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 0xa1a17fd8b4481ca2f391eb4b76533dd97b6e134585d9682a96062f7b2740d928. 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/e3f4e628-aa51-4f31-b7af-0995458b39ad.json and https://artists.proofprofile.net/proofs/artist/e3f4e628-aa51-4f31-b7af-0995458b39ad.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 0x7cd1d060abab26a292704d31b879342175288b602233cf51dab01e1a142b33f2. 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/QZNWU2388174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c8f81f476d2bbae069e0b518022138247f47671a361f3c0e3932f0dcb1921. 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/QZNWU2388176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6023fe00a04440ab05ce7e7d29ac453845d7f18e9d4003dbca8e453a7c3bc4. 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/QZFZ62277713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83dd0f87fe38ddac2b38a6822e8526fe2747353b0e8e7d52763acf3891f3f71. 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/QZNWU2388179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0032d92073006759e38c4553493fe9ff73849db060d96185d613a7d7f518e8. 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/QZNWU2388181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a9542419df6d495c34a346af50baf35a43ebd503fe82365457a9f4bf0d0f6d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWU2388175.
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 0xd04672d3211146d956f39dd0aee37135bd70a42ba0baffabdd3c1ff761d60c56. 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/QZNWU2388177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd6b8e56eaab62286b6767352b368ff2cef493121a8c79acef40f30621f6df. 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/QZMEM2209828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7cfb956f22508710af884761ff3020028570366d85aef547aba1a209bcbba0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZNWU2388178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ea91f2ebc5acadee74b367b4533da63cbbf17acfa7baa26f239a7beb948e3b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWU2388180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e91d122c831b3fce028acc25289e2cab0e3de530235efd0806872f9f0558c69. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWU2388182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dddeac02cfc4605de2585ff482e0542a521ea1708ff45e2dbc92295802db8a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWU2388184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad299a151e6ab7b94784bb629917b38c0363384c633df0a2e4b0bbea59696d99. 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/QZNWU2388187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9938625c5936244623bab518ec5f47f788c9d95e4f3e6193e81259a7beef558. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWU2388188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe8e1adf215d631086fa6cbcc821725e03f18ad3d587b9cc846d7ced10a2394. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZNWU2388191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8454161095991bba9bdccf174d6e383c5cf623581676a81cedd41fa989bc2. 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/QZHN92297356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba3c3a7b98a9330dadcf5327579f22a56027f45aec9298c820bd7f8ad3b7fad. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN92297350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7f39ac9b1e01759a0ec609b5b04584be94065a58b93852ed7049c4dd227047. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN92297351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca48c260eadbbb80e995207539459bd044b3d08c5b6d32e8103a0fa45a349c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN92297355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc11980f9f05cf151b7f19665d9a370be3a85997a57e062ad906231ee93c3c3d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZHN92297357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ff315f0ae51deefdbe330fcff8190bbaa7064fcf6276860e992db4b3407476. 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/QZHN92297360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2ff94422f68c8ebf1715d98ce872c497ef3a522fc39117509db78f033db544. 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/QZZ772463296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01726a064d41e545a4046ac25534b831b66a95d41cf2163753921acb206dd1b5. 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/QZTB92276968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa92235264484747e8237b6d39d63a27b599d2dc9c3850dbe23e0468ed7859f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZTB92276963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe53ff5b37c4375fc3d7cd5da47e7eac0341557f9b6a81fffa6975b58d95310c. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZTB92276974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4814a54d2a3a7a2d256a8b2b105bdba0b3b2baa6f60afc039c48bbdff7a38fc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTB92276965.