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 0xdfbe4ca017e0478f5724748aa0a0e66d4b19cac35d915df4bdc3e65f112765d1. 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/468d346f-1b27-4823-90ce-8f942ef75b91.json and https://artists.proofprofile.net/proofs/artist/468d346f-1b27-4823-90ce-8f942ef75b91.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 0x74d2fe3f1458e59c395baa790bc9fc1874850134d41209af151953e2c61f7330. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:09Z), 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/QZTB72256272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e485d9a164ce5a08a84f442fe7c45e2094adac702fa16e9096f4fd207544b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTB72256273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c44055c1482fc8be198ddbb5362e42cefd64cb082f53526b4e73d9eba71aea. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTB72256275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d9f7c8aa50de6aa5c9cee245688b735dcb8ac8989306019462d51a43f38588. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB72256276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28c790903766b7eefc7142deb75682fe62e9775a9e4e9f3fa8a307e58f92f5. 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/QZTB72256277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a73629d4f93f7759252972821f8d2428df153dabd236fe853d2652c11e3b0d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB72256278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e6db8c224ae7fc28b072f4163996a98282ce87317558c24ca911fa0399185f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:18:12Z), 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/QZTB72256279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4969a76903e31e20340d065d58ab580f597380778380e9a857e0b7a8111aae. 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/QZTB72256280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb13c6710adfe4722b731beb7e020e8e22ddef8c28a127743e00eb46e68025f3. 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/QZTB72256281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f3076f8da70936b6fc59dde5bb6fa0b1bb264245cc4b9b5393bfd28feca9f8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB72256282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc83eb6e4749a73796e2bc3a48bbde703ae9e9cc14cda75c9efbf71abb83f55. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZFYX2365631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaef528f7e7e10db5efc84f989dfbcb55ef3d0e15b74e4937a8871eaae6ecbe5. 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/QZFYX2365632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac71d8239461eb51d283ef00bba2288ca9f1be6b28a043781124803936b5a1b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYX2365634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ca6bf836ccc8d73b32e13206c7d80c698467f747814c3bf9e31a925086ab1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFYX2365636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd949f327c088a51f39143859cb5bc40addca6f46030050df2178f8d17f466e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZFYX2365637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e3c0885638a22e996d92cf6734131accc3400acd3731f1b1336905f461c2cf. 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/QZFYX2365638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5192db08ff6f5e0964e60683e30655da52e9f7f2d7a16150bff483c03be040a. 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/QZZ8A2414691.