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 0x4c9bad41b0e7b4ab9e21f5109c181f964cc99355eb926fc8aa10c81777b5aa1f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d21be9-e70f-486d-9a6e-74c5cc587dac.json and https://artists.proofprofile.net/proofs/artist/97d21be9-e70f-486d-9a6e-74c5cc587dac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
„Daydreamer” - Bartek Wąsik plays Radiohead
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 0xb7d63dc8fb67ef83c36163f860a693186278bd906e7956389deac36da1e87356. 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/PLB822500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce96b7dd6cff0beccecb0818f0642cbe53da6ac659c8443a4f4292639130ec6c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLB822500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832bb0f691a7773518a6c93a93b69bee923146d987692d1a8d745b7aaf0793fe. 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/PLB822500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe877079b9bd45eb6ca7bc2d8714419315165eea2b2e31ba5348fc412c133402c. 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/PLB822500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa661cb914384f3b71e5fb6024a22aeb8a49d16001701992df9883dacf8b21e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PLB822500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66fb6580469a4b7d9b7efe12dd44ffb97134b480b8846bb952b291b549fc6f6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLB822500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab896e817c8b003e9a161a63f6c69b9aeeea325cf8b3dfd070fc839f1983df. 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/PLB822500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2eaa14c1bb60accc2a6ea381d449f445530a3bd8d69defeb8d262d870ce10. 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/PLB822500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb2d5ef9ad6c5c3846389e4f4f962564d719c437d240b9b2563704ee020ff0c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:40Z), 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/PLB822500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d63dc8fb67ef83c36163f860a693186278bd906e7956389deac36da1e87356. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLB822500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2af6ccaa0f730589b7ada5f03d2ebb2bf11f61712906d14603c0cbd39e63ef. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLB822500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a5ee8fe7789a5ac335163020080f8c376066d55cf2558e5a5b43374c0caeb8. 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/PLB822500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7150510007575f73d1a2ced5df5bfda7448eca01bedf1799bc650f18f26028da. 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/PLZ042500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b0a98b0cf94b9fee3780764eb515152fe6ceebb17536bde5f71adfaf1aba86. 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/PLZ042500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf42585cf99ce4f762c5f87017682b57ee9b2c39efe9489e983d4c3b4841953. 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/PLZ042500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec623e48dafe3cac668db80f229d0f5e0c08022f71bc31163d3dc609fecacf. 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/PLZ042500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c6f43352a41279ddc2bc5edb75a1f522326e46aaff456059b24ec7f03847cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLZ042500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83979d140767cc9454aaf8a095df5747fd0f61c87bc5db8afaa1fd844dc15e1. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/PLZ042500020.
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 0x5366b7950c5225de5c2ffd6e965d6de5c0714306add31bc1728da36d1fa0d305. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/PLZ042500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b68f36207c825e87e53b5360f0f00358628974f1a1e6fde5d4f94719df1b0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLZ042500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ed830b33cbdff50a85a07637c6eab0cdbc2939a8eac2f4185cc75106beca4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLZ042500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21cdac5d757cd02da6ecee668a5e65ad6ff6786de2c38c91b61321923bab59. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLZ042500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af4afeae681353b01fb0e56663e0793ee43ab3ab70b2bb63bc052f842ae9177. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/PLZ042500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2f40d1af2a663a978d72ae89fc6110e818daec617edf8faffe674a0955e394. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/PLZ042500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5985d7f7ea913a76cb89be65e732a8331e924be714e7662f5c95b68019735e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLZ042500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46463d3dae728c2cda0c9df50ea757e6f41db204dc7ee1f9164fc664898eb453. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PLZ042500033.