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 0x959a308c447240e876dffcbf5d841b4e4b734cd9fb215688f3f86f42d1e37c58. 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/2b09d591-5a07-42be-ae40-2606c212ecd5.json and https://artists.proofprofile.net/proofs/artist/2b09d591-5a07-42be-ae40-2606c212ecd5.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 0xaac5a6c6d18f9ccbb0d3ab71ad381eb82abd1476c73317032e29972c7ee1fd56. 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/PLUM72200589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae1b98bb51c0286e9fc742a095c4e2e87bba488cc26b10383110fa6e4e2473. 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/PLUM72200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815db2d4fd008131b37b560bf89763d01afcc49c100cc3ef36875e44bc5e1686. 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/PLUM72200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e0bf84c80b745a2f0655eaf780935db3866bc1fe48c8aba48b7f86c48b0d6. 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/PLUM72200963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d30ebe5227d5bcdc7479938ad8829f47e22e4c51e403a26d16ad5f810f9503. 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/PLUM72200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c97ae7a516179c2862184307f83a455d24d83488fff803373d7c324f5cda0d. 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/PLUM72200299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f818f437363d65d34670ee9199dd910d5edcd0c79054c4a4a71e70f6d11a6ec. 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/BET672200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925c1353c9120979ad494c4f865d5ef6d334648212da03b8476ebc7b55f999e6. 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/FR9KQ2200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1db3c2532535cafe7c73a645c437199f18cd933e3cac58f2781c4fe79aa7e03. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USUM72205464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7e8579384c2b748e636ef80656c8d771c92afe1ebe10121059b7dfce8c900. 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/USUG12202494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac5a6c6d18f9ccbb0d3ab71ad381eb82abd1476c73317032e29972c7ee1fd56. 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/PLUM72200589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac2d2f7f1e1defa510419077d0b91bb6c6ba41e1de7652766bd9c85d728a960. 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/FRDZ22200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474c45f87f13ffc70cd036469288ba016fd0ea557e0bc5c729b20d790cdad0e2. 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/FRUM72201831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf220e9adaaf46fa73358eaf1dc8152236013151189530f61440c382fb03199. 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/FR9W12145749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabaa228684e708b075855224bd76cabca751b7436ba9a1a18fc5bead5c7a826. 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/FRUM72101251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a416b5032e045cacf9424b5b1f9ca24ce79f13059b657b3def615dbbfc260ba. 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/FR8R62200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4bd20ec558d5c34ded3256568ed7a5ac0aaf55910b40c455966ba1dbcb4044. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USUM72215262.