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 0x738a2095b573bbac5be8abc4fadbf2ef6e1a529690a3571c4d385e0418ece8f1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18566f16-6513-4671-8abf-cda076a135fe.json and https://artists.proofprofile.net/proofs/artist/18566f16-6513-4671-8abf-cda076a135fe.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 0x6fc02d3f53a71959d622ff5d81afe5524d819b137df7afa124db9811bd8baf73. 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/QZNJV2240391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68abba79715e98aec431b32d2aef5b13d97251d8ab1a4c5c4d4ceb1ad27e95fd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZW9M2209701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3645edbe921826c612add63d6dff2e4958474a1d032b44c5ba46920994230ba. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/MX2832145618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184a2043b8bd7fd5d4d7611350df19a97e02d316a1e3d957acc11762299376ec. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:39:54Z), 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/MX2832255154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c7ca60a19c686f27a35a06453f4ad29218c55743c7534e28498c1d8e78d77c. 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/QZNJY2364969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9859f729cb01f0d8965c049a874eda728344b8fdce98ae67b31fff650b69f0f. 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/QZ5AB2427997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5951fe57ec79fddfc8c3bbb0758d2c624a11e0d2457d5dc9384a4572a266ecd7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTPX2386735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3413ce388b97db5ca0b2495af0f546c96e058e292f269ef4847d47d11419fd2. 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/US7VG2488549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9859f729cb01f0d8965c049a874eda728344b8fdce98ae67b31fff650b69f0f. 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/QZ5AB2427997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6caf4b29e5769f6a06df540964426d49283178ec46bba59ac6be1fc8f2e6a7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNJW2455884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aaa2b633130fe5d391949b98f2f8015ebb359cfec0ab63c33d012baf75a0c9. 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/QZTPX2465523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651fc70a5ba0568ab69167b9e3ab4a9251407c4d0a219026da3a121b315bb19. 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/QZTPX2533731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d2738f1d6777e1e05fe186bb2f32683d2dc6b822c7967596731fe401e0ba53. 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/QZTPX2516967.