc797728fcf66bb3156f45e4e1ba49dc66b7a9d5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QT3F22494467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6f25c7d8842a199cb3fbc4d72cb7d435a0fcd7e20f81cf25100266c3434b2a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QT3F22494468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c725e3538e29627799cf4df11f3d94afce40ec0c016e1330ace7cab2804f908. 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/QT3F22494469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0960ba3610ca68d59d3760668f0bae0edcf5c36d92f42f1c509dde519a10b8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYX2559146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54062f55a2ec2f6907425c568b6b12de9b56eca527e9bcf47adbdf3878f64403. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFYX2559147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcbcc33a3efd3e76087f652a0fa083b5f8324c76f1bdeff9a4dd6cf46884a03. 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/QZFYX2559148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e4fde80d7cb2d9b803dc7414c7c6dde2cdeeecc49ca6e4e6b055d33b7f554. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFZ22541522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c7f1931a5f2ddde485bd63d44d6fa35e201dc2f77f875a1db4da88750d2432. 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/QZFZ22541523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fcf258b785d246c00469abb528b8faeb181300faa4421849575cfb0035ca03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ22541524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c3880b9652a87b1a42d477762cc217d7670b34bae465025ded1dded03467c6. 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/QZDA62507074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80659449e81147860ebfd93f3d7d4b05dcd0de0a3ca1cd63f6b9decfd5ee44ad. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZES62589494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a270b319d992666a428f1b7993df862321a9cdf507b08d21360c7fdf91c79a4. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZES62589495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9516e92bc7b920e956e67920a5a800e2ea7347bce2a3a1803b30f51cabadbd8a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62589496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eedaecb499b66ffa819c6d6df856ba262a5b9ec76a58fae914612ec3db65bd. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZHN92593808.