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 0x36e0a7ed535406a0f1cb43f9734375c68186b75aed1c634267ea97764543b31f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4b37b71-cc70-423c-ae23-8aaea1f535b9.json and https://artists.proofprofile.net/proofs/artist/e4b37b71-cc70-423c-ae23-8aaea1f535b9.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 0xc8a401e0ffd80d227c30ba8e267b2c3cbc2d77ebc07cb826fca20dd742c32459. 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/BCLXC2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d6537105ef8556c54c4bb338a0b3acaec061456a3426f4db52f331965b9146. 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/BCIH82211908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc49b0f1c0d297a1f73ee3ecd7252666b6494fc68060770716c1afc455fb2f3. 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/QZWDD2359649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf277f658e316666694e655be6cbceeb253557e283f2e57c06a70dbc2d11b63b. 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/QZWDD2359653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab613b15498420bab5289e37d4c893ee0f40fd92c4d62d90747817cb3afae3c. 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/QZWDD2359654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec778bc6d81f6f8d83afa81dc4cb7d04621c3a66f26bfd1eedda9a364c6fec4b. 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/BCIH82208367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21a40df7a418bf9ef89a05e6174727d41c1f8e6be4938827ccdebfff8b6739. 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/QZNJW2346472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a7e86dd6ee427ae029b65e8eb28f221170320b7a28b32e6c7160597a280ba7. 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/BCIH82206302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9804bb181f9b844eaec7c180054721723281274b527aca008904977a55f4b5d5. 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/USANG2237379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3cac0e3e047ce5f93fd559535ded98457f75a8da79fae49653205533f41355. 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/BCIH82206047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d53694f5a8e935a24d628975c4d6de575fd50ee9a79de5cfbc1e7bad50525. 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/BCIH82212874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67abda943c98dc47ac39f1a0bb0ae55b55e9064d668fd8e9fc47b6abe214314e. 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/BKOVG2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c49e4a292dd0f073a0749303355467c61efcae80ccc5ef9d341a00e44d52d. 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/QZW9K2379471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc83e1d46539f662d39dab1db9c1d043ac58bdb8ce1165fcabf3b4f6ca0347. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T20:49:40Z), 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/BCIH82206392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6ada1455bf9f5d29a2aae02b26ad0272528cf0733a9c6a7101da1a0db0cdb0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:27Z), 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/BCIH82206371.
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 0xc8f1f443b4ed77f64fb25b9a9c80749a8f62f3633c85820c2d24ca6e6ef37dde. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GXD7V2360295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6949e80ae51a1e02cda5f817d7e1a03730ac1fa74ef01632b679ae2dd96ed026. 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/GXD7G2428897.