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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 0x45022ee2b0a14cd2a3c069fded3ac8688c8ac1178b2719d1c5aa820ae4e781ed. 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/1a95c277-0d6b-434a-8e97-57d6c7a74c59.json and https://artists.proofprofile.net/proofs/artist/1a95c277-0d6b-434a-8e97-57d6c7a74c59.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 0xeab8618eb29c3ac37e795b4183721ec2b6d6d4adaf58ed2afe21fe572afa84db. 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/JPS801958609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bb31102f92854537a6f9f61d25dfe9047b7d30c910004b8c3363a91178876b. 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/JPS801958610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f62f38f336f53e8314205ea7b5096bd51174b7d575a2d63a33ca9cdb902bb6. 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/JPS801958611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612999d662b221ebf62a57eec78a52c2a96d61a06a3c6a198ed2ca9fe8dd5523. 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/JPS801958612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f22363050d8b339384dcda251c3627fc6ad77d94b9d5f0892580ed31e632672. 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/JPS801958613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6848905aeef9dafccdf5beb73701a3d69546043ced1d36e0bdb001e6130f3882. 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/JPS801958614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4724b239a3b801e2d49c319fc865a6f7c0aed0ad5585b896efc23e259c525844. 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/JPS801958615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0a1b8dca50d1e3e2773de40e324bdffd4646e5909154e5ef8fbe30c41bdf3b. 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/JPS801958616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c26e62d737e036f75779cdbf02cf28b554f8b28fbaa9428b35f19375a03d88. 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/JPS801958617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52413df9b359b94d48228efed0821417020367f50f91c2283961caadfd0cf4fb. 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/JPS801958618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d0b3e7d055f00b870c0734a8e1cd89b277bffc9044af49ca5bd96edf5c14c. 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/JPS801958619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccc2cdb3a5447339929e39d20dc61d9d8722c88c2689243fe32a43724f264dc. 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/JPS802352719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90db4369255a356e9fdc0c09bf868e988151fd405807e3080f8ccf42a6fa91c1. 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/JPS802352720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cc5498ed48b502c07b513372dc76cfb310d25a8033c697eaf9f2b9a948bd38. 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/JPS801963806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd1b7c51cc3ea3aaa5ff92d3e34eb3ee2d58e5554b70a8052e41581345908b. 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/JPS801963807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35742afb0c2fa717e758541618c522481efdea2e8ba47bd54bc6f0d1b1e3f5d. 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/JPS801963808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf762a8c5e96c0ac01089de145e21bcc145d10d4884f4ffff81cd79465920c7e2. 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/JPS801959009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbb7c6dac39f84374bd56e3662d0db9bd7fec770a8661c87da95b589f85a922. 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/JPS801959010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf7ae19da967524101cf50eda81cb1c8ad0ffb5e65aec93ee8fd226b647ef49. 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/JPS801959011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c6a3d994943c02128eda13424141b8b968cf47d6d679d3796dcfeb045e760. 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/JPS801959012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350e669e74471da947d805802c8356232e86328d7e2482d79765e8049595a37d. 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/JPS801958623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd6410c4170c8c1015b972ddbfda471b03240a617ee525306f0bd060741e2d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPS801958624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612999d662b221ebf62a57eec78a52c2a96d61a06a3c6a198ed2ca9fe8dd5523. 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/JPS801958612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed4ad0051544edd73619f0255c39599bf53099322c3d8bcd816e03aacfbc8fc. 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/JPS801958620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9565f696d5ef44b934a92a32652a8d0114e86e9be1e4f0c378a73ea8b6ec954. 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/JPS801958621.