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 0xe12ebde2091651b7f8b5b1c52550a257ca86797e3de50f944e5a6437a0726200. 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/eb25d819-630e-4399-9016-7a2840bf3699.json and https://artists.proofprofile.net/proofs/artist/eb25d819-630e-4399-9016-7a2840bf3699.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 0x1801d6647d47aee8af048a72bb0f5a934ef10be9e885e573b9eebaffb41f01cd. 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/QZK6M2300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c2f30f9658ba3e60e904b63c5f6b2e0c4fbb6f1d044b2f978b49955799a9ef. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAX2366551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0519774fce05a67eaa3da96886a163845df4b71ff92328e772b2e74954c0545. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYY2441503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bbdfea157d444fb83523d61b2e6725cde36f2c780f0d30cd6aff521530a69f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZFYZ2446297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936773e506a92fa27b2a26cb34f2a135ce6ea4ba9d77c16b0ee3ffecfdfd184. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:11:22Z), 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/QZES52437636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b41819dafc0b0bc7d9f7d90d24f73f0c27db092694983164a79197c6fbe6814. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNC2442319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ecca8db2751e24c8b155fa05558dc56c0e42562c0983d7e0865cdf33e1213. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6J2479621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a69b0f4a0c1922e56e76f19763add798131938e8801b17436ba95862903b67d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:17Z), 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/QZFZ62404783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71466fd0552ba9b571fe41cea459055c81493776c5e631a3e604013c5d917dd3. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZZ7S2467953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22fb88647745e052df444f9862e88a5b62a0650d00d3ecd354b84a0abc7e70a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F32421787.