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 0x5e8dd3ed155523debfe3386e7a29a65049a810188bc2e29bb6cf7772da88a2bb. 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/27e14a7b-8942-4ae3-b4ef-dcb9d99c6041.json and https://artists.proofprofile.net/proofs/artist/27e14a7b-8942-4ae3-b4ef-dcb9d99c6041.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2045a386b2ad5e2ec2cb0d66dad7090607da586c94300f2abf186167501ddc42. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/INA6W2201048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756858030648ceb8f3fac0028741948416929b85d06402cb4e91128f5fc821f5. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ING212498183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4da2b9d2a8178d7c562abc7d03d6a84a0b94080e620809f0b2d44ba5a67c0a. 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/INA6W2200934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf54fbe862a716ff5143d3b1b78d768b48a1ca9264935a190dec2fa91f178333. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INA6W2201116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3949f88bfdda0c5a1107cb7eea561c1e060508dff7bce748304dec5a72657b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INA6W2201104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cfc160513d397a806f6c05cc28b8bdf00349f7557c102c7fbdf7778f631060. 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/INA6W2201085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd69e57032b8a200993f18875aa186992f3b643d2493f869828957e815c153e. 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/INL412405939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c55263b4b340d2cf39543151d7b5118a37a50b3577d060cdbbee1b9ace5ea. 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/INA6W2200872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaa54e31cde34d150f912680d24eff6b6c3b2c9e32faa5b4c40d5494c923b98. 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/INA6W2200834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235bcd248716755ed7636acbe6afad6b06bc86554a9bb42e61e9c2eb583830fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ING212480877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb3f628c38ef05d93bb6974d3b84ad3ae7cbb97b14a6854b01cb20e64df8668. 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/INA6W7220086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead16b0f9ddcdba5baa77a0b45194b4fce58c718d32cde474b380d1e138b06ea. 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/INA6W7220082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ff24d2eb660200d6929137c67da5625531055abedf81e5744aca8798683948. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INL412402675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77890828452a2dfbbd2450d4c79139bc62c0be83c6b28817c0e7efd82eba9a9. 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/INA6W2200677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa205abc0f0aef2d867a800c08ba692b491d0f0c443cdcf1d0976c19d32c9ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INA6W2200543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480a8ce5ebbc35e6df379c40050a7d9609b211b9a0679d35b968d4d71c067bc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INA6W2200517.