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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9038b3f3171fa675b7360a11d752d4041f230c652882c1b6db3ce188079d0bb9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1a4053a-3071-4f02-baf5-4d2c411ac16b.json and https://artists.proofprofile.net/proofs/artist/e1a4053a-3071-4f02-baf5-4d2c411ac16b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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Maples, Ash, and Oaks: Cedars Instrumentals
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b545f12fd19a4d685925cf152195c0bbb1fe65dfaf9f5604a23c7d3dff83b. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:06:34Z), 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/USY6C2135201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fef67072cddf86c852fa1715bb17d168474355a1ef0953abc75b60edfe5605. 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/USY6C2135202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402863c34bfee131823d9bd18e17d05d88c38aea8d0997ed3ef043fd0bf091f1. 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/USY6C2135206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a46e17eef945d46ae966f324218caf1fbd4fc8887279cf5d9dacfdbc01958. 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/USY6C2135207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8fb4534bd59d20509d9aef2ec70a070a9da1147537d2f0871a5502092de526. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USY6C2135209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e0415c0098c10d582ab036d257151115b260c11f76bf20b8892c15d5ea180. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USY6C2135210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c3fde03e518481ff01a864fb35238868754b3dabb56340fb37ae47ad16764e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USY6C2135211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095c1269e02a7feb14491ffd0e4367aff1c5f46ba02eee52948a2ac53e5a1d5f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USY6C2135214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3391abf06de595980767083a9c88ba8f208a06b24118bc6e8e8ca1981c48a507. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USY6C2135203.
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 0x0c49e189a0ce7ee3189511a6cabfc2800387f24e6553b97fd711312a330cb171. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USY6C2135204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbde45def03987e983f8385a4c3e5e7a44ba96e35987240a4763ab5330b2e8b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USY6C2135205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0eb2269e54ca26c2c87ebc0a7194be001d4248c7c843b0100e1808d29ecd6. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USY6C2135208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2d0f927282ee12b055ca249b302e217b670a4380a481863612f36cdac11090. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USY6C2135212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b1d895cacfc058457c126c7070029ebbd1ba24ed0b7b0de4ef3b97cf077644. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USY6C2135213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e546d69fd07da2629565842778ea71318a7fbccda67cf22c5ef6f38e7a6112. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USY6C2135215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7174b98a214daf657f9ce9905e13f993b01f1164fd7c6449be1dfd7b4f2cf33b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USY6C2135101.