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 0x259eb69eb523b6dc0b18936eaf3d8ff6d76de2d0a0e0b208136e841f2d49085f. 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/c1f3fe42-2392-4af2-803f-b5e9215500cc.json and https://artists.proofprofile.net/proofs/artist/c1f3fe42-2392-4af2-803f-b5e9215500cc.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 0xb546d4bbe3fc750d50d82ebd21bdb62f56c985ad5f070644e87e21616692c822. 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/BRUM72300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f404e41522980f7698c341ef0313215058ada9699360d4085a50755d9c7ea06. 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/BCK3S2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff63d6c04ecd9acfb56ede750a9fdbdad07895a5a2afe237326a8f22a6e8a59. 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/BCSOU2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89348adaf71218888f1b282ea0ee4a39ded50bc5798bb41ee536a4abdfea4d26. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCSOU2100045.
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 0xfa3572b8f9fb57a33962123efccd48ca2bafe139e21fc917a0642fc02e8cb4f6. 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/BCD592400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b99ed49c036554325fb278194807159fe492787edc6a88ac11a8d5d386171e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXVK62300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c11295ae0e904c3a11f82e02c6885f9dd5d5cb7a635075c4c9015217658a6f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCO3K2300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9644c599209dde1911e209e360fd6ebeced19c4cf5d1718b47b14ddd48020677. 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/BCD592300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043901e76c4fc99d1556a70f15b6449db2a2921feb6ce37425799c8d1dec6eb0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRWMB2301011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5bd24f0f7225a66a0d037dcc642ecb7ad400d57780aa273dff87414ba81231. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCO3K2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc4724f405ca165d4c4ed7f40a1b5b404db058ff5595b1fc19823b4e87a6ef5. 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/BCO3K2300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcaec45651e48d94612e77cbe854512688c6a76c7714cc3e7ba64526e286f22. 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/QM6P42352316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7b481c0c4aa25fb14e7afa4c4c58a31b7ff7427266000cc57a7b2f0bc4387b. 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/BCO3K2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2373194787e5b540364250184c85681f9318e885727dbfe60704b388f53228c8. 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/BRRGE2300414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf604685992637adb52d04f11fd0eb2a994373c131a4a03228b64e3d53d6275. 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/BCO3K2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0a3c68678aa27d313794325ce43bb15ba6531916152e486abb018666e7d50f. 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/BCO3K2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd009e7adc3025b03f40a7d975b74032bdb856c9bc29efb9f29c9d160a0dcc. 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/BCO3K2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258860ddc9764a35ea1878450a08dfa59353d2f2c8facb68b990cd4d849e3569. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCOOM2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027b9f6269db8978fe12896989f9321b5ad0b3c85f303e37b81e3f7781fb5651. 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/BCO3K2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bfe32d7d563f4feeb190f8567baf22c72a9e427c517a7ec8b0ec757f87f26f. 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/BCX6W2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240867f115a5e5d8e405a8527ccfb71f1373b54139af465703899307f901d0c. 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/BCO3K2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f00899189c89bdb7eb28f7ccafaf1259150447e63d9dc131543f20913ffc56. 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/BCO3K2200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e918c10b8201923410d1479e06b33adb7544382989737294a003ea55ffef70. 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/BCO3K2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bb7ef302d56256ede3623a69bf253c2b9a83c0f09ab54db20b179c766f2027. 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/BCO3K2400031.