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 0xab35eaed02db5254983d472683372a32c3dec2fc081ed2b968e25429737d53c0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca4b72d8-aa4c-4c24-90ff-36a4655f9a7f.json and https://artists.proofprofile.net/proofs/artist/ca4b72d8-aa4c-4c24-90ff-36a4655f9a7f.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 0x58689d037d2faf41ad0430e4cfdef0d7728fc5e084a50c86fa3111f47eabf8c5. 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/DEWO71700585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca70d8b6704793044a9309e6f18f4b731dbcb81d466543f83beebf56a199b5a. 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/CAQOI2302908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ecdfb305717fe02ed6479423896fbd036d891447b8f7959cc3f6862224edaa. 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/GB2LD2320179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd605b08120ad4c0ec03b81285244da33e40c53368d56009f548e11d13c55dc2a. 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/QZTV32389662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4551086dff0f7af3016782553a59161975f51ae7ce4681fb75c25b5d84ea42. 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/DEWO71700570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b73bb3cba49a910c1095e7ba822a5e7ea6f1d6e3de1b186e4cf55ac348ebfb. 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/QZTV32317130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd436a56c22135fc290f9a252db1fd29e9bf831118c283a7fd6d2f0d9c2f8780. 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/QZTV32317144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50b9b69639b662a8b8b614774bc5377c8606a31e75e6e19bc1bfaf96d853bf2. 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/QZTV32314464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9cf189e29dfe2595a7cffc6296e19d5475f4fd212b453ed6d18e6046c37e29. 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/QZTV32317138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe537f62582433d4d2da98ac7246d8b1956c56e5aeb45780e8f6da83e0ad3f037. 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/QZTV32317111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff61a300d37346a864406712d6bd07adc53115f4b0e2a9dd5e0e0e2fa5b47c. 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/QZTRX2339174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b6a47f7e2fd4af76537e121c1af858928ce1b3acfd9ed4c71b1f6a57b318e. 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/QZTRX2339171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d70ddbf2bf1741d0f41518416eeb92a00b9ed3594e708370f1515962143e9. 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/QZTRX2339173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463ee9a22521081c914fc5bdb688fa21fd754d49d459f4f7071d090ce1b85fed. 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/QZTRX2339165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6a6a1fd2d38b45c2c37136918170a5af6f98cff656c7e968bd62b54ace7571. 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/NL5WB2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919fc3120202ca4497ff1d55fc491f29ba406384b647aaee5539131f8607f13a. 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/GBWUL2375181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0dc2504284ad94ceda0d85bcca1bc4d4e9284cc4259f274222cba7d38629be. 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/GBWUL2375205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f5adbfed8eb69d76c1f643e57f8f1f3dc5eddf1324a4593fd22255e9b0807. 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/GBWUL2375186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2787054028f16b57617d616e73a1427831211a1100d43c23d461076fc95f10. 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/QZS632394889.