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 0xa9e71d5c4c36ad3db77867af99e897bbf1d51e2951eb47c984bca49e17ea0558. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ee70cc-5d65-455a-adbb-9807d44adb4e.json and https://artists.proofprofile.net/proofs/artist/a4ee70cc-5d65-455a-adbb-9807d44adb4e.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 0xb8a6d09475865c7ad55df881f7f65264cc64c55daa4cb3a15341546cb1c7fb06. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZK6Q2286155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f21064598c7dcc220ab7b23201a141430c6ab2595b94a3a402b69b4104873c9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZK6Q2286156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc054b5be8f2a38e8e2abedf67e4e7b5e431e70d72a4c5216ad6aa898ad9c9110. 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/QZK6Q2286159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648a2f8d2aad265e7ff76f1609674efa560cbec28bfaa052ebe0697c470419c5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:56Z), 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/QZK6Q2286161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0118664b4c608e43ee2e115c767fe1212f35d67897da1dddbb9ab1a2d391225. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:28:57Z), 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/QZPLR2291879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f94155f838ad5dab1c81268b95ad3a6187cae0080f5f37a75f76ca9025e7c6. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZK6G2304606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37efe6515b0f9c821aca61121e35aa154aed483b0fd8f4eb43e2b98bea6b1d32. 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/QZNWU2374280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe5e6f06f2bb8d2f949750a0789b00ef02bee6acaa0033d5be84625c9451bf1. 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/QZHN62441290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40c40a5dba10c18bf3b0eb2bc189ba17254dcb55549b87669c3d82241f25c57. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:04Z), 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/QZHN62441291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4dfd307b43ce8b042610d9e7cc64e322637f4cd2349a0f50175c175a46dd31. 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/QZHN62441292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00308f02ebaca98f62ae5098f75b511c4bd63a29a61dc1f83b8578c05c5ae83e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA62418370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab266a4b11ecbbf95af42995859f16bb0c470d02750c23e25d513740a2ca416. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN62441293.