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 0xbbad12042d1c0c0d35369ccb4b31abf8d0fcf8bb2d7fa3a997047cbdff47094f. 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/9603eeae-f6ce-47ff-9169-e1da2a7ac4d2.json and https://artists.proofprofile.net/proofs/artist/9603eeae-f6ce-47ff-9169-e1da2a7ac4d2.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 0x1e74db58f3843968c848475fdf8d424b0e6513c789316008c66e64a966e82cf3. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FR7OO1920003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b455d8ff468b31073f59f57ec18b2ee7a967e42b751506be1bef3f95d320825. 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/FR7OO2020047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe448465dac789568c50d80b4104f0ca5c6d838ca8a281d6ffaf378f64100c14c. 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/FR7OO2120036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a4aaf61a2da7b49b02013b2ae9dce072d00611629645e1886c986f29981de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR7OO2220004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7e954f16a595e5d1f3cc9dada6d971f1e37d8595c65c5004ecb3b033c0777. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR7OO2220047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089e731f59da226ed89e2a2b9c540842093d825cc969fd3976edcb335ed21630. 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/FRDZH2230020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7355edd64d757e04aaf58cc3597343c24dd58e997ad6d5bbd99d86f03d31a2. 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/FRDZH2330036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f88d526b2001cf14137700471fb0b9bfdfb9c2f06ed7bcd17eacdfc000ae5b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FRDZH2330031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cffed4226381f379a09075038933e1af330c2c96b0ee0dcb08c4aa33f651e3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRDZH2330030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a9a8a19c655cc8872c6a38375af411dfff4479bc5e44269b4a80b60f2e56ee. 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/FRDZH2330032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe116233e1a1ea85993ee347b1d041f96898bf91f08bd91ae6201270df358a759. 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/FRDZH2330037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8132cbeb004075b88e841df38aa402ca94d18b831af08253bad1a7f4422184e5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRDZH2330033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c78acacc5ffefdddcdc9c1011e69bb13b0178a4fe99b715c04a1b7ea504555. 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/FRDZH2330034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ef24b3456174e9b8b505bb7e7470e3ef1e53ed8d3be291e4a7f5841242c404. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRDZH2330029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a4aaf61a2da7b49b02013b2ae9dce072d00611629645e1886c986f29981de. 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/FR7OO2220004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7e954f16a595e5d1f3cc9dada6d971f1e37d8595c65c5004ecb3b033c0777. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR7OO2220047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feb5a3b5a2bb890e086aadfb92f0d9336884dfa077ff2e964b2dc5a50907d73. 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/FRDZH2330035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42b36eccf5d5205d421d17a6af0742bdf44097d948a31cd54f98b1337488aed. 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/FRDZH2430139.
Tous ces Artistes qui nous ont lâchés (LCRLRF)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b525a757c00d8b1b62e7d129acb2f5b993981c0f05a78687edd3bdf63e032b. 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/FRDZH2430140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066e6566e62eb55dda0eec1c198c3a29208e75b0caf5e57f8a1c995dc8223e9. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FRDZH2530042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda839715b04f413db92c15fdc6a3137aa2b7fce345eed7a359775dee12f18e32. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRDZH2530044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42b36eccf5d5205d421d17a6af0742bdf44097d948a31cd54f98b1337488aed. 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/FRDZH2430139.