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 0xd873ba42ce9102c31af5f06a01d4e14eab3fc19e6f1c56a6b8ab4e50b9c0152f. 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/8b66c410-f6a7-4e24-80aa-3672dfd774ba.json and https://artists.proofprofile.net/proofs/artist/8b66c410-f6a7-4e24-80aa-3672dfd774ba.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 0xdaeb123d9d90ccabe6a51110fa811d876a7e43fedb73341c591cf367aa0164a0. 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/DEPI82218672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45401126fb7663f86a29593a9d5791346183b3199219a986dd7535c78a5d9a22. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEPI82218699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48df5a26bf45e2083096ba39383120e8cfbc35384a19eb56a4a374bcd95fce97. 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/DEPI82218681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36c9b97ce61557266dcd980a67d61089f8398e6be477721045153345dccff71. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEPI82218677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122c3b8b08acfdc781766ba2e9f252ea192051eb550540f2f5bf2735bc4c7d8d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM7282538411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3734e73ac26feca8ba13894ffec338c50ac1a0e52f2d5067ba1cddabc5495164. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEPI82218698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8807e677125a8a96a28500f9b215ae75e0a3d098d97890ff0e5b39162d8630. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7282538508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5002a71616f4ba5a218597cafcb73ea551e3000f0b3f8a624fb3b1a56a26333e. 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/QM7282538682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ddc7b27493b93629fd48777f285ea598b1deaba19695dddcdfcce2ca250e33. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/DEPI82115622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc71132c1a13aef58e2297344164265ce5ce45a620fceca1b8d1da6c0dc25bc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM7282538717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd515803bbce5c09038f5bd0d0f66d2c75ccf28bcdb03a9e0d8d13d6ae6f00e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEPI82304454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1960e61e11f6382d355d689117a5da54da74d4be5d085d9a9dd72d6bc0213ea. 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/QM7282538730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab855b79bf434e61144be9a3c69d0f14bb67b863db5f0959df6ca00b7e55a7c. 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/DEPI82324723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d5a637305bfba349c7e9939cd7fb2aeeb993b651bd0dc42af0be7829f9aec0. 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/QM7282548674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cee77ab9f8e99a140fd578ff5ef9435a5a176212457ef42aa362c6a1d4b6f19. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEPI82326276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973bf0b01bc5dcf31b33d20da82de816da0ed2c743f7a333e79db8298fd3a056. 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/DEPI82441908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484545192b94d92aa3e6c5a17ffdfc013685600f52c337d558bee5e5d5833a7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82451815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee8d5c6ab1d17863b5d7faa4f0c1fdcd4e69711f0999616d63b4a0d15268484. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7282548737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f557e42237ce57331d9a37f0b587edfd003c398440aaba4ea7655ecbe0c00. 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/QM7282548746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd3f71cdf3444c776a4b45301c3c0c15a2d8f82202617b1c8a31aae75b8f59d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM7282592598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7e6a468b6fdc24c7c1e7686e1e454feae33e7e05159342cc193ea371fe440. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFMF2569753.