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 0x5a263ed86403ed4c29a78048db5b78ac8b2500ea18611de4f1b29770bf3c619f. 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/ef4994f3-2f12-424f-af6d-482a32e6732f.json and https://artists.proofprofile.net/proofs/artist/ef4994f3-2f12-424f-af6d-482a32e6732f.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 0x9aea27b4b56668973b7424a4eaee17219f2eccc57ae1ede878b50748f5dd1ae5. 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/DEZC62362556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338dc28457de49b946c8397940f4b28c5e1377ccf0145b20bc6cbb1c2bf77438. 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/DEZC62362557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f84b93d2927c59136cd066b3c5ae1b0f2ac8cbd1ae25fc9c417fdf0c2cd005. 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/DEZC62362558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ae13dd725504a77c90cccfb81d8d316f5b0f42adc8cf52178e41befc1c2667. 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/DEZC62362559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3f4efbfe30888c234a810cd17e588ced6b3cf90d6e274cb3fc9ddc0c9280f0. 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/DEZC62362560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c39a50ecc0d19d852a6713eea69586b6a241c4c9a3ed63f5fea9abf0bc9b057. 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/DEZC62362561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801c86218607d9c6b5b5e90a36f1903a6976faf8e12e74ef9c8e27f8735885b9. 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/DEZC62362562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4e867febc99e2f56e1b4cb8b40ebd30865de17e3cec1259bd5ed910d3b930e. 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/DEZC62362563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab80edb7966a3b8548f8f04e3918ffd6c1f49fdafb7b6b7802b5f34408e007b. 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/DEZC62362564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc471d921b842f35f3512cdc189f2c3eb2c3e247c4fb2cc45bf7b75f82d0f85b0. 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/DELJ81813629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac810b27d89d86ba888ebacf05d49bc8d14515f9ab1e01859e59500b5adc10f2. 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/DELJ81813630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5046023f47ff925ee2839e05e42f3d2452aeda5dbbeb35abb6ef1b7e65044. 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/DELJ81813631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc55f7f7518c451d7b8a61b69b881320e552778f660efa43132af4059f7fee5. 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/DELJ81813632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27fca4c048ca7421ade6e4b40de1a83c0a29f20104fb69ecfb80e43428e7642. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T16:32:16Z), 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/DELJ81813634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73e8be421a4062e35eee1ffd83827fb821d783601cdaa76cd61265aa470730c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DELJ81813635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562e9ca2fa0b6df629b6c7ad54d30d3c930c589f35bd063dec0d358a1dfbfc5e. 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/DELJ81813637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b557fddcc1617cbcb4e7b1de469c13a9ad5c91a85ba8b47ab5c7aab0bdc46. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DELJ81813633.
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 0x683d27eecc41f0ca015f2b06ed6d76689b7dad3ccb84b46c5e9c5dee477f3b51. 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/DELJ81813636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f1af09d519609b438619164289a9207f537d4c204b5eeed8a11dff4abf6b4. 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/DELJ81884865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc639417b5a636badca6b4229d082bd640a6680b8b11d5918eed77743242cce. 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/DELJ81884866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba2caeb4537f8a7b0ac7954838430ba3a39cd3aa7153cd4ee7264392a3410a. 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/DELJ81884867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8475dacae78b6594dc58807b47b3923f117bbc1ac87fa37f764dea2c091c04a1. 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/DELJ81884868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2907d64a1981ed311d5869ad84807dae9862085c35c2e5fd914c32509b7b589f. 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/DELJ81884869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5c0b73f455f4b73ed8afe039f9e581bf675a3f313ba322a716ac6e6ff5820d. 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/DELJ81884870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac8c427eacd8ee9b759e158610b17f1a6174321d2a6c970e878f203e24ce3a. 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/DELJ81884871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dda6ff841f4895025829676d87de63fe7cefd187aa3b2085dc424f9886d663. 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/DELJ81884872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484e3f028cd423412d9ebca1e6e85ff447284b33bf61c443960a60f146bd7b67. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DELJ81884873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74abfa517b1cc5f205313a2b9d8c585d0be9948f254c2f0965955bc8b408d37. 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/DEZC62361649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36101e3dff30c5542d6be0a89c64a77503bb8c5087deb0750dd82aa28376af13. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEZC62361648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36401b244ffbdd6eb73f1b1aa1f656b8a0754a147c7d713e01393d431d5fc1c. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:24:19Z), 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/DEZC62334471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd5fb98762175498ec443724877c113d2bf78a45039a6742b638a0549bb0b0. 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/DEZC62274005.