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 0xe04ec0a77f4f7da823001037aa26f5b74016d18631958c90172cdac9613aa8e2. 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/9f343e36-56d2-4e68-9ffd-cee0b87e3115.json and https://artists.proofprofile.net/proofs/artist/9f343e36-56d2-4e68-9ffd-cee0b87e3115.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 0xf4f6a110860bba94985d0d3fea7485cb771ad2fccaecc7187c21e17ac009f731. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACK1566461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd77bdc54d58a77733f4169e071bf4f6774f54dab21c0a55935ba5b2f2e51ec. 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/TCACK1566463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87ba3d2d08fc9f1aa00a2113e0dc38ea022c5324aff0b443f10ae2201e5031d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACK1566469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887adbafcaa2a2a9a23766d419d2023a1bfbd24423bea874632c1090c687bd00. 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/TCACK1566470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f175f7aa387bf831c255eed0ae2f9958145f955f4c81a6dc88e6712b9c3a4. 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/TCACJ1547220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7a053e011a6dac7a5574528e3667608b7f206c1597f640ce0a1ef73347594. 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/TCACK1566497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc934dd0771a46166d5837a0030df9a8fa829dcd186eb7f87034950e4aade2a25. 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/TCACK1566498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd6c5b38bb24eb035fbbb79d684bafbf2b4349201afc974feea949a00300793. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCACC1479485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b0e14d3fa078409e370367f3b007ff3276e618f5cc974342b6ca3bb7afdfc8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCACK1566500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad998dd6bd5ecd634596227d9bf0ffe9e791a422e9033927102da0e7e73433b3. 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/TCACK1566499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c51c5fdb096710ee61a47c0b7ae05c5282808aa4a684562dbe91ad4f08f481. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCADW1809502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae6febda4a564c8c4c78881751261cd6db646183be84eb12e5ea2fc5df89300. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCADW1809499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe26dd81b17fd013f28cfa9e2077e27db5fff04d24148aff1e3755cc6cdf27b. 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/TCADW1809501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c51c5fdb096710ee61a47c0b7ae05c5282808aa4a684562dbe91ad4f08f481. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCADW1809502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31403b4444dd6be94cf5d6cef2e8979f17e66ee3f45a02ecc0d433d219109368. 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/TCADH1717589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44010fe3ad84346c24a767fedd8c0307bda735dbcb0886e08218d327a08b8939. 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/TCACZ1794083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f175f7aa387bf831c255eed0ae2f9958145f955f4c81a6dc88e6712b9c3a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACJ1547220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd6c5b38bb24eb035fbbb79d684bafbf2b4349201afc974feea949a00300793. 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/TCACC1479485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c861dc68ba60045bf7d5b5132c953ddbe88989fec6fddf21ac58f2e8928c5. 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/TCABT1456036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e05e3354b23085e6e735579f7a3bf58ac6b1014f5e6b58e18dc837cd92760. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACA1477797.