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 0x47585e65283c9802059bae57c704c3a5c1e61af7fa54668a01337a4f79e4b71c. 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/e5a49ef1-86d8-41b1-8110-d969d68297c0.json and https://artists.proofprofile.net/proofs/artist/e5a49ef1-86d8-41b1-8110-d969d68297c0.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 0x54652375cab25cc53a5d59166ecadb02647bf0f664ef87356f912d2428e0b195. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFK2309520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30605af9215aa81ca20615ffb8e4819bd61439fa10a0b3b27b66942470d067e1. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZWFK2309522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c0ea6247220972132283aac7422c0f99128e60d01180feea0c973b36af1637. 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/QZWFK2309523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6032b0f5f2496cff572d991016af73a5a3b569eb13b7413988c22b0f811b585. 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/QZWFK2309524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f000d5bc8ffe58136d6219b5961fc4caebdb2b40e8c74e00796b7e577e805. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFK2309525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0b5798c235d3605581eb7394dd2d7e922e4c10b0eb486e618ce3928d2f52d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFK2309526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1206a90a89f8ab55db156a47d2843f8b8a05787eeaa8a16c8af19da8c5310322. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFK2309527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19bc1acd9e87299b4bcd2eea9f872d45030b625b5c5a195cc7a481ce0d523e2. 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/QZWFK2309528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e81d6e802e42a32c55fe1d232b94abf9f6bf934d7bd4f5823a0c5809bd839bc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZWFK2309530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25b82cd90fa1ca1b33b2769971f7c3188c3b56914b73bba5fe869e99a61f481. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:16:42Z), 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/QZWFJ2377922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7b2ab933d378beefd3efe0fd84027acd23d2dd70b6acae0d13f5bd1a7f076. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZWFJ2377924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c4b5c5a57fa0177b9b67a71a3f979ada05e1a9d77cebb7a6f313fabc256006. 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/QZWFJ2377925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f7c6e9c39cc4561b9fcfee3f8d86314cd2658f46041d034945d225c2a3f85. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/QZWFJ2377926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3032ee4fd8739c472461c8967199d6952fb4d33408253d3a83a0468f95d23d67. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFJ2377927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb2731d8b57fbf7957ce3e23db73988d0a91441063840f6043937ae6879a49c. 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/QZWFJ2377928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ada1ca0ab28ff50922bfb539efb85efdb8854f090a13b72ece63dd4ba45048. 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/QZWFJ2377929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590d5490a26d0ec52ca6eb793c017b50670f6a516180ff9e521b9c3e5b592c85. 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/QZWFJ2377930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa835567503042dbd7bfb0295f1118c2b8727c515ea612f99eb0c5bb47e5213. 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/QZWFJ2377931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67303b11321688c6043f299961f99f3842689136af46b8eb48d25624a9b9804. 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/QZWFJ2377933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd859ccfc7af73ca497a79b7cbc13826806aaad4d76dfa19f471ed687d96ef7a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZWFJ2377935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a4c5d004fb88179d65ad2b5352f7acdfda9919517b871e6b0c66e76e5ddd0a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:05:42Z), 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/TCAJH2508943.