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 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 0xd649e4e6cdbea1746fca0454b0db0fe00127d1c2956a5091fa84ee2e2afe5a86. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/156547f6-7351-4596-8fbc-2e50b1d2439e.json and https://artists.proofprofile.net/proofs/artist/156547f6-7351-4596-8fbc-2e50b1d2439e.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 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 0xd2d7c7559666e1bd72a20edf7728e59b8ba8f30b22c798c7091d94de563eaf31. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESAAI0257230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba349713ff4fe8be63dc2b07222748a2fb2c3c0552989906cb61b6e57c6cabb5. 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/ESAAI0257231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98cc3cb93b546fc2a355caacdfdaa05e93c1fe2a76da8b6bf4d53eda05a6fff. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ESAAI0257232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459a3830c692312ad8e78f50bb0c817c4845184e78bec1ce431c5c2e3bb614cd. 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/ESAAI0257233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553cd0af8c7b8d736dc0946c51c4a76fe14e2ad28a5c69b8d036d2aa73485df9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ESAAI0257234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cec4005cc50ddfc355296f57eaf219ea575df313105e401a9c96c347441be9. 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/ESAAI0257235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6cf595f6b62e00c8613959b063f4844625558d0b4b698c3840c50d01294610. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ESAAI0257236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11b38d071b6a3ec7e9e43b2a619260a917a0729628e141ae0da1c0b76d47fbe. 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/ESAAI0257237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b9f2cad0b6cdb5923ccbb2e970aa950d9a7e8764423d28974ce6851adb51e7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ESAAI0257238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c60ed6b612c2d2c1c504017a9aef02f6f5b28364dae81b1de62f6a890b45a78. 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/ESAAI0257239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60968c21bd745434a93034d93525fd9ef227c2217a18b76be9e5588e9c4373d. 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/ESAAI0257240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2082cbe77feea73c002e95373f59491f4a0bf103ee3766b81c1a7d0cd1012d7. 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/ESAAI0257241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd376876ce69df8e7e0554eeddeaaae8438e082f353a4868218d8f0e8a0fe580b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G1404752.
Inti-Illimani, Tributo A Su Música - A La Salud de la Música Chilena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f148b86ca6345e5ba8627345a588dd570a79c3ae1c0fc4fa44cf15a14afd40. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CLAB20902866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1540733501f6e91f0c09c186ce5a0ee3c783b86b82d259cc37a009a96af0488. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USY282005617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0320a71a9e673676953f2cf0c06cb04f9741e955d874692a619f9efd75fa48. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZNJW2096012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe837df5f41c510ab6fc2a1267a9732f85726fc615d820f37cabfd1a021ad1726. 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/TCACF1598647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d84f9e8db93c42462f5216c0ae89176dda3199683bb092beff624d491742ae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZW9K2290123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823096dbc85a3b11f9cdd0dc35544993019548174f3541df3ba3816743947722. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9K2290136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20ae7bf35918e0d2e74e2ab8f4e63c2a38d037d1d31b6361f737ba4c138540f. 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/ES71G1404771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd954c96933d72f7c36ba4be8586cadac4a7306b2bfaf09d9c8a0d52cc6aa1. 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/TCADD1757978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a31ef773d0f1e8303023cc931a610d32745e1a32629a7640e59b64839496d11. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCDAF1765953.