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 0xe3d78e653d6f27d06c8a80f8b976d2f08211f1a3abd4fa0e12766416c67f1985. 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/36289463-3b9a-4802-9265-e8b3e1c88e9d.json and https://artists.proofprofile.net/proofs/artist/36289463-3b9a-4802-9265-e8b3e1c88e9d.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 0x3f0f649bd2b1a17c4a0647f1410c60705b41e1801707617affc315f0cad1a4f5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TWP011623802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2858106fbde84f5b517f9cf5268672b7be62b4ebd8f63db37c6d330f838908c. 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/TWP011623803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f642b61abf977592414a29b2067bc80c8d7b189369035d3ddf91def1113500. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:16Z), 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/TWP011623804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ea50e73be5790f73993d248cc1e142db5cb491e8abfc33cf7efab3372a01aa. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TWP011623807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa439432a1ecb4c57e97aca93f39f03b12796a55e49c83eb892c1f2c55f1901ad. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TWP011623809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6800c016c1d8176e1589565aacf3671f75dbd2cc7ff89f71357c8a139189df0a. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TWP011623810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f887cad72337d5d1b70bc51bd530a2f8c80a63bcbff77197908b11c9320e50c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:42:36Z), 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/TWP011723801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff46cb312d1481a7355b21b357ed10c082594923ba8a0458f19f95e0ef58ad. 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/TWP011723803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04c0eb0e1f47c0e1c7e7f06d69e92350234764696b83d8eea425e752fdfeb95. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TWP011723810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441a3196d1664086fed0560a290c08e46794083e5de207237445857d914b4b74. 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/TWP011723811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c427b0b2fdd111a110ba6ef33833e20a02c7d07cc1e352f0d67df20be0c697. 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/TWP011723815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8778b915ccaea261ca557c11e9628c5e270b547ef9ca3e29451def811ba167e0. 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/TWP011723825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77ebee01c995f06ceba2f59c8766a60e0de1b86fddc0b5c388a35b65422c0d6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TWP011723826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ae562d555b6d5c337a3fb390bc3ca6601b13456d2ab95f0bdbe582bcf3e5c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TWP011723828.