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 0x854e238faf0bfca851739146a24055acf638649afc38ac57fb7146b87946d26a. 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/a532ff9c-6cd3-4dff-9b76-de29d111b2b1.json and https://artists.proofprofile.net/proofs/artist/a532ff9c-6cd3-4dff-9b76-de29d111b2b1.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 0x84473ba98436469083b7bab3c8b514346d2365a9414b9c8b7e0df84370014b94. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF1951707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a5f926a61225ce66186a0ea88417961f883c97e3c15c7b01efef5a62f15881. 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/US3DF1951697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21251b44aa61ce7f9d87fd352e8b548e02b7dd120c0bd39a460ad14d2e0ebc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF1951680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e3495faf10fc6d9a8c633c73104ba28b84f35cb2abb1c789d9bbc02c47490f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US3DF1951681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d3c00f6b047b21b40d714fc2fa507d209e029f55c2b53533d4f48031f6d655. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1951682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a86141362325e2a1fbcdd25bb6aa7f3c8072ae64c5d0aa2a4c79ed4e909121. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1951683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5e7b74ba761bdbca576d251426f30e091e394a8fc75908e07853805a6fd9c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1951686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b792d8032e3c12fd5ead5427def2a7a51b9997c1d862a5a7449e5521d332d92. 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/US3DF1951605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb47e6978c6fa0a6a4bd6fc5935f8d526973ff236f677d2d166c7de276c1b868. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:34Z), 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/US3DF1951659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981141aff62dfd0dfd702f9733472487179e705a2dd84172668fef3fdab8794c. 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/US3DF1951668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8290763b828acdefcb5ad33263f98c77fb4f58fe6d992461eebab8ffac5be1da. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US3DF1951670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5806ae7494e10305079a0a286a4415666318f928c8702828eb592e3606729. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:13Z), 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/US3DF1951673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35026b1b376e509ee441d269a196f4623939407a96fb1ebfe0055fd5f198a554. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:51Z), 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/US3DF1951592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb794da0c020a396269ba4051b09b760c6c8822678e10aaa03b76d09a1d097a47. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:31:34Z), 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/US3DF1951595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc14f572d23c2f34b5d40ac9ca123106bf3cec21a37449a697162a6c5a52211. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF1951597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933c0295f934b00222e8d859f34ee89eff4622331c76c8fe27675861074784cc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:06:02Z), 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/US3DF1951600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f64562f03bb5a4081792a57dd9193d4e4a13ab5cf7f99a281e72c689a1b64a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF1951601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15324a22d045e27ec18796c464fc2b6fccbebd676461ba1cb4649beab6edb1e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1951604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6308c60503e1786f7c151576ef9b514194e39a3072d25a819340fff69c5fcac8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US3DF1951574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a659afe8f8c88b4bca4c3b9a8b5ab0490118cc2845743c943d9e0448213baf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF1951575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbd6a13ea4228049ca13f6792687c9e638661128b030934bcddf2656443c3b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:23:28Z), 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/US3DF1951577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808cdff6de1b5e1b32a559a1aa6ff0296147a46cf652f9989478db90b1b012b2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:31:17Z), 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/US3DF1951578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea715c389e1ed56494f47544ce54a309f450d97a2fa33bccf53b575d11ccd104. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF1951579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570d9ebefa6ae3c82bc6e13aed6cf5a2676af14c3f8e95fa6dc9939d293dab1. 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/US3DF1951580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a30c0e0e450bbadeeb25395a052468e79febe4b8e865a3ec0c1ad93a2c9e669. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/US3DF1951581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328049a5fce60c6a815ba80c5080c48de2bd7af9ca3e7895e4a6473485a2b454. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1951583.