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 0xa2882c183ec0b1827e6efe5dba6d6ecad5d07186802be1cd4d95ed3744c3fbba. 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/c7835d4d-ce61-49d7-9fc6-33bbe87fd3cc.json and https://artists.proofprofile.net/proofs/artist/c7835d4d-ce61-49d7-9fc6-33bbe87fd3cc.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 0x913ee4283dc91a497d6b37e4c07446212a06a8072a1d1a7ebbcf580d053cf540. 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/SEAMA6468070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9463a088f35b7f7cfaa695f6e9d7e401027c845ae844351b851d593cdaff0f. 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/SEAMA6728270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680b7db605b39883f112ddd0b23b52caa0c250e559fa254bf8e0270f4f9fa48. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/SEAMA6768280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490c4d0eb86910513893f455a0bc84ab0ac15258c1a359ce118090be76641c7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SEPQM0612351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe169752c35941a1b2846a8aaab7d5cebcc1cfd0b2ea939105b03af9fd80b09cd. 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/SEPQM0612338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f80bf0a45dc8a39edd75b6a186d37005ad9eb030af5a877b804df9257dcc13e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SEPQM0612342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015eedc06d5a0408d246ab1edc41411fe5c4409392a58388cf7cc688224f3c48. 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/SEPQM0612348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5521e033f54996fe8b408f8ac069803301934f70f9d8eca6972ef0f2fcc45d. 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/SEPQM0612353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2491e73d923fcc0962ace23deb0f354cfa2dcc8f8a9a8de33dd4dcef85ed88d2. 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/SEAMA6568120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10c659cad9cab35786dbdaea2a7054e799dce8cd3d82a5c6528f531865c95ff. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/SEAMA6768300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1a83f9e41a5a70e417f5e4dca515178c4d0bfbe7e0e903048a026d8c76c6e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEPQM0612337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce366170e4aa6674aa34dcc5c86df6b77b776811457c12fdf5ec08fae60607. 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/SEBCA1300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02940091064a3150a99ad4e19d210cd6dd8a261e84b634671a200acb7e03e27b. 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/SEBCA1300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de71e89a3bfcd216dba842f04dfbf8c6489892da45b522c2a27079f8362e381. 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/SEBCA1300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa0bf3f0d4761087434f78d0da49010b2120532e379bdc3728710fe22542b08. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SEBCA1300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1fac1423279dc5b50e3e04299d6cec690a4eb20d1d5cb1b1df231e1659494d. 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/SEBCA1300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dc781aaa815fdd7056a170bd09938becb9a6bc371f35105cfabeaec7ecd2c8. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SEBCA1300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0731e86bdf3f3d4ca1dc7875a494aa00333b9ffc55792d4c4e9f61cfb1dd51b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SEBCA1300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d41469cc186aa46c197c57a5626e0adcb9eefb4b360f70f4cdb39a5b639f9f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMM6700146.