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 0xe0bdc3cce1fc5171c1cb7bf2907f4a86dc9ac138229fd5f6a8415d36bc66c4dc. 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/958be9f0-6178-459f-826f-4ff55ec90b2e.json and https://artists.proofprofile.net/proofs/artist/958be9f0-6178-459f-826f-4ff55ec90b2e.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 0xf4e1d624c6917f07df31fe18b14361b6579d85b9c1eb8857f71b699c991ccc25. 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/QZGWW1933547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f89074f75c32d16b07544960b3f9168031afddbf8c5cd88614ce071891d22c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGWW1933548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6a0ca471821edcef45c3372cf92165c7d2c549cbdbf1269767d5b26bbe7fd5. 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/QZGWW1933551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eccae9ca0e6598e37c83f650ff9cb66622ba8ad90a4670e919a065be4ff80f7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZGWW1933552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf2597eac2543cbf7980cde6cf5bacd84cf06de6ff00954a37cc2b60148bc8b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:20Z), 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/QZ22B2064962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767900acf2259cbaa2f0937aaaee2f99db9339a528957102f6d6ec44d6b96e4. 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/QZFZ32073562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c4f6ffcfa5ff6243cfd0554182e130bcb77164a0ae66b2568f31336f729605. 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/QZFZ62011216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b970a6b7fe931baba2587fc9e8ad9d843caab2d80cf47eb510d6f595383a009. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62011217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3797349ecca81afbf4491797268a4501581ba218792bc1c58e27c1c5a598e5a6. 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/QZHNB2293339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736fd4f6ad91904ea0ac04e15e2abbbe7e948cee7629e4cb881ebc179be29e44. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNB2293341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842b03d5c28b610f2bd32ef7f50ccc8722c11cf720059208eab376ba55259646. 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/QZHNB2293342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f2c084551c49e8814bffa5c64c83382b245813eafc691f803f7a0e1a5e643e. 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/QZHNB2293345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cbc5c07a5de80736971f32f78b0ba0822a9a982fde4888f7d3d441ff8a27dc. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHNB2293347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89cba1fa4474ff3282fdd3f1ceb1999c33d339f4b18f5130312e81945ada609. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZHN42293539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c8e25fd3db064ef6bd8d95b242bbe0d18507038f583ff28bfb715bac7ba90. 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/SE6SA2320792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08655a198f2d648a3eefee0b0d1fd24507694ffc553c2c0cb2e5a56ce136ba44. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE6TI2377326.