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 0x861bbf8535b761d39f56adc9d6763f3a640645a4b261731a0f5eec31e5f8be53. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d121d26-7e02-4682-a1bc-ac85136035ad.json and https://artists.proofprofile.net/proofs/artist/0d121d26-7e02-4682-a1bc-ac85136035ad.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 0xdc9aa1c415f69881a7d414e75cf2d2ea48fe1d97fafba52fb08d375ae88eb270. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GB8KE1754223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c822933a7c8376e966217d6db9db8084114577093fed4128e43365cf754ec6. 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/FRX202266790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8feb8b4eae5c595b22bfc59d0fc8272503f91df7a38e1684ebda26d842b32. 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/FRX202291202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d478106df85fd17de4f488324ff1f6512e7d94ec22f74baaadcf322fdbdae8. 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/FRX282296937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf138660b11f92cb3070be9eb3c31ddb48b2b0a86a8eda14103131301f9709daa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX452202758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c516925f2cfd858d1d0a6409140db488fad93f980c20f9c9c6419ca9d727734. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX452202759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aa9f19fdf252431da3533b4e94cc1c8262c0a5503de3030b5e1b9bb4f1f845. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR96X2266287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0398d6e920ab64e00731d7308538f6acec0e05678c0846ac14e625931f413859. 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/FRX452202760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c822933a7c8376e966217d6db9db8084114577093fed4128e43365cf754ec6. 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/FRX202266790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae040baecf885ec3f0b068d996db47792859daadf4849972f068f4d7dddd2a1. 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/FRX452202761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d478106df85fd17de4f488324ff1f6512e7d94ec22f74baaadcf322fdbdae8. 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/FRX282296937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977067ff77ba2979075213659e7e7157607564a970c72f042d861cce92a46356. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRX452202763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96eca05fee42ee49b268edb7f0c23b82410fd35691f7db912b7e97f94758bee. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GB8KE2327578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924aeafd4040b971a0ed0736b41ae43579ddae32c252637f23dea6a427c5c50e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB8KE2327579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96eca05fee42ee49b268edb7f0c23b82410fd35691f7db912b7e97f94758bee. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GB8KE2327578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924aeafd4040b971a0ed0736b41ae43579ddae32c252637f23dea6a427c5c50e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GB8KE2327579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c24824d5c170a2d04b585f17d6c45656c48c9141857eea2f9f0c90c12d0472. 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/GB8KE2327580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3061e240eb7aa82f6740901ae53c4b964042b1e8f84f80cdeb33efea46707a. 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/GB6LY1601159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b5408ba3e8f8f7ace63ee2f2a7a81357d463bc247ba8d4960380435b323f70. 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/GB8KE1952017.