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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7e92536045e343a9824ed732e271e26445f934bb85ec598eabb85c1729695. 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/3eda348d-0d88-4ac2-ae13-efb1cfbe319d.json and https://artists.proofprofile.net/proofs/artist/3eda348d-0d88-4ac2-ae13-efb1cfbe319d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5726a86762b311b93e0f19ae9781765f588ca6bee5d02b5e88ff5b3ace948c6b. 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/US3DF2409532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3cd1fe629708bcb5895da0856801f41a091bc5c88270da260f6d8a5827189e. 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/FRX452428105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97182bf9c38e5d719e8811547618ff03457873f036730e09005d864dbe8175e. 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/DGA062424584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc74c25188c218850e1f87a17ae5ff43c8bc84c7bf666a58a93a635a1cd188f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA062426526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dc9e01b17f3c314820cb2a81550681897fcd5afb6ca3fda3eb8df6c8253606. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA062426525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71623918ab1baf3743ae73716bb904e22a28c24bec1e0c16c03408815586397f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR96X2426188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1222e1ef1fc1d226cec14f0c697775e916c544f5d4ebc9f323b4784a682bc60. 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/CH7812403623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ce935ce3a0ae2f890d89dde384089776dadb1de6f4d40a1f5e204883fcd141. 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/DEH742421719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded911cf0bbb4d8dc9aa4a127d489e947bc1f9e05e7030c964ef004b31a28012. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAKB2379179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac00de071fb74f51b38106cd5016e0fb3d7e72cb332aa23fad1990a19f8911d6. 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/CH7812363014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98fc4e359621859756acf688c2400681b5dd76fff1177e3e57650e3ee8fa7d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812363011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7947c1cfbda79417ad8bf35d9aa6244e70fe9db0889215cd6b001d9cfe285610. 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/CH7812363012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b74d927b69f9007879a8b933df77442b51f7c9961e7d1bad1187d3d224c6f. 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/QMANG2234311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8180d1fa905e6f0f445c3e18e7c5413a1f1d53a06a63fcd2db16b483806d04. 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/QM3DF2278892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b96fb741dcdb7a30cb974b0e63bdbcb504361c124ee789f2b4eb87f73247a8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEQ022374025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3f71a0a21a8fa8330a682d1cb5c63898bf72b8622d0dd1e2678a163b8aeb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA062387369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecb3bc33b27388a3c4e5bc3b3b5615c19ece4709e18b8dfa477c4649c305b8d. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/USANG2270458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196166955ee67cf54b8a672dbf63ad9b2f1a10489fcf4e5c8dd762129da2904d. 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/USANG2241002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a1e19dc631c1ac50e44e769fcbe7fee44da9319a6942f893c456e79b38f6f5. 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/USANG2296663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bd4c7710a84c9fed740e8370ef08ff2e654c2e77379378bd1035192cf7657. 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/US3DF2553138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f4de631f9c1990fa5bc621a9bcb06da1a4eaad38e7faf633aa23105842604. 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/DEH742434933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede4a1f1befbe2d7ee7ff31173cb8b7c0ccb135e29b996dc4286450858826ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:10:59Z), 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/DEH742431753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd29021adafdad9f22ca98146c53adfcbf4a8247d6d59bbfa512e754071c515. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2128471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf212b6f735a37e3839e13715be5af78bdff35391d3b8387be4c0d43ca8777e1f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM3DF2128308.
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