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 0xdce983c5d168a535d3140e97af11fef8c5128648375f72fcbfb57c79c79d0db2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c3d8c74-270f-46c6-9e54-41a256b118e2.json and https://artists.proofprofile.net/proofs/artist/6c3d8c74-270f-46c6-9e54-41a256b118e2.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 0xcb38fd50ccafe85ebf5a9dc05f85c4ad46e0717aa2ee12c8f3c9c3e891d5b213. 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/TCADN1872590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9dae09c6ebd8172d2bb9a9e1fb5000288780c63bd985c436cd8d9cadf8fab0. 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/TCADN1881883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e95b04088fcf05e0f0202a53e471884552220ce3bece3048627e87fa807159. 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/TCADN1876108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8a2720a7d3f3ded76fcfe680f0bf043d947b848a48de93bd27dc3bd991c6c. 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/TCADN1876115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4220cdafe350809aafd3be02090e2d7b2b032a0ab9fd8ab69182e5fc96307fbc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCADN1872523.
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 0xe1852e3966592f3176de160e9bf4b0c6b1b69feadabc441a8403441385e5cdf1. 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/QM2PV1890889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2f8c3d00315fccb4d61690b17a4da9e5d95a90af3fed1fb6ed88b418ec1d2b. 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/QZK6P2146155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bd28be4bb2779d8e468575cf0b5190306e7cffdf91980d0a14841f8a891a41. 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/QZK6P2146157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c6214f6debb475170601837e5608e506e0a8ebd7f6fe5defd2a9496a5ef56. 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/QZK6P2146160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7430f40af75b0b1607ee20d95a65293ee6879b6c30681e6b9265443ff84188ce. 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/QZK6P2146162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641677a87b44083b05e4bc5bce66e8204739b4fead8e10da835534848187ba1c. 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/QZK6P2146165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a9500791aeaa4cf0e2baf7d97385fb81cbfc15b9711d9d2c1d09c736c0fd4a. 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/QZK6P2146167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa520b854c4607269a0286efb880cdf9659b39a9637e472ab4b53600738fbb1cf. 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/QZK6P2146169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7949481af5a7d0cd78d221fcf94208215eddeec55cf48891cb0da607f34d73c1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6P2146158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56a045ab9ec9cac5b9ca06085fd9359db1f6b55a0fa12bd5a8a29d40e5a296. 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/QZES91989688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed53e752859f0d0671d54b6cce09f6d480bae837197e1dfbd8ea99e72f0e167. 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/QZES91989689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7746da95cc5a3a955674dfb36d24d65473fca1235ff2bfa62a12aded82a2bf. 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/QZES91989692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf872160992a4f048c793989e225292a29720e5c494a18d1ea8b78d7d0c4d5e50. 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/QZES91989698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5fdbd9a82c7338f27d9ef8872806cf61f6d4339e621d4bf410a568e0072653. 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/QZES91989705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e41b5f27387f6c820a3f38d470844a6fafef3e6777a7ef691da4c339f32ef82. 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/QZES91989716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1379afa06a448689a37f1c5d4bcec69cf0ba0a71222e92190088170aa476e86f. 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/FR10S2008486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e242b6f6ae3f1cbb7c291a246acc7573485f8fe270cf1e0cfa6b1d9302f1ad. 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/FRX201920947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d96305bc69b116d73a3abed53ffef5b544d100ab7f9a654d0eb592b9e1ac8d1. 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/FR10S2008487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b155abaa26a7b0fbe8a5d31b979c9171f1f3c2ab26dc309e02cb75a292296d7. 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/FR10S2008488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5dc8b4445dbf5562e437afb3cd146f9d66033e6a5040bd8963db0ce9ec5252. 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/FR10S2008489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8cd3a76de7ac09dfcd490b2d8153d95b6b673e9076fc6762b72c1b9f42952. 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/FR10S2008490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ba5f2709ed2a5f2184b1078aa8f83dd5f66b8af736f30ac0f1fb49746e2fc. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR10S2008491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89388c06389c2c038d804444744704ff385def4504affaf1e04232b45d786295. 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/FR10S2008494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1988198416d3ab5d990935f956690b53768a11bb2db0b8b6c9c6efea3ece6. 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/QZDA61991226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7714f3e7c6e278e828c52f25af51de9fa9e9ca963007215186d128850e04c5. 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/QZDA61991231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a34d0f4d019ae1b94e69a892a844e4905e5af917d057b7df92b7083910e64. 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/QZDA61991232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b4b4ca2295c57987a56cde174aff1c16842d1d2f4b93aef0d9c801bd6a69c3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZDA61991227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65794e5bacca004c148c904670bd8d5b7f6066d441ae5368c542e02d0f91c9c6. 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/TCAFM2115769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237bb5210d1cec299e540145cfd1a48d2c15437d436bf6acd441ec1d48edf89a. 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/TCAFM2116021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c69c028df80c5eae3dbae421c6e3519a64a0b43c3bcb5fcce25cf1bbce3d1. 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/TCAFM2115832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614d58e9883073df738b11cc87162d48979af8502a14ba178854c75491a5abce. 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/TCAFM2115849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df5a72fdbc9daf6e1bddce7afe13304b8a89b00560dbcdc9354c154232a0d7b. 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/TCAFM2115861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129cec0e484cb22c8b7cb4faca15ebf4a4e4e036ec9fe61c34a28682309cc34. 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/TCAFM2115876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f580fe5a9b96db9cf3ef073c6be3a364d070670942536eec0f54016b22ef0c5. 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/QZK6P1904201.