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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0814491e631b6feff168a88ed0288ce216a36ee60d18bdd1b6a3244b4449e8fb. 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/fb0f656d-41a2-4bac-aea0-f31cdc168b78.json and https://artists.proofprofile.net/proofs/artist/fb0f656d-41a2-4bac-aea0-f31cdc168b78.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a181f0a12643092d5253f08aa6a6fd0564b975cb8c6799f277c4f62d2008a8. 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/QZDA42428958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e990e36ab15ed841aeee66067091d17d0d202ca6f1d28531b1f82457af25f. 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/QZDA42428959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd887d1d258f1b3d90fd8bdb08d3dc098fe362cfd46f12a4ddc9f011719ec544. 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/QZDA42428961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97215eb2294b75fcc59d8bdf885080611a350af91533b2865c39d5fb0cb8245b. 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/QZDA42428962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6f84f1f20fe01c1486d8e4c385e67ce21aed386b07d709756005e3ce6eaea. 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/QZDA42428964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce90a1caa96f02f1599a7942c3fd0052bd9bc979d94936af51bf6a4f1ee27e1. 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/QZDA42428965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4a906ab25e9ec2084dd10cf87017bbd7a5895d675446aa260c28c0160adce. 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/QZDA42428976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42ba9f4b0452e64f063763d7cc8df0db9157e2e151d1dc6c774b07756c2b6d4. 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/QZDA42428986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf265f1df0366b7734d4c10d9d07eaa41e11e6e1ac9d82dc252f9f04729c4f2. 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/QZWFH2308339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565e13397e5e8b5c91113373c3c3828d8a83bd9be20f6ff5bd4be11f6e86c4d1. 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/QZWFH2308342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22665ec6a4a99153497849d4fa0c300de00521b3f510dc2f2fcded6a58c5a359. 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/QZWFH2308343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00b71187bc9df080f0b980785cbdb76d44f3803d280f2bee7ac9da99192d03. 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/QZWFH2308345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87633448caacd9c5bd69030211949974a4881abe99ba81c316bae4e46333b8b0. 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/QZNWS2362418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa193a84277474549e591502f850caa597795442ead227dca36157ee838408b66. 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/QZNWS2362419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e7c8d5c68c67c89f63907b41e5d24e43ba4ff5c6b82e3935385ada26e1f0ca. 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/QZNWS2362423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d71c968a2946136e27094262376824c10d99f2910f31723a0bed59f1ad7968c. 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/QZNWS2362426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815eef994abdde3fd4ddf316edcc2a903d6580cf900623cdaa082712e087535a. 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/QZNWS2362427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d50b7dfd7085ed592bf872d303890c93345ee0182c9f068844114fc3d15789. 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/QZNWS2362429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa746ac5c3e26ae9adc82bcb4b04c631a8ed0df450412ad2f6a2e4daa2407664c. 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/QZNWS2362435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71a2fe75a198e84252ae14cf87c6e4177f6ea2c861e0903d558c9440b9cfb9. 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/QZNWY2416655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93302a5b34376f5d60ccfed20b22da265b4810fb8badfe986ef6217f35a4c8c0. 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/QZNWY2186993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca1fd14bbe683ceb047b6d00e4e421776000b85eaffb6b2953839eb226a4a7f. 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/QZTB62242165.