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 0x9a32e917bb4a073e4cc56e668fcf3dbe0b60cdd16b5b9eae45adc95374bbf92d. 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/b955be8f-158a-4885-a275-8253504b63a1.json and https://artists.proofprofile.net/proofs/artist/b955be8f-158a-4885-a275-8253504b63a1.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 0xede7b58eadcaefd8d958e9cbcfb7608caa617d098a520a1c126932defc15ded8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QM24S1926123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccac4aa8dd342dd494080182c7b7c8cbc5c018294f14bd37711af2560f13c35. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEVU52069832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f2ebad56ff074e4e4ae746bd7b14355156a2261fc97ae9407fd80ad03c8b65. 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/QZ5AB2336891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a53ba15fcf495b75760324c876ff901e26fc9531648dceebf083e7b916caf. 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/QZNJY2398379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d38dbe63a5db88cc9a5e85407755bf3e083047f0b70c3828c5938cb4a9cfb8a. 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/QZTPX2385895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26767dd09e2d21e6ca8f941fe8898399edd3756806ba1f9ab7ea85fbee2062d1. 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/QZNJW2436055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0186f4f3b1761a57819ff3de9edbddacc475bd5f512cdc5ae8336b1c09cf3. 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/QM42K1705831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9c5bba7712c586e15727efdb2dbd6f2b7db46d97d73f211ae04308b16f25aa. 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/FR96X2444250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d94e914b0e70a1c630c78528eda2a34c82a8f67cd0fa9a185525fe8d90ab83. 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/GXD7V2366250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3126498dea48e665281384fd0ced734a4437a7203c5986dc0f00851296271621. 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/DGA0P2302745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9e626f8d9ae54eb7800be71c09194581181819821105f67e466e66307e897e. 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/QZTVM2366551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b11c1d4ee6515c1ef41701bd7593b6ba0d07e80a04c117704f33c6d678e443. 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/UKXN22330595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cfbe051f3b6dc98928d6a8db31fec5159b7c1d63b2b5c174a78d2c593f228d. 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/DGA062317659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e2a2e0ee54c7b7c1e144c07b3b89c07da3e6b1ab084aa3a739a0c13f9d47a7. 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/FRX872300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d5d0567399c0fa9414c6b9f8ad6530dfd22d285467ebe8de2610861c54d55a. 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/SE5752335168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d10efdbe882d28bc3238f17a2a4742f528aad1287fea7162e57292ca8d7ce3. 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/QZMZ92462785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0186f4f3b1761a57819ff3de9edbddacc475bd5f512cdc5ae8336b1c09cf3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM42K1705831.