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 0xe2554575b286772e136e1426f43cab90a3045a2df06c0ef79846f71854f5c88f. 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/f446c567-1019-4233-912d-756756174a10.json and https://artists.proofprofile.net/proofs/artist/f446c567-1019-4233-912d-756756174a10.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 0x6f10c8098acdd964be065f038defe777c493b381a26ba47adb63a92929408bd4. 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/USDY41851938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e671d6dd73ada468d419f6dbbb8e894068953bad41ee5c6124983606bb6bb7. 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/USDY41851939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07219b1256cfca13470870ffc8483ce58fc3503c7f5147f0a7dfab3ded196179. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY41851941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21903651f15b594ea17a4786761af29d95c867f3813b46a678491230c502a046. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USDY41851943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb874d165a126b97d0ea47d3a4d3c6b8b7ccc8d6dbd86f4c3602f76aebbee3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USDY41851944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce09fd976acf49cccb656f580676cc87549c5388efaefac50112ca57be3ff2. 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/USDY41851945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f9a48bf9dd57b726afa42d97348906d35d3f89aa4f3d36df32e9314f84bc61. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:43:43Z), 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/USDY41851946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4291b1b45d120278cb4210de4367e32084038191fbd7effb860dcfa1e65c067. 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/USHM21858889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94a096663b8425193f7d67da416d5dc86640a20f43758a221bb8fb0319d6314. 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/USHM21858895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900c2534bee4ec99d85ab8fa0e6170d313bd02d9890657a1bc5a4aee9fc8c434. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM21858896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0977a12ce70c71d86697c2e3a791c4527f0e9c58eac0b865c0353a9b9d0dbaca. 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/USHM92017677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c7fa972ad2620b6e46a99d0ea8dc0ac55a5c786e27096b8fb57a17f5c2dbd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:10:39Z), 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/USHM92017678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bcf54636fc4263c90b632ad85e2e1c7157feadde777bdebe2a2f07622888f3. 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/USHM92017679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf038469d1090760dfc40ace2de5dfd1ec351a5b750de8db92e1100e6c3977ae. 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/USHM92017681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e6328996a11b4d94d73f079585ff49bc96e2bbfafd4df371fa972288d33a13. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USHM92017682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fa69474d23e7fca0008e188857bf3e36a6edb932026473576cadaaa6731bbe. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:47Z), 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/USHM92017684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf3ba588a9ee1d4bbea5d14b2a162ef471eb844f87a54e23b6fcfedda2f5d3c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q2164173.