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 0xf8ef9bfeee789df3d7de3a62470f740abddb57867d9da89628b4c28005518ef9. 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/7d101d83-9f5a-4a51-b300-8d3911408990.json and https://artists.proofprofile.net/proofs/artist/7d101d83-9f5a-4a51-b300-8d3911408990.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 0x126deb71c45198d49aa2c0983f7ef44157013f04807f7055ae28e941f06621d1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:42Z), 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/GXF9Q2592562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617be94d2c2699e2452333fbf2988a6380eb6860ce9d89e62725d3d6f5724458. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GXF9Q2592563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f19ef404a2c8f6418a92f4c300309a6b75f01d962ccca46dc0a02b8f4b0031b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GXF9Q2592564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef67eac23c12cddcee8f5a7a753eba8ed913df699e74c09deb1eb3ce7eb654ee. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:10Z), 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/GXF9Q2592565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ca21836ee66847a405746d038605ea101a656185545bd0ff520b5c0eab987. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GXF9Q2592566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4b493af6ce02139e6108b3fa972a9bfc0970775ac114a454c6b36e6cbb9c95. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:50:45Z), 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/GXF9Q2592567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7590df0255a647290ac2601e2ac9316c745fbcb843e35a1ee995f75ef88d4749. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/GXF9Q2592568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c82ff0152717f03e23ee62426066c9f222ca6bcd6b17746811fb579eacd51. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:57Z), 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/GXF9Q2592569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99207e3357db92f10023d2da2d90450f925ffbc7c602b9a20d2cb4feabc4070. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:52:17Z), 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/UKXN22530576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c48a8e7aca7a5219e91c5138149ec5272cbc7cf31512bedcbe1fbea25a1a94a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKXN22530577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922b6c8d3e347e431eb3b83862d15ca14c8c0b903491c5541d5db760b84e3a86. 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/UKXN22530578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fde4d5a0d4fbc5f526611c694545d94fb0c636eb8a30971d69f951d360007. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/UKXN22530579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb871d5d063013dd56e2f94adbadeb3ff22595145b13bd2307ae2de6aa9602da3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/UKXN22530580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef85270525c896ba5cedff1f3f69d4b4e3551c030e8b78e038576f0662044e82. 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/UKXN22530581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e0c594efc4c9bb17faf022e339731b82858a731ee4ff4aa409dcf5dc7bd308. 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/UKXN22530582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b760f070c5c10d3b890aa747df9f5faea90fcb57c0204e3955d06f0597e55. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/UKXN22530583.