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 0x3bc228da026a0f497ba3aaabf59c486b169982cd24b264ecaf203a11e63be91e. 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/4c3fa0be-7fda-4df4-8ba4-030f949f9264.json and https://artists.proofprofile.net/proofs/artist/4c3fa0be-7fda-4df4-8ba4-030f949f9264.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 0xfb802d8fa5e865aea21811efadf3d5c4a0325c81bf4a430bbdcc90497466923f. 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/QMFME2322314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c442d87ce83b2d7a8ed0aa6a8da7bcd95557f7b6249430bc9e8de4cfe9c1b. 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/QM4TX2326463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e9a4cb9c2b6cfa014c0c1c2fd5e312f6373193c171b9362baab2321d8a7a97. 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/QM4TW2332702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ee0aebe938a937e97174c9aed4220d32bb2a510c3f18e760b7e844f29c8ce7. 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/QM4TW2332703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d7881c1edbc8f70f21d487db9b4c4028d7bcc24cf5ac9b5dc87930c4103fd2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:57:38Z), 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/QMDA72227189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a512d92b6614b478e7b0282fa68f272f81d924753041a21d0c2d199580c7bf. 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/QMDA62262573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98f6a85e6b7af138b8caf983433cdb8cc714bbefdc6bd4b2c0d9f67b0041a70. 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/QMDA72227194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae5b3c7e64af6a4fd7306436d6bcb94cc0fde02a1b9e7593c0ad87415b29390. 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/QMDA72226923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa47bda83041398af55b7ab9956ee1e4f130a1181b821a20cbc8b764b32d4a48. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62252192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56acc89e74db824369e533542546b29292e263a43211c93803d75c6bc86b5de8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92280763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa47bda83041398af55b7ab9956ee1e4f130a1181b821a20cbc8b764b32d4a48. 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/QMDA62252192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a512d92b6614b478e7b0282fa68f272f81d924753041a21d0c2d199580c7bf. 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/QMDA62262573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56acc89e74db824369e533542546b29292e263a43211c93803d75c6bc86b5de8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92280763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6481070c16adc41ddb4261cff4151b9fdf6b175093b08b7e6f4455cbd11b4b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMZ92242723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde13b6d33627a2f3aeae960c08c024d402bd3b57a8cdbce7307ca3da51549b77. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2448204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a54c38736d453d095f6034f91767fa61324c3d4dd694a0775548a13652453a. 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/QM4TW2485224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6494eef00cadfa0910bf5e18eabcf61cd6e74c90d2760819ee61ad49dfdf28eb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMBZ92472603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76e7509ad7115223a4b4a520744ef4fc3c8146e77b0cfcb0ee54a942435c52. 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/QM7282434248.