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 0xf8e4edc70cba2ecec9804907bcc13cae5966e81d286dacf9666e6460a4300b52. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24a6ef4f-6019-4a94-8045-032ea773d45b.json and https://artists.proofprofile.net/proofs/artist/24a6ef4f-6019-4a94-8045-032ea773d45b.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 0x9dc96be21f1a7ec8c9d8dfe2d6ec07697bbfb5948a2867feca01ba5d84754c4f. 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/GBMJG2112656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac28909dad9443a22c1e9227cac432cbd38d4a93e0e7c036dc324cb00f3f17da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2112658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2aa557f6461063fd686e9158a14884550ac5b49dcaacc66803a5e8bc5fb87. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMJG2112659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8976b93a660de6c4bfc15eb0bbc89263ed72adfb93e90b45ea03befca95c2a99. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMJG2112660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7141e75ee0b77353690ac7447f706c180838ce079a76e0ba1f2db3186340367d. 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/GBMJG2112662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3845a6925a5e542b8968ff7288d371df9df43e35f6eeadbaba5f9a1813baab. 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/GBMJG2112663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca07a7f24f6bcf54343043d4214f8ddf35d56d19ef9992379c39f494f2a5243. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMJG2112664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ccd557a92afe74ac9929c6af65937c9e380930b46fea14648187b6a043dca7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2112666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1a5814b4441fa2c721f8d1a1f11e1461d16f65d3ee113d669b16b50f26c8cc. 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/GBMJG2112657.
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 0x2659a58134b6be657079238722fdcc68b851b3cbd3b8b3d93c18e405cf649b9a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBMJG2112661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9febc441d57a4347d331682b1340f8eb9e75bac520cf6864948779469b8cd3a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBMJG2112665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c33d60e32eff93bc7f1d0956322b918854710e1e360d7d70b6e20c9f624fb48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2112675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8e7f4fa50ffc0e37f800a6fb55140b5424341e7cb4fe611e2668b0f47d6e0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2112677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674d33cd1d14c7a3e2bec9bb6312c2e8303ef121a2bcf9000c59c763220aeb7. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GBMJG2112674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d38f7b491758f77ec7520e0e79f6a7b6f40f0ac26a88d73f9f4ee6a730ad65. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMJG2112676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ed9634b82149e208b790f308a1d845eddf0bb6d094037a360d36d9d0078aa2. 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/GBMJG2112678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0973f76499104f233706b8bd0fced2f2665c33c8a4e310049c94b4d88e0c81ef. 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/GBMJG2113646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59de31b0793a4bfe296651463e94d897f31b533526d27c37ab1c3b3bf025f92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2113649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244cda0eedc7a7016c89cfabd0b83c4cd1e997190f5190a3a1b299df0bcb9c61. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMJG2113650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb22fd0c9089c6c4be545af1f7ccfb4f75f9e6ece5f6c2428dc356b8209511. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBMJG2113644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9002a1fdb396bd2d01cf43ac5c5dc3b6c8a83399ba63ec05a4dc7ad85eb1d4. 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/GBMJG2113652.