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 0xea417562ccd90e1e209b621f2e7262cd62442c4d5b2ffe50b4fdccb1bb22a050. 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/0b9848ec-e330-4741-8502-85179972662a.json and https://artists.proofprofile.net/proofs/artist/0b9848ec-e330-4741-8502-85179972662a.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 0x49cd3e3579bf6a0198768e6a661807f5961d189c0573f46b0dc56d0791a80420. 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/QZES62297509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f53ad927831a274cbef58c1f7231622b5d78ce5e5719fc6940ce1ff4972fc8. 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/QZHN82222264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed9fe3790ddceffe47a9958c8aa31d09a21e0a947e19b948d9df50ddc102723. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB42237163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0941ab94c6dfd1f9633b114ff91bde97a2d168f5a09b1cb56e8e9daa4b02e064. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZES72305393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9503fa8d69b0edab50bdc6e4773684f4d985527d47761a27318544802b9bf18e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZHNC2389150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1095a96c4c3db0175d366f452fd5cd9dee4993f09effb6e7d502b2a620f7ff9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZK6K2345431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a28574b82b893c8669c2133cb36c860e0ccd012024d5a23161fe269683552ea. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZNWW2394222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979039323b8553e4eecf869406bec056668748e5d8664557d418de3dd753c096. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWW2394223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fbc8ce23656e1651197c876ec039fe03849dfbda52fd8edc5003748b343e38. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAS2368714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0d9c8351cf44f62b803e35a4d098eb1696346e6cd7822ddace71787dc73f75. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFK2328672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea655b724651b3dfd5de3c74dfee10d33644902674b3e0d388f042c684c76e70. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZDA72402899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc8cbb54b41fe03fa2055d65cac2838b84e080ecb67345e0c06f071a6faeff. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHN42459758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a48d3b1edb8b8e812d446968ecd03e6f39b9426fb3d5c7e40bdab9bc6aac59. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZTB82425588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1981a5202136779fd37b12012dc752a876a3636fdf5e2eefe970bd870841fd83. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWFL2408295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40484ecd2ed6bcbe8f3caa58ca0557c740dcf0a7fbb33bb7a5ed64c47c718fb4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFP2425321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5782553a2fa5d8a0a1e75e6686b814ef1306f961fa9fc59fd9035fc39a352. 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/QZZ7R2460111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61470de8a930055924be1a31000c296b946da7e540277407f25142e0dc29bfe0. 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/QT3F22440760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340d4591140954946a6cc4f215326d7e8e453d8621ba409d2695073da522141b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZFYX2559208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8c306a113c075c8afaa0534dbfac0a4e52b8d627c2d48714ea2cc29364ddb0. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZES72597484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bf454d6139de1eb5a28fed4bb064a64f418ee48133d1ced90bc59f1953216d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BKTRR2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdceb7defa8d1c25aac55c2df1114bbe87e7b508b6ae6be05e4e64b06d255d5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ792552024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5e3c4bd5e2ddc7ad8dc60df82c6b848f042d47b68d150c538642f5f85b5e32. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BKTRR2500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3dc2432767935ee15f3be42fe808438a2452bd89b4d5d0a4d698f13b754df8. 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/QZHNB2423436.