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 0x1732a5e3814bff8d0bbc4c77ca1c242369069eaec4f2b52bfc7602a1217afd1a. 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/e31e5291-0120-4130-9f56-ccc66333f871.json and https://artists.proofprofile.net/proofs/artist/e31e5291-0120-4130-9f56-ccc66333f871.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 0x00a9f9c4462de04be6fac4bb392c7cf23c77ee7cddad7e76f751ac2e5b8aaa20. 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/FRX202246345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f950381de59a8623a350a0b27262314cba45abd82d24828694c6e6ea807f512. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FRX202246347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd137fb98d0761d7dd6ed806977e0e1e426926c8a58d477085f41df8512139c40. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FRX202246349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abcc0a3a096b319d8948f87c4ad73358f76e6510d2f3116e6a611b181ff80f3. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FRX202246354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe211581084b832309861c9a999da2d12024e8aa6856aa15603b9eb309cdfc0. 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/TWA479697012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f24bd1dbfcba0d5477ba6021928bfa6af5a8402bb2c2ebf2bd98c5511b79436. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TWA479697014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27de49684bda7f5f8a4fb3710707657c9d77ed81a2d20813939117f49409423b. 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/TWA479697015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a85bf6c616effad86410023746eb605f62abf9e57abdf7ad47eaa01f25c7c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TWA479697019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe13acab1090d005652742a1af92b55021c27243ea7b623e82e5d940299e4dbf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HKG732536475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f9ff55ab003bf858e4c43dca9b020a939e0d5c82de9f3800aa6e10f1fa37d. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/HKG732536474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a36fbdb64ba0c6fdf22ee8de873f289a36a7235585b59d32edc58137a19dd1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/HKG732536067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8f6ac86677a1b432ca3b4573b1edba585d8251ab88f3a91b97ee8c49a769c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TWU712001149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf9b73c6cda16a8ac5b494bb49c409a2b090eb918276de244dda9138dcda41. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TWU712001150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ee973eacde00f607b6425cb66b41344cb66c637a122bf6fece7f20be6b737. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TWU712001151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f144f20acf209777bf150ea73c5a1ab5ac8b3d3b1e5a26b3825a5b1488068. 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/TWU712001152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbe02eb8aac36d1eec3d9b590cbb53f860bdd73c7af56eca0cd1ae59e376ae6. 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/TWU712001153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934841027d2300273cbce26659b0258c3c19a8bd15e9f9ce08d0eae5d9cb45c8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TWU712001154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73789b7320d1c24adb566c53b0aef2d6692ddeb3b66eacb4360e1becf3e9520. 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/TWU712001155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dd642d9011fe57883c8e3cf71f1246c3593634936226a36d309d5f3a12085a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TWU712001156.