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 0x18fca4a3dd13a7d02d3cb33d43913cb8cefdd85650144907478f52b323529eec. 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/0e8bc96b-a85b-4611-a136-b18f2b0a6d01.json and https://artists.proofprofile.net/proofs/artist/0e8bc96b-a85b-4611-a136-b18f2b0a6d01.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 0x4da6333b34b42285da90e8cbf3eaa3813d16bc299950191d275f8f81d05ddf5e. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QMEZE1712132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b370562d177851fec7de5beded4d28671d40a8c4f49467caa6f8273e030b8c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMEZE1733527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66febbdab61592969bd38d4ed4feb1bfa59f0721a8072f3bd84b3db309d662d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMEZE1805934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc738e197755e1b893f039c414f31dfef814c07defe8c032ed876b6b39896cbaf. 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/QMEZE1811096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff94cd165557cd498152e84eed5dfd2855154344f959135ada54a9a7990761. 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/QMEZE1847621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5403bbe9378b30341215108412d7aff8f944c55344d6dedb4dfece6f0d624b. 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/TCAFP2197742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f36d0596ef5d58799b43f68d7b1fb9aed06339d89ec0f753d49cc07b102ca26. 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/TCAFB2011343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db1a806d2736959d2a3d617a51b2bf67c1f2093ac10d9e4a617976e4e62e218. 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/TCAFF2051613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13613ce42a7793d8447bdf3edea32bf56dcce8091201e49adb1d0938c03407b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFQ2193621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff94cd165557cd498152e84eed5dfd2855154344f959135ada54a9a7990761. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMEZE1847621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda161963c1c87638b2474f5acd567e9cb7e2b8c1e5a62c52ed234c69ae938b1e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFJ2116452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631c2e90e9e86d5ec4ed28018e3b15f14505eaf688423a4250b313a936ad8ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEU2062031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049a9904a744d42d7b425ab1c4b26089ed5c74c8dda5bb86984c4ecbabe9e4db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMEZE1723012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b370562d177851fec7de5beded4d28671d40a8c4f49467caa6f8273e030b8c0. 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/QMEZE1733527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66febbdab61592969bd38d4ed4feb1bfa59f0721a8072f3bd84b3db309d662d. 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/QMEZE1805934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503cbf5844a91e17f85a2c76f06c025fecbfb4d49284c015d73e2e007c7534a2. 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/QZZ7N2489193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f1f7852fc907bd93f8dfc7224ef358a3ed3fdad26a7abf3ea90095ba086fee. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT3EZ2466185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c81b09bd778bb86bfb0a95da3bd681a2a3fda484a586c3addaf4755a968d178. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:17Z), 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/QT3FD2577867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1425d4248c94336248a415b75227b5d70c18c7882eb007e177ef02122d160b4. 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/TCADS1839452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375634cb0dac9956db47fc8108dc5bdcd1afbbbb7de2d480045d50c616be2f2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADY1891627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488bcf5dbe76986deacdd836b5aa0711b4b21df2b763136dbd6a81d8e2cea8bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEM1954729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc635cb0761c28dd0cb3ba3297d69dc124e53d6b5acda2b3170d5bfbd4f55269f. 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/TCAEM1954736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cf827d4aef6f14dc44d74db3a68a6f26162a05fafd2f3e995f5ba6f7146319. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEM1954719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535320f47d0909a7ce76489054dfaba1bc719caf8371a74ec9c0c23b1d960866. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAEM1954699.