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 0xb3fe9ff6f95bfb96942d8eace297ebc48a18cebf3dc7334c9444b6de2a2c4352. 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/b0e7829c-a60c-448d-8093-4be3ec450718.json and https://artists.proofprofile.net/proofs/artist/b0e7829c-a60c-448d-8093-4be3ec450718.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 0x38ec8f331ea23f94708676a45ed8d4651a1819c622338ab841de050221503df3. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FR6V80846135.
Waiting For A Sign (Baumeister & Kuip Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951be0eb118dda3223eb5ef15822836090ee31d8448b7bad10da54f7c355576. 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/DELJ81626645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5b5d3528d80e022ed1486b7e1f34696714160df7e7bcd8d82518d595828c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DELJ81626646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf656a0ae83946fb03221ef2abf4bd00bca1e4db974be86eefd241a7c131d0945. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/DEYV12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888db037a139c338b578fca180c3f7eceafdbca608fa68d8885dea7e63535cba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEYV12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f456f3d1a8394c6c4699363986fb0c19bd177d035e54d2549b5d68726223a43. 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/DEYV12000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a0164d1e771408ba806acdfb00a2545e6aa0e60a2c6da6b3dd0fbb77748ed. 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/DEYV12000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4d411d9e18d0b25b1b090a5c0444ce8d4397edadb21144c286b851eb878d47. 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/DEYV12000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fd9a7e3f15d11b8bddc89f37adbb6a45af2118684f596c9c8f507feb5cf11a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEYV12000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f94fd8fd0662bf913175a3b3765e25c688f6cf762c51797f5f9952c3af81458. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEYV12000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846a2eb759c8e1537c6fcb78ccfd07d8f62fe27f66b93edaeaabbd88d8bea5d6. 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/DEYV12000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4350b3e89256750ce61b0bfd15561642e9304dd2a98e6381b6e7f125ded6d120. 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/DEYV12000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2983d68e1b5c8b672dd65cca3fbd737a8319453176e93c7069efa7cff6c2a2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEYV12000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2983d68e1b5c8b672dd65cca3fbd737a8319453176e93c7069efa7cff6c2a2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEYV12000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b2ffd9ea3283ac26313305425fa2dee8813379f307715463dcf26054f4483a. 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/DEYV12000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8885862a46d9eadfa66b3d998dd3989376fb87c943a849a41fdf427151ff1e9. 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/DEYV12000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4350b3e89256750ce61b0bfd15561642e9304dd2a98e6381b6e7f125ded6d120. 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/DEYV12000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973163beac6753c2444f0c586c286f083494b1e1e0dcd34ed9c5db28e2b6d548. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEYV12000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c03f891a3f2c1b4c36632487297b96b9f46d48155cb5a291539fe8861f47b84. 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/DEU671902045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf5d56d405745e38b667a339534ff086aea67e3b55539efb26993c44f3bd56. 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/FR8Z11410821.
Les boulevards de Paris - Club des Belugas Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f997966526e911877980819e69931ccedb8cf82e4b3380267f7969b110c91. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUY41600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc257d5d82d8806bdacc60495ca2d6fd4e03d6bd20f90e274686ad3bdd6ed2a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951be0eb118dda3223eb5ef15822836090ee31d8448b7bad10da54f7c355576. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DELJ81626645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc257d5d82d8806bdacc60495ca2d6fd4e03d6bd20f90e274686ad3bdd6ed2a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US6QR2300089.