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 0x225df625918688a551c7af34f1d3ed10361578c4e5259c5cfed5000636a0e1ef. 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/349f536d-9871-4fa3-9730-1b38ba02c445.json and https://artists.proofprofile.net/proofs/artist/349f536d-9871-4fa3-9730-1b38ba02c445.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 0x0f055d733151b565ed3f0518cfc6a17a274cbc18e5a68305bb1edf9d01abf3d8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFP52057186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7740e2de1cfbb6c099f901a92f147257b01010e05d1c352ef1ab5e9963c0af61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6L2082090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6266003e2f90706fbb3ae9d1341f51ff1e490a033a4afc03acde76ddfb88d683. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNWY2138620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc84c9790df76b69ab43ec59380aa6323cf9f13a319671f0127ce93d7eb9be03. 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/QZHN72270856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922dad309e7841899932b10fe7e243eccb4d2bda41654335c4560fe995624b86. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN72270858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0faaf3eba96e957c317ab77457925395d2ab05933a1316edde923b81ae4e093. 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/QZHN72270860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc677e5373c24fbdcba1a3162710042df8b77fce70f99f1e4f4ad9c6f9090eb7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZGLS2320224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8fb75a8c48136637ead631c346f48f75d229c0d531a4ebbce5c3659f44ba21. 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/QZTRX2395258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe54833282d7ebd2dc00fc5ae056c947bbf1fd81702de2685f8069be15cc836. 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/GBWUL2311905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4708ee56fc759c748f2ff6a1922d80f3e5aebbb407f94dbd5a0da7d6240dc7f6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:32Z), 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/QZWFP2569515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ee759a74919f69ce262a89f0544a6030dfbe280f49a5aeb65358958335ce8c. 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/QZTBB2383131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da3cb6fe92d040208072f57dbfd3fc6f2634e6db322a71253be898f8900759b. 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/NLL8M2101586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763cbc68d5ae34ea33d82fe612df832e974d56846a3ef29d2b305baab25dc24c. 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/QMRTJ2300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15afc5af1f6f3af11a440a1c02e2d5386df30980ce57cba3d01358c00f867fa0. 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/QMRTJ2300124.