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 0xd9e844a9fc418dd9975b0c4bd02df3280c5c94b58f7461a2ed5c46a1c7e13f5b. 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/af0cd763-baf3-4c34-a578-d090e57b018f.json and https://artists.proofprofile.net/proofs/artist/af0cd763-baf3-4c34-a578-d090e57b018f.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 0x4cf5b87138ff7c1ab2f255d34320ccb2a7531bfb32018b30fcdde0f1f985ec1e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM6MZ1513327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec45909fef92f795a807eab0474f7584dc66630d10dfbcb38ea7bf7af307f5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:22:22Z), 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/QM6MZ1513328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1795cfaa300b2f74d6b2c72a432642df845a2499925e1df47c57b60f1b6aaafd. 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/QM6MZ1513329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a1b35fa88b11c1f358d1466850939260eda167f28f0287d81fee411df81b3. 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/QM6MZ1513330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc88086fd2d6c3def0fc73a6039830a11d323c640fc49f3ac60415d16d478c1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ1513331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac23706ecb832c78664659ebaad612f22ee63ffcdcbdaa0b5314a2c06ebb9c18. 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/QM6MZ1513335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d7738723edd69cbe99ae9f84300152fe01c2051f1b9a91022ee9fa77c4e939. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:43Z), 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/QM6MZ1513336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd444613b05205d666234b3172982c97a69dd4536bcc6e30c7996e91fb9ea66. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:08:19Z), 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/QM6MZ1513338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67cbeccaef810a940222c169d9dd5ce8e550ff92856a27ed5eaccab6069c756. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR6V82505285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eda2f88a1417f540c16ee9f2c6623a426ba915d387a1bd6241702aca22befde. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:34Z), 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/FR6V82505287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45c66ae7a23edc62ce870e334eb7e2811aae6dbd751012782d0b40bf5fab15c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:55Z), 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/FR6V82505289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735652a401acfd984894059da6cf1af3419719ecad84e5ba7f861505625d8b41. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR6V82505291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb21a61c7aa3b0576f957698b09ece874c5edebfe5acdb9051d5ab6e1f86c767. 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/FR6V82505293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f9be8c0f8c27f862623b4afa8ee6a0a0ba277fea9a87ca1afe75b0cafb7d10. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:15Z), 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/FR6V82501173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cbd575185c571fb1018d7df9e1dfcadd37cd639c72faef320f129b4eafc260. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:16:40Z), 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/FR6V82501174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe59d8ad0201d145e4210f8ac2ea729c1436d0aa7fed0120594908aea075e30. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR6V82501179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbab1bd5f7e1c6ed3cce1d1d071847297b7da259b7542713597a33d786ab7025. 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/FR6V82501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9f44592b9790ad6d98f140976bbb17396944b01a7b9cc33a27b94e86878e1d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UAMU11714788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf74b539b236e0fd0f38418f938124ed5208c22241507bcaf6fddaaff88c6b. 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/UAMU11714792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630a4ca1ba61a7f6fbdeb854caf5536246009724c1619d64b90f60b9300ea3c6. 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/UMA162368318.