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 0xfbf595a83d19ce0bbb0354a3630e280703987cdc7e07737b2aac9569262419f4. 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/4610ccdc-1de6-4301-ad60-738ad137709d.json and https://artists.proofprofile.net/proofs/artist/4610ccdc-1de6-4301-ad60-738ad137709d.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 0xc988000fc272b29cfc879e147f31b88ba478b606f522d0cbb2d42d0cba1b4d3c. 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/USA2P1942384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b5d3f89263a64207ba9148891413628fdfc073a422d6aa055144f4f2e5b0a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USA2P1814941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40e04f3252f89823470c022518bdbda8856a7d1fc67ff87136204e0dc635505. 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/USA2P1814943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593fbce7b9fcc91bdd46b908a22518297e96f48f80cf5acae7cad5e273c7a06d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USA2P1814944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5df245d6a2e418a8fcb21976907461fa4cefe46789b77983802ebb37a220ff6. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:07Z), 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/USA2P1814945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c4a674334c754446ee5cb60038b0ab8572d6dbc2d551e45a034a4b32ae3fc3. 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/USA2P1814946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0a934b9aeb2fb3d0b83d84c23ea8d5a6e6d2e3634ff2bef2b51409d55db5b0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1814947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fb48f0e2b6199b9340035ae67275a21066a51f4b006815c94a5bf36e7c7af8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P1814948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87bc74869d9b3ea08917cb93fc363ae8dccbea462b921a34fe73a773ba17afc. 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/USA2P2116146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dd38102c9c0683e8fb39eb341d43f2d7a6153ebf879d2e365f5f6592e7c22b. 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/USA2P2110030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b597d679c6ebf2cfa1d3c0a82b81d2e5fb6d7f917ea4cac26c219b3bf8508a8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82438740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395071b80055bb5b443cfb5ff633c2285fb0806f5ef18a295d7c69f131ec858. 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/DEPI82438741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f632e54b187eb74a6f22b124aa56ff6487ea83662b87352e6b7e286b6c5ee. 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/DEPI82438742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996314785c442012f9198698a6907803ffddf705393b008d3d5fae1011a5af07. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEPI82438743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cff5ef917dd45a1b4b136173f90a9d6fcd4178cc22f8cd626ca3a16a6bb5d9d. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DEPI82438744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aba4d6f856c424b87be29dbb45d79fa5d76f338d8631e19de746630886e437. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEPI82438745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18610db82e611837ee5860c8c31c068193b81781dfcd4e6be2841491d2f54c28. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEPI82438746.