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 0xa1f9264bb63eed046362e69c378067c114c7b9e12a5ee4daabe3e22d65c8b1a7. 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/f650157d-7d4e-4bd6-84a0-52294e59955d.json and https://artists.proofprofile.net/proofs/artist/f650157d-7d4e-4bd6-84a0-52294e59955d.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 0x6aabbf3609d312345e7f854cb7107acadfcb1d36e8616ddc6e84eb10667177c5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR96X2357902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb62fbafca1e67e96fa8d4e4e883da628b2ac5161572ee92a8c66f4f1dc1194. 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/FR96X2357903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4ffa3ef153211180c8a6a06a2ccba09a1a3fa915998c3a6f730d833a13a19. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR96X2357919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23059e1130e46aa95df2c40245b29f20ef78d1f6e25e9ebd5b7c7a842154147. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/FR96X2357920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35393d01d5751bc50788a48a419627df530cabfe4ec2a1059dc19d2686ebed5c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR96X2357921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c1c6a0a345b14693177612892e149691c6326f924375cb65c570f5e61ecb9. 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/FR96X2357922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910103f7aae104a3988327c36e391796bf044610782f700e73ea1518551767fb. 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/FR96X2357923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c22df0233c36bb6f94fff48e38bab79e9cf917abf2e2637b2fe8320de7c7a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR96X2357904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefabbd13a7faa23bd55ca58704f00635a96526c6710dbf06f4514eb139fdfef4. 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/FR96X2357907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c46560064081e8164ce95660a0a88087be0830ce972f0a0734b67bb5c7ec235. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR96X2357912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d00b9c2394077d6eaadf6fa6a248ebd85dcc4f8034cb747a25c49af89c87188. 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/FR96X2357915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c39ffd8cea78e04a89601c09833b0fb0244f69338714babd86b2feeaed5306. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR0Z50028930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20812f8eca0bb4fd38dafd19e07dbee3e633b4de0be73dfa103ab6cc42dc4112. 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/FR0Z50028931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed78e8641fe76c5678c2232872156d042be4e633ed84899a5ab5a81d62f034. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FR0Z50028933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdb590db622e43d66e97ce3dc921cf3ac4a47eafeff0398582d6272e38f2915. 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/FR0Z50028934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c111d11ac8cd50196de2cd105b408c2d2254d40f7c4cbffa492517acd89d913. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR0Z50028935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0c4a642b8cd4ffcf95d98cf2d26e0e816b1084d92545f2c17ad789e655b1fa. 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/FR0Z50028938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185c2a69b224113a4e8f712671b93aa2ed6d0f7df65dffba3a9c5fe92d4966ef. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR96X2357890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b9402ad944b95d143d2116a7969e94bd6efc106335e282346235b6f9077641. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR96X2357893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b1d067f3b0b63b2f8874238dcf747eaa5caa1a485a0e7b20d67d8b9b75135d. 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/FR96X2357894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e67dccfaa7ffd215c79cb1a5636507fd4e6c924408e77caf726a254259c751. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FR96X2357896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a2af2cf8a3c3b4f5e0f46f00ede8b4b6b54c5fd1497dba97a1a1e80b773069. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X2354930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb15447fe4383c9042ee78c92712e34c9310f274a21b1f15304ad9acd462c2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR96X2354932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca493953435102dab85db81860fa1e4dcb6949ac044efc777aa3482b6e2d265. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR96X2354934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6027a6cd331a98b872fe6c5fc21220769cbdc596d9f217739cfc16aef130d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR96X2354935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fdd2bd1f70538ad2b0fb3ebd6ad3566f63acebb5406b15a42ef1d2dba2de0e. 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/DGA0P2440205.