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 0x83e10facea90868eb1208720775f8a7fbfadd0f2d4862c4b4b5b3e9e261e362a. 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/0ee98b1f-e9f7-4980-9531-b6a415230e38.json and https://artists.proofprofile.net/proofs/artist/0ee98b1f-e9f7-4980-9531-b6a415230e38.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 0xa825971c557388ac5c8fc538d283e56d8a7378aada86348cf1a5a81ca069e4a9. 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/BC2TS2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46142562705049c5269baff8cb60fc86c3d9b7fcf9fd6324b526b3582c1df9. 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/BC2TS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535ee194b7cc7b78635b346f99bb5c17eb5cded419df31f5031f2f63cfbbea3a. 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/BC2TS2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55f5ef6c1ed0f4658eff7deddc669d74866345e186e40f24305a28a64a5a100. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BKUPC2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81036b34acada4826da9e943cabb0b231b94cccece772a881c48933c83ce5c3f. 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/BC2TS2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e06cbd897810b21c814ef7ec71aab8131cae9ce7fd9a405926f12712d5397d3. 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/BC2TS2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257b1653d15b96a1bfb495aacffc8cc37cb6a5c28c1a7506a985526efa4be4fa. 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/BC2TS2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4925b869b67d9dc74eb6668ddfec54118e20e900ddc7782ec9a7ba25f37ef53d. 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/BC2TS2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657a1aebb240d4014ac8f09d007c9b07d0625bd9e47a6ed72a1861a6407e629. 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/BC2TS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46142562705049c5269baff8cb60fc86c3d9b7fcf9fd6324b526b3582c1df9. 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/BC2TS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb034018eaf26ec84d4a72c74f993e0debe46b6a4448482ef9d29a43f5642266a. 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/BC2TS2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2a4f4fa5fa1cd5532b2af060aef5a514fc869a81f8bd933aa1169d55d83905. 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/BC2TS2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b7d2eeffad873cf8fb730101a08af89899bd321862c6a693e71306e30b559. 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/BC2TS2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b4c4594db227eaa7977ddc0802fc4e88c5fcedae136217d1e186057b641edd. 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/BC2TS2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe612c33e58e97a69ca15fffa34cc708f2fd21a4c0ae3cb0e4e7a1c252cf3bba5. 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/BC2TS2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af871415a0db7aa50df9c0f23b8ae7043fa598a8c25543f93fcc2683c0f372. 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/BC2TS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049c5756e586c7c8fd5afa926a0da0acd7f9efc1a174b997637a5c82fd09c236. 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/BC2TS2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6896754761aa4ef3f1128def19b5d8178490ebc8f2c3fb80869e4f32b463afc2. 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/BC2TS2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535ee194b7cc7b78635b346f99bb5c17eb5cded419df31f5031f2f63cfbbea3a. 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/BC2TS2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd723862d8e8a816956e7ac52d46a9cd0c2150d55db274c109820bfe74295fafc. 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/BC2TS2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e29412ccbc7e497b257de829094dc506f439cb7f495638f7d207dba6dfb0c4e. 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/BC2TS2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc63c76fd23cb0c03616c14ecb434fc209977fb40d4484728723b35db3dc1799. 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/BC2TS2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9af5e6e077139458e4c475a8cf170b6f22497ab44257d507cb78ed3a5dd65d. 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/BC2TS2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c8861e5b248e12cc2bef1f74782c16e1c5250602ec28f226ae3e76cd7f8f0b. 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/BC2TS2300024.