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 0x72905f0fa07b16681dbfadb549e1c0ed5647747fe9dcc77ac7bad75a864bd7a9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/462635dd-5bec-45f2-88e2-c15290019fd7.json and https://artists.proofprofile.net/proofs/artist/462635dd-5bec-45f2-88e2-c15290019fd7.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 0xbe80ee2d9df34a4ed00e03ef4fdaf66140b47b6d3c6ad8c59744918993ef7a44. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAIS2405774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd409839a858898602d034e3fd7b243f5aa1ccb5782e050b59bdfe07480b8c1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIS2405798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab245fc7f2fecfb7282b31d6eb47b5be7d99df39a7b9fe1a09bea54392926161. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAIS2405804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0041e47a0325a22ee13a4fcd21ee6829eb5cb3614073ddab74e13bde9225785a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAIR2405810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ce38f5fbc5864076991dffe9e8f0a26bc5bd9f671f3ef97ff9e700d75af58. 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/TCAIY2404927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73b2888e3a7a707a8dbcebe7c29f2fb017328e28c4efdbb071213d596d7ad8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIY2404934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d885aee951d5cea9afaa0f427f148ba3d0bcf9dd21b6dfbfe7ab3219e83dfea. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/TCAIY2404946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce001c1220b4a477cf140608b51e2e62580076dedd5e4b98d7b89deea7d5a87. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:12Z), 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/TCAIY2404956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7624195a471f31b127056f5c27b67a2117fcf83df307348aca2b1ec8ca102812. 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/TCAIY2404975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8690322e2da44b5981920341347485e28ccc27faa40ac7cbe157cbfa135da1. 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/TCAJN2532095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafadb0b095472a57ec5cf743e2a7c20bda250864de7458b42c54c88a30c6c597. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIT2433284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa28d783b84556e31c952c493f726cd75099fd1ff50c9ca0ea95c17b4c8d9b43. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIT2433613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1350b2e9e406e6ad266f77be37db9c8b729ded4e7da3aa88403fbecdf89a410b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAIT2433619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c33402cba416ad4f4332be1d14eb29ad674bb9aa6a081b61d92f7cefbf6ac77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIU2433627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187ea527b11e1332dc2cea3cc98c90c14da1131aff4b7fd8b6d17a9cf68d64c5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAIT2433634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba903b220fbdbcde68b55b67613a1f87be55b70f925b6ff7811534ac02db0ffd. 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/TCAIU2433682.