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 0xce4be09f48b9a5682d35d7d195a460d096bad4e99e61df5fea47230f4ce61856. 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/e724323c-b699-43e3-8ef8-8c724c73747c.json and https://artists.proofprofile.net/proofs/artist/e724323c-b699-43e3-8ef8-8c724c73747c.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 0x07e79d3f735f063edc9bb368baa0f7018d3203863d91e054afafac18aef6c569. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:09:25Z), 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/QZFYZ2368454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2a0572b152a2e84b65eeef9028fddbf4961222dc31abd6ecfa3238f5aac06f. 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/QZDA62321449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dad6bb38b8f0e1fe9e03fd5334804ab9f939815e5085bfd91527d9ebc95b50c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTH92373397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf3158b1329ad09410499a78962730adea0a49ced69584601ead511db3b50c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:00Z), 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/QZMEQ2361457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5117f8116e1b36aa3cfebbb78297036c899238e00c416c9661b8c2ab8c380070. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZS642302190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd7231597c0d418bd175f40cfef0a95fc83a18fc57c02a3a7613e8f55402251. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:56Z), 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/QZS642362247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b72fa05a1cf625fca194cc4cf311cb5f3770f5bdb7d9f53e2592332ffdc8f0f. 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/QZMHL2325409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376bfcca6e57a7494829996ee556db8c9b05cff1747cb772c406c534f58dce1. 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/QZS642358445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c2079794b81d05d36805e467b0e45b71735d4355d75a20e2ed9039c5b307df. 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/BEE202400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc606a215c3e72fbafb1bceda484c471ff81bdf233d313e4ab95aeed6ea76a3e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZK6F2440745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350d034634743b444914b57d6c1ccc6aa1a1d4d4c7c12153a4c2ac84a5a8665b. 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/DEH742426989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b1b5493e22dcc4e7d19adf4754de293964fd5de6bbeca9fd477ec6fabe9e8. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:01:43Z), 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/BEE202400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963af02e026f6ac4141b98c86352d08b743cf058b73d75098865bed33a5d9e86. 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/BEE202400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840fa54baad539ab8c6f0c31de396cba2804ea05085167f56191a672378590e9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:31Z), 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/BEE202400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3184b67e48e99656a1cec54b3d4052195c1af7795fe7b4b3142594a91e2f0ad8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ8B2472074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d30f96f3f5ba05758666bff35a43f63743ac9b69521fa152be0237aadc9c569. 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/TCAHH2304585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d2eae1d704a7265dea01b4c79ba071d318d9751e9a0729bd85f16221892fdd. 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/QZTV32324235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5542c7036afecae41583acb7e57fcf3a98ded5671fc67dbfed1c1abfa0868a53. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEH742503601.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch