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 0x6972e633a02314e0e17eb09d8cacfd2d818e42fb96bc4e8006c5be6b4df6df60. 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/9c2a54aa-1e64-45bd-b3bc-e540cfe2e940.json and https://artists.proofprofile.net/proofs/artist/9c2a54aa-1e64-45bd-b3bc-e540cfe2e940.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 0xd03a2f261416be1584d391ab7261c82d8d0a3fd9141ba715287c3c7387a4bb50. 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/DEZN82442748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5dc60853158efaa08169d85db845d606c2028da2bc9cf28abba9e8899f5f2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/DEZN82442747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a8b2c8a2bd779f2ce59a671176091b7e6f15e808626dc016cee84fe0b22fcb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZN82442745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49762bfc04501df6053c7f93faf7965f0e99df704974a54548228000112a6007. 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/DEZN82442744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89f6773366e4455aed48e811e0034626cbec3cbae04d5dac076838567390a5. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/DEZN82442742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ec4ad16f19c5409145ae1554d2e5ad085ffcd6db64a141e53b87ec4dad8a4. 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/DEZN82443288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac6c0963b864d89a392b95c8e038c71db803539279c981711e7e3bbb25e196a. 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/DEZN82443286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5975a1b2d2f9bab42b20ec1045626cdac6bb2ab067322fe2b0564c9cb8d3edc. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DEZN82443285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f2054048e9ffa0a77a3c6b706eb611e477e8a1ec35f610503541763d4779a. 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/DEZN82443284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875dbbe02c030412cd0f37910291263e12707ec8d2a9c6de4da157651de1d99d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEZN82443283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88153684072409b3dd77df0fb0da4768232fd27acdca1edb395f9a457f0f8606. 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/DEZN82443280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8929b5fbd653e8d3187c71ae6fc0d6bcb46086a2e6a0d591576dab047aef0720. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DEZN82443279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0bf1664dcb5e486760151a060aec1d64f58c2edbf5988506c8fa4f74d86d9c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEZN82443277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d37d6c30f9ffb2c26528b8e0037442781f8d626a0d93be9617f9e6c11c35b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEZN82443276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60c9b3d2c5feda55952398467126f2dc779fc02ec6405357c469f65ea6adbce. 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/DEZN82443273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2441fb75103a7653fd05eba438f8f9289f33109437f1d8734f730e07973db1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEZN82443249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7ab1a5017bf7c26483eb3504365468bcef99b26aa8d559a48fbdc4befe1ec9. 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/DEZN82443281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b3c14dbd2c64d863a51442fb0d3921aeb8f16b2216fcd2f46f951822372625. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/DEZN82443321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f0c57ca14246475e5e006da9717237a60acfbcfa3cb7ad19f94da4da7cffab. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZN82443320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38464a78658ae8372959383e04a616add604c196b116de35c4cce63f3efb87. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/DEZN82443292.