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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beed097330f56888aa7c771167ec0a991761d501cd7d49028695cf81923e272. 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/33568933-cf2a-4891-b4b0-24fe74ababbc.json and https://artists.proofprofile.net/proofs/artist/33568933-cf2a-4891-b4b0-24fe74ababbc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9523290e9935f902ea8b6ec14f95c1cf956e92e8e5d35cdbb4050ec7c18143. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZES71802765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0b45ed18d17b611e18e711bc1a4526c28dece7574c17c6e300b441254d9ec. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZES71802767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1f8bb85aeffd0322987bffb0402b9a6d55ca6080702ff94083cd5e3fc729b1. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZES71802768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140923629da3c391a68c6326759e0edcc93323a8d1f0391f3b9ce27d0cc597e8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZES71802769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4815d8f0a8945f3f674f28347341f994a7a1b5eb7f617e25a7828b10465a5361. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES71802771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae313a51074625f18dce5848db628672cca52466f18b5596042566f71840aca9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES71802773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fe212d80dc977098930a3396a7d6e0b67051d3e809d0710e39c93043d98f29. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA81924330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8eab3a4d1d3be7119fda8551186d6390388cf1547caff1aa5800a6354ae576. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA61958192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df2984927e0a66658412e6480a165d98373eb1f27bef3a5ad8530bfb3201a7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFYW1963558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af12cfb3fe6a8132c219bea6aabad63cf417cd5eb56a89f3f4a7109c1ca19e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZFYX2053527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cc038cca7259ff95836d1ad3828294e1e9706d167cfe613dc6d812d0967891. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN72061359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db84c2353b5d3bb2206065d2e6c30af3dd9175ddcabf553e99db0f339a519f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZK6F2092990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09700ab8bef7f92edb897ff367bcfb414bcff468f701b5e8ebecb60b510cf357. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZNWS2062731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6084559553e5c4b36fe8869667711f88337dc415b5bd58b66c7e2005de6bae43. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFZ42138645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d9bfcb8b9bea537985f1bf479dd6a7cda3dbb4fbee8ca769de8c4b6044ecf. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZDA72162803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d08e371307b309a5a6e9f0e30fa618fc69ff6f49ecbab967d11105e9a697ed2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZES92160886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc2674b4bc6ab831e1a6f570f2b09db1b0cf846bbfcf26698166a325dece7af. 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/QZHNB2198659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2ea9480f817d03738c8fe5b86af77e275be735b42f2cb65df58cf107c1b0b6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6J2155644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d72cfa843835f83ffba38a81548b1c9594c1bb5f055efd169d59067d60adde. 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/QZMEP2118291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd02c6d815fb4b121662eeb00904667d6b2d052c225a737e3eb22ba6067ff32. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZNWR2143170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d21dcd5a14288511322d5c06e3d93e1b1b0e02f149e5eb035fa3981650f1ee. 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/QZHN32239392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769fc6124f39dcec84f735beb1c40e6cad4841cc6f0d6246c8d37ac748a59fc. 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/QZHN72259531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd842c6e659439e5b202a7deee70f1a03d4664066e557b37f7a7926c003a5a5eb. 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/QZK6Q2294085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ac05b780440461a4c832107b62411ee2d72251692d49dd6fd5db9694b82354. 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/QZMEN2206647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a98fcf48d55d87c2b470e5db924a8f37445d3d8e153a4c70bc01d1821d2ba6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGAAX2300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5d7f8d3609f4ac39d4d101507c9bbce6f4dde40424b8ec383db89409151d7. 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/BGAAX2300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070eca2af6ae099d61e6966f8c0c35e12137e8aece2104e159a15570dbba124b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BGAAX2300470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180281e55f3b679d1301128ff2ee587e0b11ef7409f47cd3602438f1b847ab0d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BGAAX2300473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1fb42ebff8c7207a670eaa2ad7b84fc29d272c12ebc5fcb71cb3864523faf. 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/BGAAX2300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54a13a767b3e4efa02587fdb70e2e0770bb12f84968b46ae9780386e57cd644. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/BGAAX2300477.