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 0x3c9ec0c279ffe265aed716258c42410ac40a04fb4383e86b812d0eb2b6dd3607. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27a6a71f-847c-4fe5-ae46-c34386f8b220.json and https://artists.proofprofile.net/proofs/artist/27a6a71f-847c-4fe5-ae46-c34386f8b220.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 0x7570d12046e23fcf7a287b8da25309f9946618b66330dfcfd7913077666cd3eb. 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/AEA0D1849541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e92c91530151e94c4540c6b26e77d286f4882b1659c25f27ccf62277b8afe5. 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/AEA0D1849542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aac585933f049f11ba926ede3f27bf2b19fae27fed75640c2cddb4b161c4b3. 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/AEA0D1849543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c61fb965debb76cb28d950ad27fba5df2944f12e52233f8151b07c7097b7ca. 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/AEA0D1849546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f85c12260c14e828444e036bd9e74252683f347828cac7f103a998958dddd7b. 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/AEA0D1849549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512d72b833fa48ff3653f1495ac33741547976b510db4af015f65ca7a1acfc39. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AEA0D1849544.
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 0x5eb6db900703abfb89739db310f2dfc4745b4c375f2b3b471a4b397c80df1f4b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AEA0D1849547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a62ce8e21822d4b64fbb6b3687794a76d0df11b6fe34f7fd04ffc5a51628491. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AEA0D1849548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ceae97b1c8b92ec8451dcc1d00d0d78c23af5dbfde1797f32ad830df2c1f0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AEA0D1849550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8606bfabfdd7d8d26586e6413762810ba87182495fd8cdaaa543b89cc2d9a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/AEA0D1849551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28481367a4245035e4a32805768678342c603b6ba4e9c2f3f60b0fd17bef5cce. 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/AEA0D1849994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb658d5876cd892cf324f2e8a4a23d697c4f1b3cd1ddd1ad5b914c63e6c632246. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AEA0D1849995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b0f536ff60d0bff858adfa13c1298bac25c7a86dd3722d83327c3006d410d. 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/AEA0D1849996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49de9bd74779df9f797d6d7fcd0f94e8fe773929c0ec806267394eb9dc2b089. 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/AEA0D1849997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d08ea743bf0ddc6386f8e0df480792b09efb0a43b3a005cec34d570a4f9ba7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AEA0D1849998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a23f26daea2ac0441b3289620d746388c4e8a2ca7bec13f7e204db1c1a5a73. 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/AEA0D1849999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72b8c2786cc0e2c917a140f2e02e1675fed449aedf3daa0c4612e8f3b96b22. 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/AEA0D1850000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde62946cc98cfb103e0ec37897dd85b94714e2ddedb1e81a9250e5beb89adf6. 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/AEA0D1850001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb4a9d1c46c9ce255b57748c561cd04557a4be61b254d6527e6444b8dacb160. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AEA0D1850002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe0cfe47e6b4f0f02e3cc8e06037e0c995c9986bdecd6e4a4827aef962fafa2. 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/AEA0D1850003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afd6979769853fc521e60952fb6165236018cf950404f862765c374340be297. 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/AEA0D1850004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4747d2fbd65d0ae426d6f0b4bdcb9d5d77eda2f661ce915b5a1eaa480f051069. 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/AEA0D1850005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a24cb6c1a9fdf6dbd999f9e59f8e0074e3b7290b05e1fcdafad4def6bd972c5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AEA0D1850007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53337ce736f79a0f1c1c98795a55aaf28c009dc7f300267d96c21c98440c49c0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AEA0D1850009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba145a9324da215de54b45acbfd182318015649c8ea397d3cdd23ed691db1828. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AEA0D1850006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a853681270b93d3cf3a29bc267f5755f7b562b4035842c7ce960284a3dc5889. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/AEA0D1850008.