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 0xdd549f6d00142e926b6d27fdcb03ed6efc021fc69f9052f60b85a61a339a71ca. 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/9c187504-84d9-4e71-967f-6be0fbf8fb70.json and https://artists.proofprofile.net/proofs/artist/9c187504-84d9-4e71-967f-6be0fbf8fb70.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 0xbebd56b2863bf52770bc8f28934bad94f0373389da323eb7d5a48680916166e9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:12:32Z), 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/QZMEQ2210745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d20dbab62dc7630d26fc59777bc343e691b85bffb2dcc15c5ce88d4004f51a. 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/TCAGY2387907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa1b408a5b72ac1936f060a24ce09155cc175be9bff9613a0caa5b74f393de5. 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/QZNWT2284140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa1b408a5b72ac1936f060a24ce09155cc175be9bff9613a0caa5b74f393de5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWT2284140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb36f0c8103548b9a7628fc773ddb4fce502bb7116d8c9fbcd7d782a3cedebf4. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTB32297709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272d50b52a5605b43938a1f3c3346dac99e5050fe1d20e234f42a845ecc4749a. 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/QZTB32297710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c4584bcaa036bf391395c9866d35dae624a175d853c974fa9ee855ae351c6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTB52297834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f17fd09e4439dd89a036df6c62a10e48c2a6d4427b0512f936840c8008acad. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZTB52297835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd23b4e431de292f9463165dbbafb5ba8aca7b1a0d8c8409fabcd9b4cb6f56. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTB52297836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2715e95efaf46b668b727a5b90181a4c35829b38eccde765145870c12baf6b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFYX2393957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3953ce5817fa3f6fabe86244abc6d36d66224418633af857b5a177b77e2e634. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGZ2391714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2237ba4030f0e04d70f9891e77b2d6b805ff0022b580764e1f14ee8d3f6fad31. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCAHE2351608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc21544dd4721f549532ce200612cb7035031c268d90c8d06b0b89e45ae3d42. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHE2351611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2ae17c207cd99a517e31497f81e33b49f032b6d30bd029176b4f10a82f7e25. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAHE2357911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa260037e2019c032b50d567696c87616e930129dced77d50c3a194e52d21210a. 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/TCAHE2351614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1123b3b2632000f7843f268caad38077fbef6a2de266c6793b981aefe0838db9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:45:57Z), 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/TCAIX2482525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ffee45410ea163c7aaf6a3a866c6e924241da03e76da651d3740850affce8b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAIX2482530.