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 0x50bd5d3edfd680d788e0b5bc6dd87de427d426a82f7bebcf19d2581f8d7c6e21. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/114cff79-49af-45be-9fac-921f7edd31a8.json and https://artists.proofprofile.net/proofs/artist/114cff79-49af-45be-9fac-921f7edd31a8.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 0xb2082557c70aefe61c432e14819b019364961c4e0bd97e72ec164955e353d93c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:33Z), 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/USANG1926225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1ef48cd6840b858fe6061afaf4ffd3f55947893d722bd9adb02d4373c8d7b1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRX202024928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b99b69b6a8aacf5d64dcf084e730bd2b60be1aa1fdbe6f2cebddd353e0248c4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:35Z), 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/FRX872034227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a13c39e17e1485680e3a3f7d5ce5ce34fea97f6103a0370068119df197cb9. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/QZN882135395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a44688f6a6f8e0890656bda17e6c6bf4f3c86fd5f01772d72cfeefc61ed67c9. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZN882147401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ed6c5df11e7589c27d4e07152fb3915dd3abde6ea9ba36c633d5498f41622. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FRX762175275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4491525f971ea0b5914ba203e5cafb3bee6eca6dd216333f484185658510f277. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:16:09Z), 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/FRX762176214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befa8f922add83410795d9305b2c8c9d37a54227cecdb123da49d55a7ec35e5. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:46:51Z), 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/QZN882178644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90407e398a8c597496d855b38b08447c884cb516a3928e5d759de238074ad820. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:56Z), 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/QZN882225262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff62f8475d11cd3dfe30c6d4e1d286e46adb9756f84dfee239e34219be5ea3f4. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZN882232922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bf26e7052a35aaa8483608374d2b858c12359509792f987013ed57df72c49d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZN882236430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e9930cf353cad3ae4bff8ef9ddd558c3e3d5c748bac7f518315acfbad79c3e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:57:26Z), 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/QZN882241846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ebf601e58deb9e6c6d5556e09574a91280144a6d1c79c592168c59da07e21. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:46Z), 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/QZN882361132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7846a0e9af1e6d3f37f77ca50ada44055c37f48146d8ac90f2442f7ea7ee9fd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:48Z), 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/QZWDW2304583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580039bc498f35f780d1771d38222c38b606e20b55bba4d54b1c8b2d39570706. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZWDW2304584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc107d4a89779f85cd9066bb14d9340e3dc74902eb78156323f48cc0a9b576349. 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/QZWDW2373395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a4128e2a05a9a4456973bb289398b3c4bb81535700c9733d05a8241ac7f3db. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZYFZ2324108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac6c11baf202ba47218c974e68437ca3b5029d2fd81cedd4798a134d5ccd679. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:19Z), 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/QZZ662338602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc5eea1384e7b3fbc67c502244cdb2dda149553e8bede5bb8bef04457d28420. 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/QZZ662400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9ffa3d6c04be785e13c0ffd1b82c9c0e3e670e9b4c2ec2f79a1c812f72fcda. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR59R2466320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc640ece74e9195d17f2cf279db9835d6082c8bd0e2af450de1a7d782df29a1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FRX452447681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5534b2b8acc42030090c60ff594f03b7be0cfcbcf414df377d411f6c4ccde7. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:29Z), 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/QZYFZ2463165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd4b61eb49d964b727436cc9ecb2d4a985d780d2a0bed19221d7a56f117eacc. 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/QZWDW2402776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ab06c683f7f927523c8c5014b5332b125378fa24a222acd5c712d8145f692. 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/QZWDW2436683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716a3af090ce8c70eede380ee8b7786b4df77f84a30c11517a7e41d13a7a03b3. 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/QZWDW2455428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6622c3ca57d692eb2588f75a25e00e72f30caec256cb00bb69dcfb050df16e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDW2478768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0665065d0e5128e20253ce8a755f8aca346debaea7597b0a9ae8e4e70853d4. 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/QZWDW2533667.