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 0x95b39762905f47bf863e128a51c5963f67c40d3df167ef9c9b607c2fd036a608. 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/0855c83b-e82e-4fae-8430-000c19a2535d.json and https://artists.proofprofile.net/proofs/artist/0855c83b-e82e-4fae-8430-000c19a2535d.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 0x6e65a1ac5df2c76e4cbf09e1b1c4ea3a6a6502bedfb2006b392887599862097d. 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/US27Q2454301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089e78d8add0049c0a2c90aff3894cc7f35a7636583bc18dcbfd993df9f1db09. 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/US27Q2454304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03add119886e0c707fdd7faf91ab1b08f92e70f528502a8ebab0300716cdb8f6. 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/US27Q2454306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4862e41bbf598936930f2b21457f4d9e6326665379573ba8c9b27940fc93795. 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/US27Q2454307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf958016d9126d14f817f9a5adb3426042339dd7452ffa594544ce984b18dc35. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US27Q2454309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c9a2fc2105348c5c236f04e3e6fc06dea0507eee71c4112564eb3ae279689. 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/US27Q2454310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3e89cb00e57767552f5fc5b88f17033b7083e18b01b2e8930e3ffb9e0ada66. 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/US27Q2454311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2eecec7fe630d97ca60a356f9eea5e2e43f4b67626283a62a14535e46b107a. 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/US27Q2454312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34bc907e56e6e193288a795e48dc3a954e64d4cb9c12968d8e45f7e7c267e9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US27Q2454313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cfbc33841a44df8be6f765f532e9732a7f6521291e264d597ecc3dda4fea9d. 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/US27Q2454314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491683ddd91f6a59506d5f5ed797e9508629addcd506ac8c622cb4213ee18a16. 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/US27Q2454315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c975b5cefc64cb321dc2f2ff48fd5679a52a63c1f11a7a25902c0d3895f007f. 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/US27Q2454316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0604cd0fe6bfa2a6ce368f733f639059fcfcf22c09837e056f5278daada481c4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US27Q2454317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d1d9cea71304532b074c3dd7672e4fba75b2c9e7203024fe1c30ee22ec4b2. 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/US27Q2454318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da1d03992cea7a10c05f381c7d47a1e5934a3832c15f13b6f2eddc3e421877. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US27Q2454319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2ad3378b33459b4b5e38d1929acea62a3db6993fb46eae1caa474d04fdaeda. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US27Q2454320.