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 0x0298ac34cf009023d78e9ccd683d2784365db7ee4e28ce31b5eb84c0c42c18d7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/089fdc7a-e538-4fb7-b298-a4aaa3990e4d.json and https://artists.proofprofile.net/proofs/artist/089fdc7a-e538-4fb7-b298-a4aaa3990e4d.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 0x462a67ba3acdb2feb9d68edbde4419021fa474a5cfba3879e11def7844399af4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWQ2108616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd4b0fc88c91f39fe470305e98ed874222693860dfb60dcaf8e55d86e277f8a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWU2177328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb0946fc295f05978afd7d16a577aa4c80dfa969d4f4ef35f7cb6eaa625d922. 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/QZTAS2139486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f252aadac8f6a4cb5002c8eb63172d74d12a67ad47acc97b28b54715b8defb1. 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/QZES82259018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219bf3f397c2598c418499b88ae4ebde542afa042639c56880d9f2bd67d4a12. 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/QZHN62264115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efc04ae876917f7cc8e4cc03a1c501cc76639534cc8b49c7ae097ffd3cc3bcb. 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/QZK6F2241548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f5cd3e7137bd16acc391eac32bfa067376a052dc7b833b04bda77d964ad3ea. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:47:07Z), 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/QZNWR2267291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd433679298cdfc517a26b5cb72b561b8179fda8c0280a6c9e2ff97b741e292b5. 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/QZK6N2376926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d37b791fd3a513f96dfa091ce7be2f8766dc26318eae8293ad21b57466ddf3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZPLS2355886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0b8ce3e6d9019d8d07859ad0a2587987daa618562d741c15c432a1f073b09. 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/QZRP52460866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da029706df4a20acd27664f776ef027c2ff2189c1ce39f29c46489b1201e844. 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/QZRP52460867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d6d0664480305d88fd628a2ca1182baf5ea33bd5b15f08b40c84bccf3a7e3. 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/QZRP52460868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083398dcc43f09cca25093394af3a3e3beeeb103529e5cc4055a4642a0962051. 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/QZRP52460869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c46a6cf9ef60656416b29f1960522e1a19b23d6136fbae701694eaacab38e97. 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/QZRP52460870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d11a2f2d36a1d2102971b69915240c0a534670b0b5446faf141bfee90a2916f. 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/QZRP52114032.