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 0xd1159191f0a5f227bf68b997404cd45eafd87d556fc9e242083c03b04f081352. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/284f2bc3-ba41-431d-992b-a9cd68b1049f.json and https://artists.proofprofile.net/proofs/artist/284f2bc3-ba41-431d-992b-a9cd68b1049f.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 0x773939bc1f6befe683de9203688845768492bd4d8cdd43ae3e5dd3e5c393de06. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJZ2571782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c1921ac9ea1b6339d29f2bdad5fbd97182c1cd03e4ba4d69165f96d90d60c5. 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/QZNJZ2571783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983504173c3b95d974a7223883c0036700eedfbe33e077f1e150e1a2007d6d0c. 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/QZNJZ2571786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3466a10de4a1ad3f2a080bf2d28b977c7a0112d617c21ee070e0352cb49ca7. 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/QZNJZ2571802.
Fat Flava Music Presenta: Special Xmas, Vol.6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c35afbd202db2ad3595595896e1eeb0daeca573c9ffc0076d4caa194da23855. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/CLUZ21800706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea9c5bfa08f25c78527468761c0c46580cd9a2e1f71ea102712f45d40fcfa66. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9M2282744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5573a8c28977807b8076ccc00340c690666466c4d87d2d0cabb10c96b58d15cd. 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/QZW9M2282747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e64668f1c1dd3bbde3097cfd858b9d3aeefec1fa8d7a6c5fc2fe41a26e39e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9M2282751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c689397d184b6df8f6866b6dee43406ee9292c7df23017f222d75ebcca1445. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9M2282752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775fe6f07263733f36bb5a734796e2eff787bc8de42fdc539fde312835c6fa33. 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/QZW9M2282753.