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 0x7883239516669da5bbe89013981ffadf0d8d1e17e3ea5d137d8b73b759081fad. 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/5327a8ed-1b1d-4738-a813-4662febb0c20.json and https://artists.proofprofile.net/proofs/artist/5327a8ed-1b1d-4738-a813-4662febb0c20.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 0x0426b2c2ad0fa80ca318e5d8b85623800b482a12a819959324bd305077ec26b4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c54b27b8d5bc793da3e461ff6e77db2a92d7823884aca23ae7f1ad485a00e2. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:40Z), 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/QZMEN2026292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25bd58cd1a9ad092f09553ff93b8d5745e71b04fe11d942c49e2ec436f6241. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYY2169599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e654fcdea55058587a5e58c543b08ae7efdb295b7f057dd91a1f3a1ac232f. 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/QZFZ72136311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17dc8c64f657133cb8830c88e56bd443c3442ef02998d02ab2cde0d59b5a2b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHN32173547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22a661c76ec8de9f25995eb6bf1b3969c70649330f958927f174939548060d4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNB2159088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb81f17fcd297e2b449ec99cd5aaf5c4e2cbfd601808787825f090682744daec. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZK6P2146437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d4e5248c3f0ee86824c7da0abf635397b03dc90cc47e8a721eee6f7f70542. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2189086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71d869b0ea6003a872f3b7edbb7f1f81ce6c9e01d1f0ca4eca6a7d898104873. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2189088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83be318a38768969c3825118e06dd84a3c2e154703009a337d6d9ad5ca97de2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWU2177862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a212a08c2e05fc000621d1ea63a7dd2f02df76a10beb52481155db6d8a65bfb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:53:54Z), 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/QZDA72232292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec5bbb99f58467eddc39080bfc518f38e4274e5165317516b5f84458c66f395. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES52265216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39bf3810c6750e60f70ca03f942fb1b7fb04e988cbc23dee87caf9d78e75d5d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES82254230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bcdc0cb1a7f75f0ab5a25c9f50f8a37bc775fe122a320731e9561c524ff5c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS632223227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e1688b005c53672d4490b8591e9a8152ea855cd8de85ec748a3f9ffd6e7ff. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6H2248996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad27fe422efa6471e1aa3a666af1ea98266aa3fb96820fe34a789ad3035f3b57. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6H2248997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53facf6c5873bbf677d8284ff79d1166e47c1d4923786c8a82a64d8eed3acc7c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6H2248998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2032efc2a1b0791990117fd208bcfceb830495cf0db1b474ba51f3dcc42da312. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAU2272455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd764a58bc6f7df80358e0c7db9c0ffa1e757e54d3a2de77ecb81a6f4c36bd1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZES62304872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5f29ec4bec534268084f33491897bc7c4a034fc8f1fa3b6f2540f354a4a270. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6G2305129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad9d4f8a04775d3721842c95e2d5289802eef0d37bb305028c09e05e109d6b4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBF2437022.