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 0xd1b33a881cf86fbcf2cff2509f03b4d1eb75890af36cbd31030d2320a8faecfd. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b5c29e8-4b54-4d83-88ac-ad2b28d98f6a.json and https://artists.proofprofile.net/proofs/artist/7b5c29e8-4b54-4d83-88ac-ad2b28d98f6a.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 0xff65fd684eb33d0db97a7a74f025f44e9c248e2958b24995b5099697114d2722. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFME1586804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde97ce38e72b47597d078f05338dbd975ea6536218abd1a1f8298c58a1925d62. 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/QMFME1586807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb626f7581558a23769b61aee532916412ddd430fe13f598a0e420971a84af480. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMFME1586803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31585eb739ed51e5ee15e85f02ef029bf8efae7b97d3bd1a93041cde04006877. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QMPKX1662151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520367bcb3547ba7909145469ae757095bbbb78fa01a1f377bf0a72efb03a6e5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMFME1586805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feb8819bf67f8c2e79571569ec26fecaad00f73f7ac48cabf88340468444746. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMFME1586806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf03962401096e1c2ceb9485a580ff445c6e3e145540911639109d6046cb54a6. 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/QMFME1575370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de9ff761d38f80a620e9413a8162332b94dc0680eb84d32be8a8d145975844b. 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/QMFME1575374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c2b1f11fe9dff39d3b1c0dee984c187babb5dbceed357e980b732340579ef. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMFME1575369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23dc7f5e3e312bd1ff2339fc5f1e2fe95bd77f06360ebb0489d448065e1039e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMFME1575372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f94a9de3b5a0e0367725ad1e9a18da0d2da9080ccd185dabc7a2a9e8ed3eb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFME1575373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc922fdfc691a04539fdcb836b9e07db42c12118b0d7bfbe53aefc6b2a45e4491. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMFME1575375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292031cf0e8e88a44dd1875a06d8c05d35d144e0dca3d540fbe78b03fc41235. 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/USCGJ2187661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606266d55a2549189fac117a32cd4a3c7c9e3a6b12d21c29ade4ec3fe554fae1. 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/BRTRB2086073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3239d6e0f1e8343dab0068ccf4414bf7ed8f5c4757dd3dba170e99c26e06446. 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/BRTRB2086076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229a45bb11382ec78bc03088942e38aea74df375496f49e1844bf5ada0534e39. 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/BRTRB1909384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81b25de42e1d002eb728fbf98b137fae45c1b6709526b0ce1858edeb6d0923. 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/BRTRB1909406.