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 0x59f8dd980151531be3b4c81ac7fe789fadbdb8d175f081d07790965bfdf28c32. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/306aaf1c-78ac-426f-b62c-f8d86102c1d4.json and https://artists.proofprofile.net/proofs/artist/306aaf1c-78ac-426f-b62c-f8d86102c1d4.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 0xeba0d928194044bac5cdbd36ddeddba1b4d4757412ce7f6c45217bd7e4993fba. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR2X42007892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f459be6b4b1c027996efd490e0b7540952357a4e5d78306c8db1b345a751e1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR2X42007893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270d1ae66faf160278d1381edefbaa9792778ec29fabae2991d27ed8bc7b5447. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:09:33Z), 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/FR2X42007896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7016982a5662994a217c463a3bd270c36fdbe5bcb009f918fd99379d4301d0c8. 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/FRX762040677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da19b626e6e41aa714ba87e5720e712cad9f51932eacfda8426b2cb0ce23461. 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/FRX762040688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43362dcdac512a5a1cac6fb8cb82ca2af793549bb66cef3f12fcddd34acf55b2. 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/DGA052015255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8221cee587e7bba4d7b943bd941835d0b637e1782379094c6c3bf1d514e7c54. 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/DGA052015261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc79ca8fadaa97100907a762c4b52e123266b3bd784ef0a5837a32db8939d196. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRX452352919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6bc165856e9c44275a71202cc15f57925eca583e47f09a376a863e2335da37. 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/FRX872377206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aeec759b6141bd886bcdcfa70aa63359553cf29e23f1e0c79d7a25f6b313ff. 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/DGA0M2362278.