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 0xf05382b4860184703665a865c12813c13ee15a12c9b076f2414975196362aa34. 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/a9c82391-581e-4516-a7d5-c574750cf151.json and https://artists.proofprofile.net/proofs/artist/a9c82391-581e-4516-a7d5-c574750cf151.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 0x9f3bbfc3c6363cc5901782ed49a10ca71e51e7eb22543d5384c2b2cbebe072cc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZNJZ2187052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f58b4aea299352471deb153903090391c95b7725bcbff26f1e44ab7710c883d. 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/QZNJZ2187058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c925548059888e7980cbca468e62fea251a99c9eddf8672a7f91b0957b741ca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJZ2187059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157edfd55476f8beecf01b9b379607cd0a6324534d24fdce41b2173d6589544. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZNJV2222495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d286f656fb3588894a0cff26af052702e31e329bb60d123a53ba35d5a594d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:58Z), 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/QZNJX2254309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4be03a1c840d7af96840e7a1e9c927180886a7135a66f32a6af159a6316ff9f. 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/QZTVM2259174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11fcb18a04b9e936b3ade311ab911d3739da4007a74b495d7f290c525b7127b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9N2246652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f1d223d17a97c675e5531316600abcfe2f2d406cf19998035477e22de08e9f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:04Z), 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/US7VG2377744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451ad7b129ea0bad6d590c7a656b2e988188db7a3eb97717860af19c09b5a8ba. 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/QZGLM2389558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483bc7a01d4e17c25c64c143a84456ab71e105d525744501eb9d4c3bd9d0929b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:13Z), 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/QZNJX2308941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadff69500e2a4bce731befad175884c57b35557d4aa0fc0ac5b95c5557a0004. 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/QZNJX2308922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b29d15a478d4b9ba99568b60b4b1db5aef3a425b22aba7426e8b272122410f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:26Z), 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/QZTVM2323653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8947fd345dc3b33050c6959b59f252eff4e2b1e62ee735d4494e76b3f01956. 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/QZTVM2323722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd209ec530b8524f2bc53e8489342b5f616045d767894e193be9fbab029bfc330. 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/QZW9L2356091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d5451d35a7f4e03ffe5f2e22a7ecff4e539982860c95a79b7e23c0b6ea48ae. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US7VG2431234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd667104dbf7b9e2ce54f5edffaad4d8b3bae5e9ead39b5e66db14bb3bda978ad. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/US7VG2431206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b25a08fb8271ee38637c47c1f98c3ec2a83166f1787ecceef14179e5205cf9. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:42Z), 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/QZNWS2493741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad2ae692ad7697ef8eb834321fc3ceddb8ce74db2907dcf69c242b89a68183. 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/QZTAT2421445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c270a3f746408e051cabeee194e7c9b51088ffe0ad4b1ea01986b42915c25. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZZ7S2436485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dcc020733e16d4176ca9ac06cb0dbafb524eb567067272bca4f088234ae9c4. 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/QZFZ42534395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccfef6a76852049fe90d5ee5f45edf6e073de242b938896aa100e09adbaa381. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA52529720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530ea77000aff1c2c493b7ecd950542dcfae2710b8b29883f26023d1d8b8044d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHNB2508865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc440dad91f49b23f9a186889991f7475bf997b3810c722e5a724f4d7749ce684. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWV32548277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf40763b4a4e10e667bad1ec0c2605513e792fbab18681ed318734f09db5fa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32548290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b450668cd46e1bc2448282af01ad57bd136275f074f0e20ec2e0b9aa750237d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32548300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880248066071623dd82feff73a9861363ce51a4a454f1b5b8b270d86fcdf52d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWV32548302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682fb38ac0b835a83af7ac0c381fc9d3726239f6f7ab20a50b45019a0c554f84. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWV32548313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c86ba1f147f4b13c8971ef4f44b288b4009e6150322ab456fc27af789add4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWV32548335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8687939ea26332fe628b13a4223cac7c52a35f886d8800cd167b51bfa39fb08. 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/ARIXB2204877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6018afc266fc85cbfd131897f624a0fa7456f4ceda9ce4a42ed144f865f45. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJX2464678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067e9e6ba45de394653de32fb426acd8df6dfbd809949176ff0e828c6cc5f33c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARIXB2106307.
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 0x86036251d82c5dd606035aeed435319a8427c086b7cfc5622ca5a83b8b252d5b. 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/QZMZ92236662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca3790abb8d71bfc80a4629e31488098827ca329686c8fa3dca2db7a832aa9. 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/US7VG2486219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99898ce33d49a90d30a516185e9e46352377adb90d81e921436dadbbbcd3196. 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/QZMZ92266557.