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 0x2897d10f9b44dd8a940114817c36e20926bc01209378baa8016e2d80375845c0. 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/d7f17c94-20df-4c19-93ab-f870a490f03b.json and https://artists.proofprofile.net/proofs/artist/d7f17c94-20df-4c19-93ab-f870a490f03b.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 0xfb1c276b620e5ccc4fe308f566597cf59aba8ddd8a2d6dd48358f8456d3f555d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2402442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd291e604a0008bdbaa0c9686a9e91f51c96a099c413745e9fb23351bf3944b48. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92273173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6a659a643886b1f27830e6a8dd5dac5daa1caa39902f882d8a89e70420095c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2310302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aaeb47c1518e92f3e34db050ad3cb2e88fc2715acf6d61a2ad7bb83fe580ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES47E2007426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd291e604a0008bdbaa0c9686a9e91f51c96a099c413745e9fb23351bf3944b48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMBZ92273173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f70c85556dc889d8b384580a427b306bdd915685ca91b06fdfe0f7af4e06a94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZZOPM2237036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a32213adf7f20cbe1d7427b099ce21d759be014f769acf96d75d268c89b16c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62103059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa664e9305b1db2d9666a5b29fec840fc13432f87140f5a16d8e831602ec16476. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2407507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c327f5b64dccf2b5d8811199f800b543aae402e11b5c11ef2cba0eca740ab8a. 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/QZK6L2188111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98070148c751d304acb4765071b695f4619a854e69f935ca3997e431ea7b2151. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2307948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89d811fc21f340e20f90256adafac84c80245f840d19ad67dfc186b1fcdd2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES75E2301973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c1f5b450619c1950874f1814790a15513a65af697875d80cf5f6e76bcef93e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa570897194e6d762937b8a9cd24aa4aee8823c608e1e559810ae66f914bac4fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA72481386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f591cf39b330d67efca7208956eaf9b5278badcc534bea474671980cdefa4c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2510557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7396a0e3503cd5f296b1cdb2eccded1f1b1b0667fe35c3f7617137ee06be5b98. 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/BK4DA2426804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8696b67bee55adde7b9b1ed80046171414ca955782440a75888141b5b5115c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6Q2153518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714847c99f6469a84bf043ecf74d15b3e1810156d621eced7d73ae5e6c070d43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6H2084341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0112280a8946d249a64dc511c136560f7053f277f7c9ee221f8283412be18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZZOPM2237003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a846e169dd5f8b8c5b21cb098247283030731856d0fd7398ead45fc3eb4ad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLFP2327933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a846e169dd5f8b8c5b21cb098247283030731856d0fd7398ead45fc3eb4ad. 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/GBLFP2327933.