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 0x43ce7ee468835c556afcd8600091335b99c3789aee51f8175728957e003d38c4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/216a9e00-5fd6-427d-9bbd-e769c557c1db.json and https://artists.proofprofile.net/proofs/artist/216a9e00-5fd6-427d-9bbd-e769c557c1db.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 0xe9a494830fa2be33ef84087eabbdd1181c14db2137311c4e832abca880fcd0ba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2351007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdf08d9d754ddd594ab3244c751004577d6413d4a0b01ef97d78ee25df0a7c9. 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/QZWDD2376555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8c2b14f6bdf85fc2806c7c9f8365d7302d86b224165a6dc55c1e3d29b1ea4c. 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/QZWDD2376566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f28e6443f321e2064fd6d61239bbeacc3938d1efb4e44231bec69141a5377dd. 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/QZWFJ2321043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eaf548e63b278d018f8c607a119b87ab7723db64fef15c9c589f5760dcb987. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:47Z), 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/QZWFJ2321045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81246bdb2fecf4d017ddfd415219b66089f4640022bef65f3421959118454933. 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/QZMHL2442667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb292ea913d0d323db087896777c48b95fe87f933b7c044c45416a28d229b12e3. 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/QZWV32416730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329e5648435f74439d666223915d7e508405efa8b75a405441404b56ab6d4d34. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7L2438064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5a8ecddd9486f1bb703ec1a439a36423b8d0bb1d9539b6c1b4e58efe13233a. 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/QZZ7L2438065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad56894001d9a3999b38731edc3df2338fcd39b27b5128456e86cfaac3a658d2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ7L2438066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5123a9be29c9d4fae899f2ef87137043578d4b71e209d742899154b1aa21abae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7L2438067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba73e5289ba78c78d30919cf895ee258ceae40ab1036097087fee564b207474. 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/QZZ7L2438068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b6fb2d18884561ac4d98c29baf61c71c2c770218989b4d0934a3ae0563435d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZZ7L2438070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55b36c3f827f2d35c8d276e709166d87c49aecce2c15230241c0654989f3a8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:39Z), 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/QZZ7L2438073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea1e327efa724200bec3a819cd3b11f3843e43a00f1b84d9791b21236137498. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USZXT2556306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b532316dc9ece7c987e9d788bf3ef04ddb975943daf6bc88124988090e57ac. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:12:15Z), 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/QZMEM2505513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ec47279640ef76a74ae8e602e5756d984ea358b854dfb0ad622b64c41539ae. 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/QZS672576057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984a614f019b10ac8ecafd86b3c66f457c240300ed21cd35bfbfda4118b08a4b. 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/QZTRX2474421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad74baa61a54bc7ef116c0787d4369b51231f59c3b0fc6c449964f390b25804. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CA5KR2325860.
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 0x2df25e1508d365bd747d63e74d3192d9aa4663edb0325e5833cf469a7da2625b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2352802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26bec98876ca15b9d5920c8c8a205be847ce8b6035d5622420a2ae4d59536e4. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5FN2499220.