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 0x33abc51f9a88d26f8275510e94166a349fc42a53c7d6384c9d53f8c95362b3e5. 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/e6a82e5e-86b3-4649-9b1a-64f67ed41854.json and https://artists.proofprofile.net/proofs/artist/e6a82e5e-86b3-4649-9b1a-64f67ed41854.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 0x3d0a5bffd2e8e827c10c57d2cc644afc9aa4b1993123537bc293d633b72c1663. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMBZ91927514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779bcbd073433d899f9d4caba489cf32e80868cf632dd81f903bd485a1fb2356. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:24Z), 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/QM7281924616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352a698f213261f97eef8b47092b6d30f7aed3f6cc9cc50395f98a2400439cc. 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/USRC12003347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5a472fa3b58b2dd562a3f501f2d473f7baed87e14e59be31004d783ac4f12. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USRC12004143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352a698f213261f97eef8b47092b6d30f7aed3f6cc9cc50395f98a2400439cc. 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/USRC12003347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30de2d7df10e95a5c966a913b4e9676f8665233e45a504e511c62cf337d000f8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USRC12004161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366e403a9d827768b62858d18e3b342a9ee64d8e350e07cfee266ab3301553b3. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USRC12102550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7383cb50e0b2345c5b07eb8fbcca975e19835a20c75a002ed4daf483e2727d3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:27:14Z), 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/USRC12102551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf731fa21d0017989fb739d7170188b73fbcbbc46015c3155941b82bf33b0c59a. 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/USRC12102554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04108f7b7baedeac655b7bd9f82c20a22deacb65546b168cd1e5f2937205aae. 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/USRC12203650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac06feb9418212013dbc894ed5dac37fd979e18fd7369e3c415fe9ed7bc6e864. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZJ842501127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec521c6116f4746557f711df50528dd6573dd823e8d7fed40586c12756d1972. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZJ842502335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a32ca1dbca09218c226f3a686ef7e6565cdd579d6801d6bda02b99e7f45f97. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZJ842502875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344ab6984b3d81572a5134bbec1a493ecf7579439a2fff04eba3ac66003fec6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZJ842501796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1947f94bb22e798ce72e8b022a4691139cf4605aaf8092bb35b2aa7634bf8f. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZJ842501126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f34a99f3612e92acc7a8dca0bc7f50944b2364a65c2d16a3632447ad087f01. 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/QZJ842502877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa784aa96c870ea82b33ad01a9ada1d4746ad288ea0367a7875894138743b77c7. 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/QZJ842502334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc58feaed236a8176bbd1400e2c22aeb81495e5091ef6addbb512614b8e20c1c. 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/QZJ842502878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab07a33acd4e1597923c52019e6175269a1a8181e72afdecd1e210a16f5329dd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:40:45Z), 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/QZJ842502879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec521c6116f4746557f711df50528dd6573dd823e8d7fed40586c12756d1972. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZJ842502335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e9689947f2bc38d9c82f1a1e0e7f8bf6cb17657458b9189d425ee5ce66450d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZJ842502880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc0d9bc1e632aa9d36bd81533f3c04d531f635d5f650afd3a47f47a337b41d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:35Z), 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/QZJ842501797.