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 0x8d41a475661dae94ba1441e69231aec96e48c13e32b8d87559d7c7861c64994c. 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/e0bbb530-0640-4bda-b24f-76855c618c4f.json and https://artists.proofprofile.net/proofs/artist/e0bbb530-0640-4bda-b24f-76855c618c4f.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 0x15d6e54adfb8aca42b0354e224ca64ad4671f76c2cdb9aba41ad902c01bd2f59. 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/TCAHK2373305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d1d2fd287ba2c919cb1582310ee9f98bd2fd2e94c35c1078c8207604883609. 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/TCAHK2395420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cf7d32595c698de09b460f6761f0c8c20b3d2dcc644574f44315d3359411e2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIL2440998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97b3fddc2e0a7cd065fb12046e436c980f6ccb4e13b7294b9d5fb4a6c80a0a4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAJA2401444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f66dab1b187bb836887ce7c144c65bb89689e839b6d5adae9348ce26208faf7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DGA0T2409298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6df7ab842fa05147ba51b37ca33353cf1cb4fb80b5baf033554318b8bca5a3d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAJD2430088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a51825c7c3fda25952ac9ea6ab40985814bdb6dc26c491f99dc8ffa24c5f8c. 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/TCAJE2500588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f727762f86f0982a43e697e1281b769331da65ebcbdf2d1601cb3df8f6ade2. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR59R2555911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3243c3b6b2fba902123a1e8b2dd6cdeaaeebde056b60515b82d5df1b7678defe. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:11Z), 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/FR96X2544533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b0c95d603cf533d519a88a87bbb2604320bd09f83a0c6a3b08a4bac800e8b. 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/TCAJO2592489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26619c90c4bdc285d692f7762df50680fc74cd01d4c02c80c1579372e0eecc8b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:21Z), 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/QZTAW2566615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12a61e2723beb900ee4ab231a6d37f041616dcce85bfa967fb688905830b66f. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCAJT2560873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e15982be6748e8666c8bd6e78b109c00638c2d4b404fb29995a27e59a7bbe. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:01:12Z), 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/QT65X2581943.