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 0x22bf73038e4b1960eded6543971f1ddc01f194754708d86b7bd04894aa72c541. 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/a6f17e92-40a5-426e-8647-981523aaa341.json and https://artists.proofprofile.net/proofs/artist/a6f17e92-40a5-426e-8647-981523aaa341.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 0x78407da4530c69774cba94c96806e224eb2f1f3ad11151f7771d37f83f0f8261. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH7812067922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0969dfad1db17ea4ab5d62a0b5575654270b2067150e60c3a3efe04454a325. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CH7812196475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4901f69126fcba00ecd675a5ecaab9485a1e902567c36b194b2b2ae9b3b9e6. 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/QM6MZ2277694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618710d5cbf78c9b9e5251f74033757dd736a97c1dd0f6667a5626666271272. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:08:08Z), 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/QZN882242256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9fc20d938c9ab9bc3bc21977353d11394697d6d4fa4a292898ab670383a2b8. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/DEXW62300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb85c9f310a017727bed8bb75c9f2e9b12436683fa05ca4eef0f4a65872b6bbc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:04Z), 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/UKZGC2308786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0e216bbaef7142d8aada057b4db3d256c0e774c4372639f4fe59520ee416a1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKZGC2406471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe757cf76d562384570593b70f0c6808112374bd41adeb50996c9ee2b4c005aef. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:30Z), 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/UKZGC2409914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bdfe0bf879c1b882e6e79983df7e5276185c777c18c82484ad406e3643692a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKZGC2501302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba008ff0a7ee01294d9cb3bca165c17e8eeaea014519e4e99b0eb7717fa40081. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/UKZGC2502946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94edb1472d8911f10e9313853cfb1c76407a729c23a5763bea10cb3496945c12. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH7812102914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceb186e1f1dae635d055d4ec1e9bb5c6d044f10d8c3f096dcca96ccf0170a3d. 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/DEXW62200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9c257559f1250ee5fb01499c19bd1193b9334b382d58844961019801654164. 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/DEPI82314613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4081201310b4dad254d60ae28d919cf38d70b859ba6b6a8675bd483a800e4e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE3GO2201401.
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