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 0x9ec04173674e442e27b710ecac6d86dd607f3ab18ff2fa90568a294776ec4bbc. 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/e4e9c30a-eb92-4332-8c1a-067f0ca16de9.json and https://artists.proofprofile.net/proofs/artist/e4e9c30a-eb92-4332-8c1a-067f0ca16de9.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 0x69134d7c27c6bae79747d786ae10006d7f8751b471e911b4e42632bd23885042. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJX2187205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bd95cf6551bd7aaec9a998ef31673650b32a13b1ee32e7daa6a005b6a7516b. 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/QMFME2367324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b70154a4a1f6172204fe255db0a2df268573594bd028aec3790ad21957530c3. 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/QMFME2374077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fea942497063120ee4f0c04eb5de8e3ca20b6e6a638060f652192912b3aac74. 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/BK4DA2508608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe028bb123d4fc26d9b08197f96cabc6b7ae89a18047bbc3ed2ca67d857b9e4c3. 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/BK4DA2511762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fea942497063120ee4f0c04eb5de8e3ca20b6e6a638060f652192912b3aac74. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK4DA2508608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f591cf39b330d67efca7208956eaf9b5278badcc534bea474671980cdefa4c. 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/BK4DA2510557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee28c909319959320e9bbc80ceda228090d6846ee243700113177a9161e5560. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2510559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfd90d145e612819cd90e7d1d50a65701d75eed092ca51d50195b26abc3aa42. 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/BK4DA2451363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c7858b964ec4852842329a40a743ddefa84f003426df44c1528dbc95878249. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2510846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185125ba499fb5a1d7fe725b9c56aef2ff05a4c804c1d4de328a30c4f938ab5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK4DA2511766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74386ef0179a69791013a748add62f9ded89a73b33b846e14da661f4a5f9a281. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BK4DA2535153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa664e9305b1db2d9666a5b29fec840fc13432f87140f5a16d8e831602ec16476. 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/BK4DA2407507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff307fc6822460a8aebf7fbaf8e0cd1fe445eb619b5674d647c553f919c6b7f9. 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/BK4DA2307946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106bc824ea588c2c86d9e30fa2734f3cfddc4aa41b8ac9225abeb4f74e1a9276. 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/GX3Q92383069.