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 0xcde072182deeb29809c4e4cd21f6ce416662e79885b4cdbd2986339d57673d4d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12419e9f-ec7b-40af-be6b-a6c013630495.json and https://artists.proofprofile.net/proofs/artist/12419e9f-ec7b-40af-be6b-a6c013630495.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 0xc559deaf69b94cd590d9bfa7ce24c95f6be44a91dd19113de484604b67f8aa0e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6L2076492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e186db20345e97dd937c3fce35d193b399da3f02e6942fa4b7b195b728c011. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6L2076260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd07256153f721f517ecdcc85835a86a35ca5fd929093acb4c52ad4a5784c43. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6M2064361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349b6776655a28522729e349b288e1368d7981795c0ed4aad053aba87930805. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZDA62186974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca10098fd561bd1c244c011ecc06da1876c859b7d011c4f7416f7beda03276. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92186716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77836237cda38d00224f18d824cac24be07f6dd3dca86d8661ff190acb8937db. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6G2154312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21258d9874324f49d75cd9a5c1c3a3eb72cb9eb06417b8e8fcdcb507d99f10c. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/UKF4J2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36c4fdd82c79931959b864cf7bc93f6adb8b6be078388181fe3b7521165b611. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/AUMEV2237433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252e381b1e4e03e3473363975e07afed6d6e0d1792bacf96263e0b359042d6eb. 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/AUMEV2309851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd4fee4c0f14fc013e755a15d7d077f6319d0dadbace1d46cf1d06d00d21c5. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/UKF4J2304280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85ff28bed48c711d851ab72e95c73ed38ad693e55633c1b6d00608838275854. 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/AUMEV2388294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab24562538b9067a57c7cf89831ef9a6ec38bcd7036d583e2a5543d64df01412. 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/GXBLP2301014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6d5bdb65b4c7578d1e1cbffbb845dcef3b87b8624c5ca057169328ed77a77f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIC2453113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1549494c0f9dc0cee09ccaea77614902464154e2719d3fb728f82444b387aa89. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:52:00Z), 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/TCAIE2433500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45146ed729e623ee55b42d9cd80d1d0fbb6d35630026515a4214ee8f8147b6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:34:10Z), 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/GXBLP2402075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e73532c2065d963cd8c8506227eef517a2c7477ba409a3efda7cfb122478457. 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/GXBLP2402159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725e1bbff9fb6fb5c4f4da5634084f5f4b4e901d7698d0c8839d89e4c5f449cf. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GXBLP2501039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918fcbc180e0120ba305d728f2e8b03d6629f4934bd399abb47701e53f63fc80. 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/GXBLP2501261.