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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c13a51bf8797076685f741b333110d9903b98c866a97ac4d9beb254e777c00b. 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/6092d48d-8f05-42d7-8b0a-1868436d40f5.json and https://artists.proofprofile.net/proofs/artist/6092d48d-8f05-42d7-8b0a-1868436d40f5.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5406a3a82ae61226590835a4b064bb6db5c84c9b5554b324ecdb22057fa0ab. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJX2162520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e9c71860265c570cc2549ca37b8f2be4cfd07ce63edaa299e0c03253d4700a. 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/QZHZ32175135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b409dea83f41b23942bb206b78564f5bf175877338d78da69d2acb8e3618cf6. 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/QZGLM2100315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b63e8920a1db32a8bfd23daa6be98bb1d2dbdf95e55a1c600a8d1b94977c37e. 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/QZHZ62217389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c29b990aef52649995d103cebaba2a94f5d79396cebf3a6ef21e186c2564a3. 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/QZNJZ2390385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e56271594256cf84c9ef0afc289493134775b14a2bd5c2e87f0e5ab41e8e43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2390387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5561be0d935c10ce8a1be1e31006e9d476a5dd8cac452bf88683c741675ccc2. 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/QZNJY2317273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c2f387115a4b012e795b074259b9d142bac2d54decf9a2af2a305a3f50790f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ42039607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1646f667eb096b36e9f005fea582c933298785c90874c78e2ab7dfadaf62e61. 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/QZHZ42039608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7eeed72723c922416e8370bc71206c8e72c6d50a79a846d76d055ee8c3323. 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/QZHZ31916301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb953781a63d6f5d8c5fd7a8ba5c7834481242edcea6e50ab05c7de783d7a3e57. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHZ31916302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7110275986bb4775e06dae68c2de75afd2e8001cda02403d75657613dcb064e4. 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/QZGLS1999385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a9a5ba5acd66b720ea8f05889ff2bd2cf8eda1f7fe4ab0e980963fa5c99a17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS1938904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270ff154c7a1b2346db67178e3bcd077619572c2b60749a3057c692f4e63171. 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/QZHZ31916305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883dc914dc85705a896a2f63aa2f5405ddb132c12652a49230ecc9d3422585f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS1989290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521a090eb9d65fa163d2a392e02c0bf6145b3a9f484fb2da72aeda4e8f70c90. 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/QZHZ31916308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ab085f90ca8f04f53c8125d08ae0b0c95b2d3acbb88c298b1949bcfdcb82b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2329818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e56271594256cf84c9ef0afc289493134775b14a2bd5c2e87f0e5ab41e8e43. 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/QZNJZ2390387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5561be0d935c10ce8a1be1e31006e9d476a5dd8cac452bf88683c741675ccc2. 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/QZNJY2317273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cf02ef4656bb2aac67b0af224861e5351cd8401492b1c7cc6fabd36f24fea1. 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/US3DF2250834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c758d2ac3a3173142e5a67a904cd9148f407fada1167c5fe39c4a75ceeb4500. 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/US7VG2287238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d90e94c4d8bd5ced9e177397449ccc2479b8f1ae93af3893be5f676468a0941. 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/QZNJZ2182048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e6d2e6fbac2ccb072ccd1ba6c42faa5b23175bb78cf5d8467576f750687e8. 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/FR59R2109155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb919ebfb2436c3e4738bd156da1f676fc1f7aabf913f92aebe4f5da685296fc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2048686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06017d3e70c0e1f3806dc3b44548c4499cc8d8c28fb17b6f63bf3da74d3d95ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R2002497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e43608d7e39cca50e1d57a9c560cc97d21e468104479b8d50e69759ddb06083. 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/US7VG2002035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dbfdc7d97ea385fcfc7d4ac79d2661aa58e7a04800ddade2741eac7d6e6c10. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2496244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586f4012a96d54e8d79432b364b1c3f55cc5c3b4d123bd0a8345989d56b7af2a. 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/QZNJW2470622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfeac2d7945c4ad40e15720ad1ad0973d43263f51e4c4a3d895694046173023. 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/QZNJW2470623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48647007863c0020bba0c1fb8746f9884267253fbf6f72f9dcbe3b04d70615b6. 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/QZNJW2470624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f114366e1cbab2d897b4b9885c8a9ab43726e5225d09f10fe0033d0bc915a7. 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/QZQAY2425466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fffe8b2b2674c138a5606b241dac8c0f8f8bb2c30f203905051536a1ce370f. 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/USHM82491568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6843d57a91f71dbdd62e3821db0e4d109c84b5a4caea87bf372784b0837e8822. 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/QZGLM2406402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6d5c00a4cc07c7ff9234703768689a59eeef9d7e0627f99a62831c4a4e8c10. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2520204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35af4a14e20ba3d7307257dfa02011e2af3f53bc87d17ed39860eafd812a8483. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2520155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffcbe6756721960c893a5e97b371ac03b0c6673390cc7222a06fe4be822520a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2517671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28140d4b16ffe890fed93225a9cdfb89ec795c56a8273ba8448e413c86d266f7. 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/TCAJD2475105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd934922321f6879cd1aabfc9bf5ddca9e3b11bfb5c2a96475c3f90637534c535. 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/QZW9K2480755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df88428f29e73002ca8d4affd4f52f01d66b21c943697a136a75b5b2d5a93bf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9K2432953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a148d2186f576dcc6b9d069543f49aa3e4d5114f4f0c7d62ec7538292951cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9K2423722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f80a302895a1b458e4f669aec6aedb3fcdf739cacf39931375a2a30d47a600. 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/QZTVM2463056.