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 0xaf52bf677498e8ff4ec9edc4974b38579c4573f581230e04dc90e83ce61b611a. 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/e7b56c03-37f3-4b69-b7c7-338b2e014290.json and https://artists.proofprofile.net/proofs/artist/e7b56c03-37f3-4b69-b7c7-338b2e014290.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 0xfb1539a754c97521c45908674ea9f16570f3d840e4e8f605c2c01df6662c790f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN31997125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7d6004cc6b2e0b0bf9d144b5ee6b817c9abd7317a8719c9ab327e5d90cb83. 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/QZCE61841659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17486ece524e50dd4eb9832907698f1bbddea47782e9dede3fae43a0a09d772b. 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/QZHN91915865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb40b9072f5a7f1435ac40ff914dc89b7fb25fa8309c02bf5e6d1105609041. 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/QZHN91915867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0429655993123590216b9b2f68b3e511a60a6fbb171a7d6d9ebf9901fa29dda. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN91915868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe05ea3af6a3c3ce5c08f2326abd3a4fee9dd6ad8eb415360b27ed135a74e5f6. 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/QZHN91915870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e2a9375558788654915b2d2165d3d68d0ed345b988c4c2babffb28a06d4d7b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:35Z), 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/QZHN91915871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec62fad38c384e3fc87271357dda11710ef748197c786c3808480464e2587ae. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZHN32094031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bdff18325459f56ef648e0fef06f235ec6da11310f8d103ffdfd91a97a6554. 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/FR59R2132906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368fddf4e3e21d7cc895e0f1d591592cbd8b23bb307c7b817b86d4576d36e1c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR59R2132907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5c98549e4207e808eaee808fe155bef39cb8cd434fc2924c6e56292ca044a7. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHNB2268365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5584a36bfb6b0c8bffc0ca6edb2c347136b3849d9cd1fd4d84adfee42b8957. 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/QZWFG2368202.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb3313230e048d09753ad64e3b7611b2264540959d4b93577a9fc0776e7e2b. 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/QZZ7S2406899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62870814fcdb7c5d7ff049046703cd502e038fca90bafbefc2c8f186d809c731. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7S2406900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1754adfa3acdf5535529e63f52265fedeea32681d6539b40ae59502b06932e94. 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/QZZ7S2406902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3fa0823001b3f77ac8421749f0e46293d8ca3816ce3e47ea46ae581993148c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7S2406903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea8018ef2dedcddcee10c7f58f13ae7f9fe0b7b50ceffb21426f6e0a08d1a54. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZZ7S2406906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e1b88f6e4339e768a58f0bfcbc8b0def9916d95c70e91c212148e5ca62b663. 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/QZZ7S2406909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e9abb79e5f80c63b7d9e785e1469142f77a4ac6b56f2c3d84a25564b7f1d99. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:03Z), 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/QZZ7S2406910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c19d6b339d6f0853a724b2c6aa92b9d42216dad3b2482d77a1381382ddf554. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7S2406913.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c91dd7ded99280010aa4c8c8435b6a781e6cefa6f6c8db340e8a16c02c1134. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UK6821903509.