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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 0xbea0f52b0f9b51b763f9de21f5f29220c9c93dc81d8195745a81f3c8fe49e2f5. 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/de130c0a-4ddc-4b8d-8008-4485cd1a067f.json and https://artists.proofprofile.net/proofs/artist/de130c0a-4ddc-4b8d-8008-4485cd1a067f.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 0x34d99ead7eafa72cb39225e08a3ea92c94dabe5179ede7b5f86ab9a9a58115c6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEBZ70100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c6acbfc91be52a171bc181d8f73e5dc162204ce466e5f45d488b49bbf06ef. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US57M1173606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908258445ea74b3f60ee6c8fe7da7b50f1257828166461ec4c9847f36516d227. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US57M1173610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42351f3cab3d41fe1c66fea8cc39ffa56cc8f1812eef4415325ea1642ef63fee. 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/DEBZ71100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc1b527c1974840e8f6ad3a7de0ee553f26ec65315e6b36892368c8ba3c6488. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEBZ71100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6247cc081339f9ca26a3075326fb8c4549b9246942c222aa85dfda9b3a8874c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEBZ71100455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b1df9801a5b6abf5814ebef79d7450a137b333112d36bc13aac6c80183723a. 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/DEBZ71300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d36dee856aa1725948a9ef4babeee8b8acdc0974b8dded60dff3bed084c7e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEBZ71300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151dba9615d8e3861bc5c2f8e7e225ac400749b7906e209811dd6a096086d753. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEBZ71300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61717f119d652af69ccd27ca730bff1bb80aae87efb13a3c0a30a88ada70e9d2. 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/DEBZ71300512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a80c3cf14d35e5dcb4871354cb600b32416367b9c8074fd638b8e569b50db3. 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/DEBZ71300516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb4d5722f5ad9b062c53ea3be5700ed75aa226e9886a85de9524430c13e65c. 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/DEKV21802057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eed1201c7b0cd6aa53d885dad472a9289d058f169bca71d23e65296f7bd5104. 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/DEKV21802239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8575e4e35339c8c7e2c96a9f8408d8f821d5008c88824f47bda6191ebcd9e734. 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/DEBZ71600117.
Shout It Out - Take Your Ass on the Floor Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e502dbc003a75056e794982d9e82658d55bed13971ed5a4907f8ba52cd9beb. 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/DEBZ71100714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e422925271eb755b53ef38bd0cfc0868596a5d8e7b9cecfcf273c4bc216f5e3. 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/DEBZ70800102.