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 0x1492ba6d8eb9384bfb7f74dad28a812e3dd97309a2d9157e6d5d4dcfea5d560b. 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/1fb15f6c-518d-4ef4-aa3d-d49b2a896eb4.json and https://artists.proofprofile.net/proofs/artist/1fb15f6c-518d-4ef4-aa3d-d49b2a896eb4.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 0x440e301e0e6847e42ef61d5837b03ea75f3e19e8fab956ba68c4e4720c6e8b69. 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/FRQ852100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68722271577496b900191a5bfecff04ad78359e94f8bb5150efc640b2017d2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ042400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec915bd600341074ead60fded66c807380d6984a15acea37ac987e864038b18. 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/FRZ042300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f1237060c1050d2870c8c2967d5c4095aaf3c480d7a708de7dda64a34ed62. 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/FRZ042300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5080af3d6033654f9da9459133ae14a2309b6f4bd3270fda689aecfda53e8baa. 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/FRZ042400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b753ffd68d5d56a52df6418ab8437ad557d412a4a69f11ec782d4bc7ded9fc4. 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/FRQ852100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848472788cd06434edec1851ffd4d6e6b83cb9d3fe74523d536b26b91fe48221. 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/FR96X1976471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bf4b8d70686266ca858cd2358fa1d9a5bbacd086acc1086ba827b064d6db7. 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/FRS182083886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e3d4a9ed253663b635ad64f605abb7bfab15f96e67a424ff14bc1f74e352b. 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/FRZ042400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b232a7e8691340f0ce10b54dc3ea7f8cccc71aff3d2ddf970a4fe38d76182. 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/FRZ042300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bf4b8d70686266ca858cd2358fa1d9a5bbacd086acc1086ba827b064d6db7. 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/FRS182083886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848472788cd06434edec1851ffd4d6e6b83cb9d3fe74523d536b26b91fe48221. 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/FR96X1976471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a7cc93ea30273f75dc0c05098a7d9a08c03add5d4ae99b7fa3b6c045239063. 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/FR10S1944250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ffa986cb7f692282488e3677298e53039eb9df2cefa6100603c8e15bd9440. 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/FRIDO2412915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec915bd600341074ead60fded66c807380d6984a15acea37ac987e864038b18. 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/FRZ042300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1fdbc6e6e8b3e9eb01c05103399b38efe090678af0103ad72101e30a0e3e43. 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/FRZ042400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b232a7e8691340f0ce10b54dc3ea7f8cccc71aff3d2ddf970a4fe38d76182. 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/FRZ042300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68722271577496b900191a5bfecff04ad78359e94f8bb5150efc640b2017d2. 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/FRZ042400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5080af3d6033654f9da9459133ae14a2309b6f4bd3270fda689aecfda53e8baa. 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/FRZ042400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a897f356d5aa6565ad7c627520b22b03920273aa9a0d07da991166fc0c9c60a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ042400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a897f356d5aa6565ad7c627520b22b03920273aa9a0d07da991166fc0c9c60a. 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/FRZ042400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a09966e51241076a7cfb6610268dd795814b635f211271748362c97bf1bc57. 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/FR9W12203490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a47bd29c1c002d4ab88d4699f5764a119466da4901a15de902cab281cf982a. 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/FRIDO2414593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1331bd2685cf73e908e120c609650bbc548bb4802406b32fb277518d28dd4cf2. 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/FRIDO2211241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ffa986cb7f692282488e3677298e53039eb9df2cefa6100603c8e15bd9440. 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/FRIDO2412915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05134af968d04a3a60b5ab5a68fc44b2b0dc969590d565939bb9d81232c59548. 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/FRIDO2416059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d62380727443a92068b6869ea2cde8ae516b46a7aea27cdfa661c2b744a6126. 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/TCAIR2437994.