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 0x1f138f39d559f8d5ef04ea44d4d0abd7c5fdbfd951318b36f37b5e6a12e698af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d0a533-d705-406b-a551-3381139ccf14.json and https://artists.proofprofile.net/proofs/artist/c4d0a533-d705-406b-a551-3381139ccf14.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 0xa455b6bcb24ff155508df437b3aadb01e605e19ca29cbb9c44da51239fe17131. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:39Z), 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/US7VG1476310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467f1ce511ad55b8fac9721c6bb6568d1ce2e4e765cc4d4b9b5cc33ff16e9b01. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:03Z), 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/US7VG1547218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0be9e55acb2f2d1a09231051a0da97ae56370a3da030fec1743c9833376991. 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/US7VG1650258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15b90cb1ceb0400b3eef0f5174a49fe8fddda4bf9947e1c4603dd042ac143eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5AB1611635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacc8a6ae8f2bcff32149e13fba6fd950a4fea5ce618090a658ee7d78454dd63. 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/BXG6R1700435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4bc119d6feabc7e1fb7712ccf5b246278f3626ede9415b9831e5786a81e8e4. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/BXG6R1900829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d508871f5c0d3c3da438a8b338bc6d1fba9befc2abbeab14a2c65aab777adef. 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/BXG6R1901364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e27dca385a29378f8ee1e8f1a9f849886d7921e8332e92d1eb19def604d757. 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/BX0SO2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cc119e26a4481a6cd353a395eb539cea398e282dbfcbd5186e24234e052add. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BXG6R2200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccbb0842053e06cc243b44b2cbd1e888f0e3d9dac933f26f4495bec893c9111. 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/BXG6R2300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d94b87bfcacd8be8a8190787bc3de3d75bff7ea3b9336675b304231098840. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXG6R2300513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435f48447481deeb1441e7e61b5f4f7477f529d80170066bcb8115035c3afb42. 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/BXG6R2500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb866a61fb32fdc325bd39a0510d37b4cb012df7c1c86182f60e6dde8a411e. 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/BCSOR2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d28af6ec787000eaf4adfd7b6286bbf7672026036cff4902fdeeafc49f651c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX7P32200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae3e2abd93be952726c6e395e5ea2cd1b178cf929596e0e8cf55ea1d89b75e. 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/BXKG22302014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeea5a36a3ae18c34eb552b72e9c20c958e6b745743e715e1a583d9f1b8f2cd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXG6R2000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c89438bf5472b5cc8c20cff880946af71cd0e571850720b81eed76a55fe875. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1547137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18983a7639928b8f50bb7f4219ae18df5520eeecdde26198b7b099c39f7d2fca. 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/BCSOR2500020.