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 0xde322c092757ed6b82e1683c35d12673d5f51d0f92aff526d780c8a63d19e8cd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ae8335a-2116-41e7-a801-df7e813918b7.json and https://artists.proofprofile.net/proofs/artist/6ae8335a-2116-41e7-a801-df7e813918b7.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 0xa32451ef1dacbe4f4c85166952f703d3b213916a8d2195322f4bd81de67fc3bb. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ZAIJ71000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d574da7025f7d7f60f688fdc98a42bae6bfb599c33faccc310b75863c9a654. 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/ZAIJ71000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eabb7f509eb997bd3606ae69e8e4df1ffc911e4a116b568d8697da154d4aeca. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:34Z), 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/ZAIJ71000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6e6502a8dc1bfd547b0af876c9288bc1cc7ee51c30ddf266c6aaa72bf76d26. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:38Z), 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/ZAIJ71000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e6afc872d8f8106c890106edfe7f54d1393bb537797c3c2a7c85a0e57a0c13. 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/ZAIJ71000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b5bd79823f94d0816e510754aec353b3340770d4e00800bea418fd9bf126cb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ZAIJ71000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e0ffc7159b55de742a189bc8e00b5624c54a1496ed96684c18bcf0a33f4c05. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:47:42Z), 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/ZAIJ71000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6ddc2d771941079c1871b699accc8bdd015ea380e39d9cd6d07ace5a861c7f. 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/ZAIJ71000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459911a6f006e2ed2e174b1fdb65e1aff88cd0cf016f43868ee1ef9a062d8c3. 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/ZAQ652207085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1a31d52f7f5911a282e5ae2861fb1edbd502cf684d07ed43ad18148fd0660. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ZAQ652207094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54055a16069afdddfa3669d21de18dba46f62828abf1f63149b277193a672c14. 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/ZAQ652207096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159a130bac36454ddba7363c3508e0a17e8a4218ce96385bbbfef6456724146. 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/US23A1540508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fcb1da3e9a8d32a83afde3cc1eb9d77e27adf999635666d81138f72dc9657e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US23A1540514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159a130bac36454ddba7363c3508e0a17e8a4218ce96385bbbfef6456724146. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US23A1540508.