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 0xde6c9cc235f4691546701e81e2beb161dd8dd6505c0ef4c4593ad086a3c362ef. 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/f2476e00-c0e0-4afe-a929-a8b01b859f32.json and https://artists.proofprofile.net/proofs/artist/f2476e00-c0e0-4afe-a929-a8b01b859f32.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 0x0fa562dd3ff0ba3abec3fd1d1ea981d9be9c962b411123f064c489c70b2bde3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92289376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea01905597ed7968bfe27181540188f58e3a540f7d373cfc772fdd4e88fd2c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:49:49Z), 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/QMBZ92289377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932312466ea4ec47a7bb84f9782d1fc49a65a528d4267413c16d11f6e9af8f4. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM6N22290822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac15fe09e33337f738088c34e9790ee612edfaaebfd5543d8ac7135f3ff64c48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92289379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa047ada646200d19161afbfe58f2020d2688bfa3ae1b1d420e1ea6a21d054ae5. 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/QMBZ92289380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c9004ece01a13e3086f2bdc3a78f61c029e9634c877c37f6a908698097aac7. 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/QMBZ92289384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c52f2524d16544e257fdb4f328230d1d244eef687b47678853b5ce9887fe82. 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/UST8K1647918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33877ebca29e0680c2c97011a9ea42af2db949abb1cfb4e972bc506608aa226. 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/UST8K1647919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad599126856003f272e5b4832cabb6a6e4285daa6bc29ddd35cc1cf2c7195d2. 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/UST8K1647921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75de8ca424d33379dfc24a78aee2a49dcaaa1670520540cdfc6264f7cb62d97d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UST8K1647927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1ef821c951fd8202d1feb47a905cad1f1eca3164d6294fd7023397f14a1b55. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCABW1482953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe46f7b867b7462bcc7e827fb471e5a1e7f59ec37e88ccc326f2d9d18c71539d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCABT1462301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186183dee2b81b3fb7cd6d83706d0cab91c3579d163f6e75bbc7a5932b36408b. 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/QM7282433592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d354ed1a0407210c479374f4be07bf7b2d950d8021b636277f4fff5508e4a1e. 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/QM6P42442114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c80e9117020c21288cc6c9768cbfa39cbb75c94af772e4618cf529037bf4ea. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM4TX2430781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b18bbb78bbb0bdf7a2ca32bb8da7dabdf510766b89e9b12b085ac1a7a18a35. 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/QMFMG2355397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932312466ea4ec47a7bb84f9782d1fc49a65a528d4267413c16d11f6e9af8f4. 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/QM6N22290822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9b7ebe4c0998fb888bbd7eab0c63ddf90f3027a72d83812aaf82fef75f077e. 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/QMFME2181755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf8fa75013f22485fbbaa55c17797f0865dc2e746b522cf5fe0213466be2abe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2021984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29b0f66132bf533c4ac72abefb3ec58eb9fffbf133bae862017f38e1b1134fd. 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/QM4TW2105270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf8fa75013f22485fbbaa55c17797f0865dc2e746b522cf5fe0213466be2abe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFMF2021984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48876b647704a8dac1900b0ee5031f2819d14db8bb7457346896dabf1ab2b56. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/NLR8C2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37252abb25506dc1b3343b20cb1890c413989221c12870ac22ebabfbd1bb66ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLR8C1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223ed97552bc37bb987154ce1fe53bc164a50c4547063307819ae1808c48f8e. 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/NLR8C1800030.