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 0xa52fa9927b1850ec1d52af3a84b01fa2aed4ca910a0a92490d1e006cd6cf42c6. 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/0e51559c-b606-439f-b949-7ec9d4ddf04d.json and https://artists.proofprofile.net/proofs/artist/0e51559c-b606-439f-b949-7ec9d4ddf04d.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 0xdf6b1b7ec8029da4b814f88f5da28004378b92c5aa25e8887db1dfc579c364df. 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/GRPK11600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc928198dd3e72952c9a53ff02b8e6ea4ce3f049e67aebe0826e9356b7124676f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GRPK11600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b31e29f23965c05cf59068a897bcc01937323a0f7660b5ceef557a701052c2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:25:30Z), 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/GRPK11600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b5dd3d2dd3473569e2f7b35e961ee94ac355adadb900f7d3db8d39b0898210. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GRPK11600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2c9a448044c1218ad49a8559e9215714f47127309325a4525b7e060701f637. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:17Z), 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/QM6MZ2354961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa72d46345ec2854c3b9e61b0037f75c8897910fbe5017cff7f6f025f889975. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6P42344007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55163d05d831fc0e6cb50ced5f4742e2fb86302ee7506217515eb78aeb9ad8cd. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:52:40Z), 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/QM7282368827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf19bfe6edd868c0174636a967f09fcb754c9ca664adc49a8d8745439ebf598c. 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/QM4TX2368615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3bbe030690dd4a20b9d6d1098e0a21fdd3f3929e7e22da038f63f4d5938920. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QM7282368868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a3d1bfc718404ae2ee7e6b045b765ab094fc09b60b9a8cce56ca8127715395. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:31:31Z), 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/QM7282368865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2de1fe79a46e756a25114fdf039ffa8521f07e9b37991a090e9f4358feaa5b. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QM6P42430089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41cac27f0894c9ac536c31c2a99d20ba118710090d361f13ffd583f61fa42a0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM4TX2566489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef3738deec815add0e40545a3485669ab8952957075b31728f426e109c6d57. 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/QMDA72437256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aff3a2294c40c9d2d0d89d0b3b4d08aefd107006bb2deb4dd19d51266af5068. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:49Z), 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/QM6P42517654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ea170aa1e31ee4dc17e883035d85a15c8e5b45ce68d885c57dfbf95d770651. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:25Z), 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/QM6P42547367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5a05305a5ec7023a8aa5508b91f31bedbf485349e418f3fa42b58ee355e10. 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/QM6P42547373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d274a2f67eda37c572c6bcade21a4cb5ef4974dedf76947d131ae4647aee80. 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/QM6P42547374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e8b51c51ae13d2cbfad94dc4793f2cba08cd77a444b0b11638479d23678bf2. 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/QMDA62530068.