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 0x248924c3a3624dbf9bd5dd7572110f59d4c77d676f10ddc3b52aa4a387ca4edd. 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/4ac077fb-1cdc-446f-8660-a0bb91cbcebd.json and https://artists.proofprofile.net/proofs/artist/4ac077fb-1cdc-446f-8660-a0bb91cbcebd.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 0x481bd304c59a659e82f62e649b920c70bbf56c23aa96f736f7298754485b1870. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLLH2374314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18fda656b028a50a3e4c99623ace7f882e11dc07c51c865f16771174a8700a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEQ2412393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882507a355a66687cec8bdb1a99deec51441a7bf3fb39489f025360ad834141b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEQ2412395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea14aa98581f3b71dfa2f5a1d75eef2e14102f48d541858cdc9d1a98c91cfa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEQ2412403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d37548776953ee77a1ddf15ee990260d3638fc8276ce9d805783350a164be7e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMEQ2412394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c561879293002645e99695ca51fcc53c088540d1f018cf1b9163eb2cd69cde. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMEQ2412398.
Sea Dances for 4 Hands and Strings: I. The Puffer Fish
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2eb8bbe112b3b709f54fb3047acfb092231b8227d56cfb1d7636740baf0877. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLLH2374301.
Sea Dances for 4 Hands and Strings: II. Graceful Giants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55c3f6ce508dcf85fc804a931db325a49184199f1dcc87c5764fbad0f9dd659. 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/GBLLH2374302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eda8dd581e027109fc7ca155f4fc9c2c947a09618a648bc778aff1c5d768cf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLLH2374303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe117a6b0e701cd94948e0809da388cd2b6179792b9646b9ee26499699fbd69df. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBLLH2374304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c81d2d4eea5a597659e410080fc8375688c68279a6c622855f17dbb13cf93f4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBLLH2374307.
Water Variations and Theme: Variation II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e104041f4081f8cdc72a06682f7e7f4e0f0c5c52270fec18ef0e782ab9c7118. 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/GBLLH2374308.
Water Variations and Theme: Variation III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a91ab76f9b4b61a4aa76b95f2eb495e9e225fb70d7ac8b47d13ecf09da99849. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLLH2374309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481bd304c59a659e82f62e649b920c70bbf56c23aa96f736f7298754485b1870. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLLH2374314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890bc544719fe3e5716fe71069713f31cd74125bca1d1725d12e4e40ad988695. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLLH2374316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e17b514f1bd6d8fc97fc4eabe521ac432d774942315b82cba926191b35c00f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLLH2374319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c4e4ddfc2b31ff0795e777e508b911a6b7e50cfe4350958d31e26afb56179. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBLLH2374305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b570dd85df8b21f2ec45b24fef7f13293c62e18e8d792e4d4a845d26c037ea. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLLH2374306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b059762872c399adb3bb3aef477b3a05ef3f5d34f671b9eec04d428c3c99ed1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBLLH2374310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab2ef1f03128e968fd0e4531dd347e0264936d944c17a3f4ff6f3d3d6e75e8b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBLLH2374311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd824a487db8b125f1fd86850d7ab41b4c53bac098e866283088f9fbf13b9e1. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBLLH2374312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a08cc05bfc964a9261dc22f7909e665654c2781e90eb470dc045696a5d6bf3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBLLH2374313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0793b00533060f96aa77b6f6e8ab85a8beab98fc7e5f2c03ee63dbec5cc18774. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBLLH2374315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d782d60dcdf4aa519cbce3a955cc3f58d8b38d3498a6be61fa46ccad0845caa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLLH2374317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723711c78cd0703371bce5769061b9518052415dd9c0aa501a7612d64f58650d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBLLH2374318.