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 0x36996fad765cdfe907a3443bfa1a8a410c418c067767fee0fc64f0fe4533d3ed. 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/d1166199-174f-4cc8-a04b-66f11b1a20b4.json and https://artists.proofprofile.net/proofs/artist/d1166199-174f-4cc8-a04b-66f11b1a20b4.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 0x00427daeef9002f629919b771f494f07cc86346b69f10a8ce2ebcc29702c0b70. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USX9P1162481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f83b35b0f676589530ebf3868250f73e632664ebe776dfe0199d85f9c15b0b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USX9P1162484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc184c3ff9fe594f0a82ec5dea783222ac7749c17bf130c31b970a53053e92543. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USX9P1162485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26775f93802a645c9c91bf9dded29583a80ed5a1cd5f44fd25001d3465a95334. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USX9P1162487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e72147501a286ffd2385c0e45a3a0177177eb58e84d8d6265341be17d026794. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USX9P1162465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e63b3b18547891e47cfbfda3f9bc5cc302161a5ee853e7832cde6ba20c0bfd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USX9P1162466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3219338310c02863b214ad30b3d82568273f79cc410f75fcd17f951a0dab29. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USX9P1162471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b33a08bbbacf42d63d36eaf40e5451b64eb16ffaca8dbb638cac95408c487d. 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/USX9P1162473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2b01ad756014eea7b2ba8e5e6acd5445a12fabfbbb944d799e9ac3b0ed577. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM82156528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0d19877b658ecaccec300b2c08d0224433547a370628ff1512d7df69e3fab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM82156531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2e9d56820f058f9baa063c6c2d1ea45ff9226af7ff688c8ad25918c75377c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM82156532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94653ec5c054e7fbfdd6a94f38366246b23010dbb3dadb059413e1e36667776c. 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/USHM82156535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a162ca6c3bb899845d183051bbb6f1b04650999643e52e95962c9961ff17793. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM9AA1581547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755e7409e2852e24e875ab5c7963863d37c564dae6d4afe0a041aa9e026321b. 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/QM9AA1581548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfba0fcd59a3eff25b3b07d0840985efcdc43e9f07d40a7639d6e19ba9b7ce4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM9AA1581549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b950d7397802f33c5fbd9895ab3e9802ea44d3c08acfb7d9333dafe3e2ac05. 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/QM9AA1581555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d52cb017a95cc2332b734b98dbfd5ba15d79936f6d276a71bc879ed36252e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM82165687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabc1ba4f3fd54b71a735ebcd82966a1df526124b554b1a05e0f865c88f2cb9a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USHM92407167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673b1b6b2d3462609163097665a133583ede4c24f3c71556c87c0c97cb8924b2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USHM92407171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d1f5babd08bac98b2973cdb6c619b92401ea66639cb43a9af11e2db891605. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM92407173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c5401cea442a6acdfc9d0476f3d5cbdf7bb0332db29788b70b4f3ebcb7a538. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM92407174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1956eb3d136be3f8c8f27e2d34951483e94830dcc23eeddcaf566f1b8c7c986d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM92407175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf429739d15699fe3c4365c6a31fb4273b801d192ffc71e1aee58bd5df403e513. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM92407176.