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 0xc39a7e844bd9e163a2e32e32e5ddb010684aa90b2e2f352077bbc692d9d5f355. 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/007fff69-5b9e-45fc-9f5f-ab1d000c4414.json and https://artists.proofprofile.net/proofs/artist/007fff69-5b9e-45fc-9f5f-ab1d000c4414.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 0x9b500a7062d01ef99e49bb79e0da90d93735431f8318f066b863f61f9e58ece0. 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/USZUP1012722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb86bdfb4c4f8dd827a51a494b88e7ce412690e648a57d914eb3f79683e70be6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:18Z), 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/USZUP1012726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83394b4047269e02c942ee348599418b583e9a562d4f00a1c28bda5bd7b37d. 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/USZUP1012730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00317395112c3ff2c0f5bb7f9462a883f832a28d3ed9715791063753e08a53b8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:21Z), 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/USZUP1012877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c5242a4150fcb34e633fe898a7be57d81e725010de23518473b9da806d791. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USZUP1012967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b2d7fa81f327f3b313bbcf68cf044d5e7a3ade2762e0a393cd6a9e0b7e8a20. 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/USZUP1012886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40c8531b3e62a403735c98f7f7bd2586e6071d5ffebb3a877121b14927acf34. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USZUP1012895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbd73ffd75f6e1603c8b336efccd14f0c975b5a65a0c4ee20999c8c1bb5d0c5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USZUP1013001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2707d74cc7d5d2e5000b18adec2b4fc496d8eda03791b3ba9e05899b283d35. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM6MZ1503938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c7a9bc5d5469ba99e73d2dcb4216ab4dbbebeb52634d255b6db97f8395a71. 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/QM4TX1753863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe069341f7dbf0f0adac7e4d09e47a0de1a3d6cfbc05375a2176c3b7605b5ade3. 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/QM4TX1753867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33804ada5043d81f09bd8cab66e022b3f14f1451f344204939d17f586576e067. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:45Z), 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/QM4TX1753872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd305c0e37beb5ac6dc90816a7a07d282c7cde691525931a1323e5b7954cfe. 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/QM4TX1753873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbdf87a684b96a749198a4f26b6eb0460d61e72b1ae4b31ff05cd9209cc27fb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:53Z), 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/USJTQ0903479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2d6e1cddf3d40b691aa914c3c6909da8e34db47f9df46ea00690dc38f3c2fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USV291441448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384f3de87a0f8bda2d12d2923a14478a17318ad2ec56e6b427c1dfc1da297b2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:00Z), 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/USV291441450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07140c0ef6fdbe822367bc9f62c2a2b58448cf5eafb573ac32ac23ef78f50ed7. 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/USZUP1202073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64a076ae14651bc60c01b26175f8c9f4e5faf3d0d324957a808fa95468df319. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USJ3V1329830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c2981e701445b674c651f5393f9875f2394e768ba29d14b68575a8259cb17b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:47Z), 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/USJ3V1329834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e696753347963b54c43f7cb3028cf58772c9df32865880c2c323a8a5a2f115e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USJ3V1329837.