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 0xff7b31b745c97b3e8d7d34b8141d89fda8ca0e5a19b55537338f44e288ea5373. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b922158d-acde-4b00-8144-618de2b0e01a.json and https://artists.proofprofile.net/proofs/artist/b922158d-acde-4b00-8144-618de2b0e01a.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 0x264bf0e8b53a521c448017e098ba7dd1e549262e0a7459ed2c208432c30d3ce5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFX2531640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c90f8e572beacd0af97f0b2c206a0da482a8bba9cb7e4e320387984980fa9a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7M2513762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ada5eb0618b193a7d8a0c0be2b27f0b24b2e7fd98e51baa6fec6d68271307c3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7Q2561316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c36f0b136487277c093dc81a6509ee137d53f617e75574e8510694b56f8e37c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7S2518132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c4934502fc86f97c272de8cfa90cb354aa1a2fd4848fbf65941b54e59303d8. 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/QZZ7T2599031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f831a28241e01fd59e69fe0c2496ac7afebbea862f7eff4dc7446009f9dfb4b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7T2596364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddad366576c17aa208c51a29fd7e81feaf635f2d3ee8e0ea726aabfcad143fc9. 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/QZZ7U2553826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008fbb5814ed4b28af02616ae74f9e9fdba8e423c722e8e34a7cfac724deec9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:33:26Z), 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/QZZ7Q2536160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f4ccb15b4328336e7efad2a122b4a915fab7b0ed18b374a15880095438fa9. 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/QZZ7T2573277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04accd23344f04167a89432bfe69787b9b2ba32f2462c7c0bad02325b05ffa35. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7Q2528155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d93ae9073d85525fc4b7887ca0ae9f8110c9dfcb7a92af5149984ca8ada50f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:42Z), 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/QT3F52593351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3346be0fefa6d7cce2efaeef48d6af4e28da2af921c79c9d9d1376b1b691a1c6. 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/QT3FA2529182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f038457bdbd7644ff4d9a91874dbc4b11d97e4049caddaf25f42f8ca356efc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F72525998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03bae71d8ba140c5cac633cb9ef6353e053d48254fa2c9d42545ba040be8f0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:08Z), 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/QT6ED2586767.