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 0x38ac4d5cdd150b28af40fa824c00c5e010fbecc8893aa852b7d133c6899427dd. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a41cf41-ec0d-438f-87d8-f0fce89640f1.json and https://artists.proofprofile.net/proofs/artist/9a41cf41-ec0d-438f-87d8-f0fce89640f1.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 0xc0fe106dfa4eb64a2a83422c24b9ae9718deb49f6018aae60ce5924c1b5652d3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZGLM2435622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7497267d96194bedc492b29e8c6c7574f5214a081dfdbb9646a7b33926518c9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLM2435623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d14628bc567cd77bf97b81947542474e6a3eeb19f5443fc2fae29799c8f4c1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2435625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62340577a8161955082467212825fc577449943d6e20aaf7266cc8a34c6d2337. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:04Z), 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/QZGLM2435626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff7ec113f35df366d23088371091adab704a391126364afc89e813e53223e79. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZGLM2435627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7e975d6d05502e9043f08fc6c6d36cf77410cbf1974b22f933a07f2ce8df60. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJW2452839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb909906d8cc9a33d1c66a95ad76682f874712b9de79bbae6b9237e26ae7a844d. 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/QZW9M2407108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f39977c5b771b10cbc24bbdcfa3e97655d09a3ef2840d7a529a2f99fb7bd38. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZAMM2220273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21ceda2451c399c054388f76eb81424f5695c9891a0215408b4508eea2e8f01. 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/QZNJY2553549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ace57f4d203812492cbb5a3eeb28d51135bb10e9959cb21eb2472efb3c614. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:56Z), 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/QZNJZ2565665.