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 0xa21a8a131d3871376701aea0dee683a9747a48cd93092e7489c7ae0b75ff55d8. 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/790429dd-13b3-4123-b653-018af0737b68.json and https://artists.proofprofile.net/proofs/artist/790429dd-13b3-4123-b653-018af0737b68.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 0x325a6a584e70f5f15a804b3e022dcb2de533bbf5827093e6942b8c17beaef6a4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZAAJ1800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a6a584e70f5f15a804b3e022dcb2de533bbf5827093e6942b8c17beaef6a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZAAJ1800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21bde30805dea6478cf0391832cc474927363fd196b7ac50ef1575d2c3b70ea. 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/QZAAJ1700886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a26eda426d748f2febf356a6a4a6f6337f50c8b7af21378a0fd532f31f15944. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:54Z), 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/QZAAJ1901183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c74e505a8fd77779b715d81b7c99d4229118128140ee2318311477d87d697a1. 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/QZAAJ1800893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19818d1d00a140f779da4f1f44a9d3b0cf409cf5f212f61f42972897e3f78c15. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:35Z), 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/QZAAJ1901470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ac15833d762612c00c17e2236ad81ae66239fabf051f983b243c69f814715. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:47Z), 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/QZAAJ2300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472b8a6819437e65c67c7de1c4df2942a5850d1fe9af6463523865b8eed85f93. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZAAJ2101698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff2410ee3af985727930d2cf838495633a07a1f8aa1ba0effa0628bafa99201. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:03Z), 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/QZAAJ2300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb13e828d6bc2696826c6a548e674b6bc8992b91057f450bbc53496f18e30b2f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZAAJ2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6ecd0cb850c428d6ee1988afdf98f8bbd9107ef9d64816dccb5f106463aaa7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:13Z), 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/QZAAJ2300665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e1e810374c0896263fa976220969eb82e7fa24a04d50d64569ea1f680177de. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZAAJ2300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda89d4aabfc1511be97aed56fe8ae9470c9a5b5252aadc0b163f2a7be8cd3405. 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/QZAAJ2301029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a947111313dbf0125a6c71a71c70acadddb2183b9cf97c9cf5e9759de28f7. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:57Z), 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/QZAAJ2300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0779a829bc8160ff45ea79e0e587838ef367746b22560e138bb33f59820b0ad. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZAAJ2204897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9486a011c308cd1cf6508ba1973ef0978570b32f65a8c3f213591ef8a3f1ea48. 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/QZAAJ2205244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db98a13fc2223fbe27529f93e7f417dcde2a57b5577be2b0b24ce142818b01. 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/QZAAJ2204896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64d00bf052ac3fa78f2c335d2cc7716514d5f667484d638320a08b05355f705. 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/QZAAJ2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dc4ab385b15596b868667264377160530f2df1bf8996ce7ae78e1d9a915cb3. 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/QZAAJ2301172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3c224bae35efe794c6fa96be647d5a1655874919dcd2b329de52d475ad6c3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZAAJ2205245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0314461add403807017c8b8ab922a1326922c5eae2e21acf8f612ee275d09a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZAAJ1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cbbef7989db2877186ca06f46e9258fa5e19b72970c20e24dcbd7ed18ae7db. 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/QZAAJ2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41efbf5e5b9870cb193b11cdea1ff911a1806783a89cf1288b5eec7d8f5ff1a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZAAJ2301588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ebc805487cc57e3861bcb09f54e289f9c7663186dbd29f5367531a22838b52. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZAAJ2400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4783d1598ec63bd19d7d4d2c726b96a0d8943d7d59ae0736db97ea849a9ff92. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:11:28Z), 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/QZAAJ2400186.