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 0x371a57b2f29a7da21dcda41ccc01a0d811235005f8f631c265c31838fd66df1b. 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/cdf2eee7-464f-412f-9de8-ee76bac8b44b.json and https://artists.proofprofile.net/proofs/artist/cdf2eee7-464f-412f-9de8-ee76bac8b44b.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 0xd4615e6287e4b64270c8a910f20ba5a45d6d3c55fa1b4e19d09b826b1abf22ec. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZK6M2237345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f1834f98ba51d191bf2f3b8a8cb03184c8cd8a3aac3cbd73bd26079446789d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZK6M2237346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde650fa6579daa259ad40462207660f7c7602a803644c506c7fadd37b413a021. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6M2237350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc42dc633c68185e58d6c7b05c9101d5a37169de6800576d4d7428e57dfb21a. 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/QZNWS2231050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78afe208471cd83bab830b801cdbdd1468b587a776285c28e7624de3ebcf8b0. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN92334903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd41683d740b8c98d74029c4851e22b8b7afd6d46c8da32906364c40e04ae73d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:22Z), 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/QZHN92334904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aad4ffaf86793856f359d19c131e7e53c0bcd2f31f570896e66d4ab4e4542f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:01:23Z), 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/QZHN92334905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e1e5b6bc771edbbef54c543a3989db7d794a2f8d73488ad73aa22ed182925a. 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/QZHN92334906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf115e328e4a158806d1c6837f173a60b3893e0090a1244f43216174816ca75. 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/QZHN72349726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905635d97b01f1c6361f3e740315020f0b141aa3ed7e72fdd06fade72e2b0af0. 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/QZHN92334909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102107af4e8579cbd088ed452245c05116ba553752830ec251fd6a6a3d8f6034. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:43Z), 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/QZHN92334911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c5567ad61a0d2cd90256fd714993ecadd18c3b4faf71d4119fefdb3f06af3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZTB32487317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe3f666f28cc809f83fdc17a21dd6a3c9230fef86dca877f13eb63c520c9650. 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/LTN702500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673cbe990c5fe15e8205a40d964aaae40f79a37994c986e7b4db89b161546ec. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UK6822404464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f2039d5df72bf6ffa8ede8aeac2205b0ffdcbbdcf6d5a20d11588f3f761875. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UK6822404465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe3f666f28cc809f83fdc17a21dd6a3c9230fef86dca877f13eb63c520c9650. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/LTN702500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34c3957d5015add1f767c4083fa253e8c4cb15dc23feec8afed2f36f0aaad99. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/UK6822404467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f75b0f53dd18d3701c9f384fd54b812bda64e9cfecbe64c3c6567c18e1e39a7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UK6822404468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4383b18f1358aa3d9eed8145c6546c6dd45c41f57b1359bb9514ae7e9526261. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:26Z), 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/UK6822404469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc7ab85a370a8d6a26d43bb7fdf8e6cb08b71d0a92b2788079463def7c3d961. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/LTN702500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3100f32afde15bdd1c0bae264817287119acf53f5b03f3738fd79ab550caadb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UK6822404470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03cc7afa56d36e282b85c760b919590b5d66b28478bc7f68928dde7b3cfc324. 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/UK6822404471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d8637eec49cc6c5ad7a5bc00ab854088a8c05ce122341c04270b0fa23de3e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UK6822404472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06125fdbe1b2a673b109ae7879e5f07f4bc583153eb69453d342e205b7aa2020. 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/UK6822404473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc312f36483b9eaa9ffaba872279731f6d37f39ed602c07ffd37ba3500075801c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:37:43Z), 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/UK6822404474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f2039d5df72bf6ffa8ede8aeac2205b0ffdcbbdcf6d5a20d11588f3f761875. 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/UK6822404465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7248d725287f90e4f0948f98ded6815f8fb4574f5a19fbdb36a6ece4dbd6cb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LTM712300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1e337679400b12253ed0ec5a9ab5c67189b6dc410bce2f7a9f7f684c6222a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N22440809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b4886accb68da83570de968ddbcfcf89ab4d78b84b49b88d593bf44be961f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/LTO112500001.