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 0x3770f267046c4c29869abd2feb0a37ed0cba9d67fa837620f7e9cbe9922059b1. 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/0b3966f4-f267-4295-9973-2b451f6655ac.json and https://artists.proofprofile.net/proofs/artist/0b3966f4-f267-4295-9973-2b451f6655ac.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 0x6c1a118a5dec688ede64e985b9e775707536ee0c79fc808c8049596f9cf305be. 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/GBKPL2283999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b8c21b8e106fe1f42085a89fbf9d3b9ebe359b7906a0451540743e475c0aa4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZKDT2200433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c413bc4496ea185e9032c802c3ef33578b961baed2a553259814a8b4a3d26c. 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/QZTV32244397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fb4dea15c8f1572128329088e7cc56b087db40d5146675a3e1c2d773139f28. 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/QZWDE2344147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61be362bcac146e926bb738d6f93dc64f9f81a14cf7cf92e95f718ac1cf5231. 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/QZTV32389168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38fd48160c8e858906efef69d55428592c965d1e5b81f49c95cecbb6d0d2c4. 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/QZKDT2300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af220530cf3e464b6ae522d0dc82e1a3f0a18d8a10cf240d5c7455ef8559960. 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/QZKDT2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f3fa6efdadffee3863324d6088495ef9120d8ddaa81faf06c30fa0a564fd53. 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/QZKDT2300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2d22dabf7aa409a8defcb59eaa9ad79992c7eb324fb7638a6c08eb0b0b6499. 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/QZKDT2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49e2fbac6bccc73e25b2d02fcb622585dce39cd76e97c0f2ae0ca55563c4d2d. 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/US7VG2343529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c53f5260edac8e36d2bb944375be95d33db1f256adb0aa4bbd927849639b18. 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/QZKDT2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ff9b53f3d8f7c09da01796483b56350b9281b1d2c6bd431450e1ac59f3a5fa. 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/QZKDT2201398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c69649ebce5661811843a0c86a65ce2305ff86ca3a447f3c367dc2e37fd2c4. 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/QZKDT2201145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3705c347af01f4f2b86366b1c4f67ff284a968d8054f91e5d6a701007d2a2d5f. 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/QZKDT2200977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dc3287468ced5895dd99642d09094707beddc3311304b7d0e8b3bcc1a23e42. 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/QZKDT2200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3329ca6fe69ca58f4a10e407e2e105ac5c37571bc5aff58a0bbb0d089a0e28e6. 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/QZKDT2200861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf4aede178dd5d190cdaf19d765ff2f756e5321daa7b520df85332752bd6ce8. 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/QZKDT2200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8259d4ce893612d55df5079167667c9e2b091e3e0e2ccd329401c84531dc2d. 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/QZKDT2200635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea5fde257bc3038181b2849de7fe3830ca823ac211a97519acd2112e3b7f02. 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/QZKDT2200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2726f16ff5d18006416dcafc9f29328bf78f07dd29aa02de4f6e093258642b49. 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/QZKDT2200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85baa963c71d173c8696b5ebe7ecea3267b96175ca5cf150ac1c259cc36d8043. 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/TCAGB2239655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b460f697569d8152e8f9953556ecba2b7d33c498ae5903f9a2fa1f1fbe3aba. 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/QZKDT2200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5cb4cf0305e1a4fa960a678244d5d7a1adc481aa228a68a268ee7e2ac3bd3. 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/TCAFG2070213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32229c1406005f6c057c4277d332af94f2ed14c0807902b3f051d4c6fef51c3c. 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/QMDA62163315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1d8dc6dde050ddc7d2c59ed30ce5509e20cfe1e50f95b4ee5b5d2ca473fd3. 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/USDY42194085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eaedad24d8a9bd97db00a27de6140de6e6a8594e09302d46b15f95128b63c2. 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/QZKDT2101354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadf7310f142fe8bfcc046e4925c318091392dc14a6d2900c32ddb8170954e9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZKDT2100707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b7b669cae92f8d6fb09b5da3e0d1f41ae1b09f6b4885898e81f12ad632c05. 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/QZKDT2000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b072f08d854a165f58ef5563994185e8d22b9039bfe5dea21ee1c7db7edcb5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAEY2076763.
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 0xc68cd39aa1dabb9aa7c95d9f01d0b2c95b6668e91f49f8459c8f00fc5dffe129. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZTRX2110457.