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 0xfd26ea657304c3918a649e5c041e002b19d79dae5ce7137db3368196936f1832. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a62d09f-5aef-4265-ba28-c018dae5d2ce.json and https://artists.proofprofile.net/proofs/artist/7a62d09f-5aef-4265-ba28-c018dae5d2ce.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 0xd0dba82d94f99a34158034a243d0b043090b470b0a8a56a8d74694abebd7d4d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNW72211355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14ad82b02f41ddb81bde8f18e916548539810b330ed9dac17cc7f014ff5cbee. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNW72211369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a7c6eb33e69862f23eaf5b935245dee291db9a1f9ca975f54bc2ba4c1c3825. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ESA122420684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca5952c56f9083dff9834818f9ed8b5147ba3ffcea7fbc31bb139671458f9b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ESA122420686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307ed68ea098484a53ba9d8908185ffa163c0eabee9ad124acd9cb3a1f6510fb. 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/ESA122420690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522ae98bfa3bce3e8166022e57263fcecb243e8d57899ee1cad06b8b53ee7c4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ESA122420693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa661212054f3d16c3d1cfe34c2b72ec658e7686ddbb0d5cd8ff1fdd6bef5a119. 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/ESA122420694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feec0ab8b851b9f9ac97630269980b68b21b1a6393862d658e1b6b8e2bbc669. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/ESA122420698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82573c577e39fe3bc3473b0ee783acbcde8cca0d3ed42d77361ef480af5f895f. 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/QZN882539732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26462b96c2b6efff28bae72a17b881b5a9be1ae2151b4d49af42f051d70f20a5. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZN882539733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f078b67bdb500969fb2290997d1ab00f3b68db63a15867a549078d1748edf26. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZN882539734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5134ee14d4d25e8bacd584a1532e29ec58380f29d1709ef0f86d10feeee6bf8a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882539735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f7cb18c4048859eabc74fefb55d36ef1f9881421c2ac5fd63c11604a0dc8e6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:56Z), 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/QZN882539736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7747eb7ef2859fd0f308a4d8e4b352b711b9c2a08063a966a23f785104fdedc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:12Z), 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/QZN882539737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586224301db7f9aa7db2d44ea7ed18c14e0cac42581d58b145b3d65fe27d5e43. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZN882539738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5857b88108da3e8c7c74be46091de678f877a1487e911a484f32706ab1105e29. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZN882539740.