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 0xab48d3cfbb2ca87fb7c4c3b4f96e5f5ccf0e65434cce0e75d1b493d6f95c9b02. 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/d1e18acd-111d-412b-8a9c-c9bb622e5f10.json and https://artists.proofprofile.net/proofs/artist/d1e18acd-111d-412b-8a9c-c9bb622e5f10.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 0xefaafec21ec5d9fc5977c983d6094fd2cfb0a290b0f174dafd2ea6318c13f31a. 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/DEZC62118126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5da4f6f81089a2bf5bd93bef67907f2af1a6ca6cccdd79f0edbb6c606c6d66. 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/DEZC62118127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaafec21ec5d9fc5977c983d6094fd2cfb0a290b0f174dafd2ea6318c13f31a. 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/DEZC62118126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374802d30d7761fe932a6b3f01caf4c8e435a3b0ff6bf1cbb5127a216aa29c67. 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/TCAFC2011536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97db13406e8e9a1bd6322cecb491fc86154bbcfca707b1b077d9954ebe368a5. 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/FRX202277960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c684b2101a94019eb86b59185f3e2bc5ef1ee0b55f87732218633e8dfc4e72f. 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/FR96X2301860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ab9e310596892c55c4bbb953e2784a03c4dc5338fd568b9a3190be91a46a8. 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/FRX202277961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa31c9314a2dbb0c6afcfecf4984aaef40d1b222236f24a291a7c6d6c9f3a0f. 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/FR96X2301859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19abbc6ea279379db991e4bd8b76f4af1924fdcf25005c04edc97ec80fb9c019. 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/TCAFC2011534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5da4f6f81089a2bf5bd93bef67907f2af1a6ca6cccdd79f0edbb6c606c6d66. 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/DEZC62118127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe458591b7b39edacb7391d6877fc6e51af8ea5f1191e9e945db67718f922e9d. 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/FRX202277962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa31c9314a2dbb0c6afcfecf4984aaef40d1b222236f24a291a7c6d6c9f3a0f. 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/FR96X2301859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c684b2101a94019eb86b59185f3e2bc5ef1ee0b55f87732218633e8dfc4e72f. 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/FR96X2301860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9caa6b495b6ced888965b9cc183fe871225177adb448fecff73d603a4bcad20. 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/US4MK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97db13406e8e9a1bd6322cecb491fc86154bbcfca707b1b077d9954ebe368a5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FRX202277960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ab9e310596892c55c4bbb953e2784a03c4dc5338fd568b9a3190be91a46a8. 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/FRX202277961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe458591b7b39edacb7391d6877fc6e51af8ea5f1191e9e945db67718f922e9d. 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/FRX202277962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19abbc6ea279379db991e4bd8b76f4af1924fdcf25005c04edc97ec80fb9c019. 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/TCAFC2011534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21f2acfc44a51342c457aab3b83ea8e7f7033e918dda29d0d74faf7223fb70. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DGA082367037.
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 0x7ce01962bb2175910be2b304473c49b31444c6bbef70e96908c52e803b421a9c. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DGA082367038.