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 0x7312638cbd225286754496d5759af9551fe3b4e81a6662e4e8e9ed4d7ca0b41d. 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/4cf94325-234d-4456-bf63-31b82373ed98.json and https://artists.proofprofile.net/proofs/artist/4cf94325-234d-4456-bf63-31b82373ed98.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 0x3dd4871b37859d0f02d79893ba5c404a454ee7c24f60726beff352568b287e1f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA2P2020598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8d8d001ea48b919d8646e496b6b18437c2c3984a5e5f2e877095302f1e75e. 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/USA2P2020599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64764ab4abe7ca043019d390fc68b15a204e6599aef8270cf4737468977cc337. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN32353771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27483d3ae5be8a4487dd29e7b6c5998e961ba32170adc79508edb23e8cedd713. 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/QZS662199022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3220630fe615b2f87ecb96710fa426249f68ca3406c006d60b26a695b1d62218. 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/ATEK02177279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fee7456ddf79d101d7e46ca1fba5aa235944a4963ffa11ff65ce9757e2119f6. 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/ATEK02177206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ad0c7d3f94be1ef0445080b1930d8bf4d8d245b103f45d4188b8c73e66f75. 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/ATEK02177208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59a51c482e77d566a4f74fcba089603463a7108a65b5c70424b9beee99346b4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92197787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8aa62e11b85a9c73a93f1281413a7ef6023035dcaf69985d29dc2f10bf150. 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/QZS632165513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c6ab7e66eb0bb616ddcc9852860735e7523a0e5da48648876ce5447f5c53dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATEK02177046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed65de6a57c43a87432d965cc9bb8cd7658bcbc9b47c2d96591e1383d443beb8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAWHO2025182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc310b1eaed0c425103ca7f82ad469a5442c1f241cc33e4b722d5dc2be8292054. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZKDK2090499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19091d27a04d175da750688c1f7fb51c9313f387682578be09d38ae70f13c7c5. 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/USA2P2020139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4ec71d9f736097885eaa35a2f51458f84580a9ad7fc58f33f70924a5fa966. 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/CAWHO2015290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384ec2f049409665e67e96c7341abf9265900aa3e85f86e6fbd9d8f55c0973e. 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/CAWHO2013187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cdc848ca1c212a2349c83d5e5c649fb880c4780fbb98001ee013fb3f50dae6. 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/ATEK01977016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a8960853d40235e839c2ad9791a8cd67ce282275bd8da3d45db7f97642fb19. 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/USA2P2001079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0499def4a55b45a5bef850e51568a0e5fdc53cc544dca304f081464b0c4294. 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/USA2P1960291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3a6cd85e1cf81ed5ec37fb1ef24ee23dcf2c79636c090433c4f4f8cd87bc87. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P1943349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c015e65438cb53a7e8de96700847ae736e15ec4348a7f6c63f1177f4596aa1e. 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/USA2P1919889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9488aad9343b1a93cb5c9d02afa1d4ac9a8350944542ec9b66a274194bd77af7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CAWK51908177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb7b275662f809f074a93b323ab7b171a9332078563e314ecee98df3b1805ee. 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/CAWK51908044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e85437d2bdc42757dc1e884ebf2f067a10806b62ab0f30db7168ecbe1215e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/CAWK51901613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a34c7be713139cf4fc184b934c8087b4919b391e343ede1f642d1699007e58. 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/CAWK51800999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee822a149d34aeb37b520c80b4bc2029fae4e08810f3d50cb597bc28f7da66b5. 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/GBSMU5620699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e3da747cc0faaee95123e9b0cc84c1a0cd32f2e8b40f96011403612922178f. 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/GBSMU5362242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e4a0802fd71c64ffa73902a4bc9c26171c7ca48a61a8430e2d0f27688cedb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USLZJ2084007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bb741d46c2f972b5e25b11aa78c58645c092064a637fe960a9910a0f93b703. 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/USLZJ2084043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be0f14c084de343942a632bb23aeeb87192ce81cd4082ec78d95d3a4502fbfe. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNFJ2202612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76941b264c169f1795666df76d3f61c9d15a6e9974ba173f73e373a6d9144ad9. 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/QZTB52215166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f367c91e160e19273b31896e10f4566a799d6980607c5a52250d188d5d0091b. 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/QZTB52215167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc405ae865e32c91df6d841492fc3be03ca29edd697a11e839f77f9217d3b9. 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/QZTB52215168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31294b2c5bb4ee37a2e6e39fb9a5e63e1a0cb0f3c8a52880b11c45730425d3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ATEK02177057.