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 0x69cf3c2df214a2168bee034bac8497c6dbe601ea0f5fd5e3b174d3aa1a052f21. 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/9e49140b-36d9-419e-96f0-be90ce491735.json and https://artists.proofprofile.net/proofs/artist/9e49140b-36d9-419e-96f0-be90ce491735.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 0xde92feadf37b3f4402105df925294556e39fc492c552395ee5f3da2fdfa8765b. 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/QZMEM2460840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d2f6638fcf8c1b64ed6bf0486a808c6872604a812d9ee290296a71a9e0772e. 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/QZHNC2458236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4339b337d7ff6acb116a28d660462526fb08a096ea81a5a9f3e95f1e435dfb45. 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/QZDA42461330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23835cc0fa9740f436b6473a840eabc2ee5bbaa67e9a20a6f7d771dca083acb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTB92304154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284f85d5fe19d46f0930dc148d787daeee3101f0600a5030856b828d6a052d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG272306810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b0338b7be87e99aaa1540fdb281fab65d6453b38eb8cb68d24118205921510. 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/NLG272306812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad44d50aac396769b6268864945ad0fdd81cfa5e877769c45d39493227eddc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL5MF2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088aff2c789b62df69b2ff709f90a13c7bb1ad7c953233c65e9000294988534. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLG272105000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25a0511a43fc1d2f82c0c79f9d19b003964f651d2d7305b9301ac1e480c673. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLG272004791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a756b96fa89e60f306c71cc4869d5e36e72c3dc13c59c1cf216743750446635. 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/QZDA52537631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac520b64c63870ade31f09c765fe98bf4747972adb3d725a6150a5f4979ee845. 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/QZWFW2466032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec78a84474d14b1c154bd354b2ffeeda8594c07328bef5627dcf5fe1bd1a4f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52458351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25a0511a43fc1d2f82c0c79f9d19b003964f651d2d7305b9301ac1e480c673. 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/NLG272004791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aea21bcd0808037189d27e4a8d413508d5f8f9b4006827fd916dac50b5bcfd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLG272004817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5e8d9a7d65de3e85b841af1482e6a114d16f3833d827b94c3952a9614a221. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLG272004728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8323247ba319c145d1eb0a6712b8e30dcdc062ef787d37beddaaaa65a9641e04. 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/NLG272004636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5364f67fa4b2f4b31ddd6206b713342e54643272dd768287a73707607d10d24b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLG272004900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab617a2ec408e2111df8734e794c6ee2c31c0ebbc2dc6259d5b3a6860943037. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZFZ31961415.