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 0xe8003a38332ba8734f4dea38a84d0b11a278727da1e59437b27fb14a10e1d23a. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35069b83-92d4-43dd-b892-2989a5f8bf92.json and https://artists.proofprofile.net/proofs/artist/35069b83-92d4-43dd-b892-2989a5f8bf92.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 0x2390463ffdf9aaa30ef698828195d2f196401e33e8e594051a9fb4d3ac7453a6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA72178163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e4e1331df7fad4514aa3e59fce8facbd571914227886e8d645bfdc39f676f. 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/QZDA72178168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee57bb9e8e4cb8f09d15962f33b4dba4be2545d94b24912f8093609edb50c3a. 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/QZDA72178170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ccc994af0e41c31a6a71313c6c5df9abfc3b6f0bdec88977e9bad1c60ed09a. 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/QZDA72178172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a306a8efed07f5414b49b663573644ed55581b369d4cfea617c7fdb66dc590. 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/QZDA72178173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb4abc33b604dee69c12a3ce041c24e485f5e07cb33baa82d89eda4470108f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA72178174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4808af97ea076f3e9ee2768c699e2b5628ce2f2ca322fdb3e4d2641cae8f3c5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZDA72178165.
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 0x455f6d2e5aee1ebcf3dbe067f22e19d08f1809a0902ed51edb0801f8e3ea8a10. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA72178166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c445d09511f74da4d0c646a1ab527c08ac27bcf3589c9f68ee51ce585ff371. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA72178167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9733d2b29d44055e73348dfa2d6afa3fd3630d39059e2f0a0a3bbd8f91ad183. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDA72178169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf473c0f9be517360ae62ce2daa72c40e600b20ca7afa53e00f937197687c0cb. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZDA72178171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b80596ce1fc23c0a4edcc79a148a138a26064e1f8c008d6d0e8b7c0858266. 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/QZES71850453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ae9ebfcbd3305ce639bb0128a3d92da25e6e0fdb9fb59a74a620823f091a34. 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/QZES71850460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff2b0da3773e602290a24f9989f0d12a97c6acdc1af6ca3727b26aa584066b0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZES71850455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de3ee94794462457921299642fe6e1efdf3eff869c7d7fdc7f45c48074cb5a. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZES71850457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f6b01b5773028d9e64c38d9ae8ebf2a22ed35768faa247b117571081ed5438. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZES71850459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8956d7450f90c11fce221077539b9e2995868431ce0408662b3a2638a7c73ee. 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/QZTAT2464373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d08e1fe858be52d297b7d7389f23c28973754132aaa0a042c2b240117b3459. 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/QZK6H2401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be0841bb6951261e1d3d6c35c2e03d1562082ed599208c04f825f766a6059c1. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZK6P2242637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b95a142696e9a4dddb23713028faa272a4c5dbd10820cf2e2e2747e6ec4b02. 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/QZAPG1760093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e4fc12a7dac920c1dcc9ee6e26acd9fe4ae89d3ac687df920e04955c11720c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZAPG1760089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2122b28a4dbc40220bf4017bf079638bb1a707d2c1113ef9dca4c9e84a0fad5d. 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/QZAPG1760090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32615df54ff957ed4c26ab3c60ebc5dab60ed7386fd35f2c5b5e01ca9cc0bea7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZAPG1760092.