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 0x342bf51f89f67aae0ce9ce3c4238ca79997164d74cb4da42a4499f3a6441f03f. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/810d6ec5-96ac-4ac6-85f1-dd95b837dbc5.json and https://artists.proofprofile.net/proofs/artist/810d6ec5-96ac-4ac6-85f1-dd95b837dbc5.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 0xe2515e829a6e80ba73d8c2bf5b1dd8998c2c66e405831dd7309f50edcc57d0ad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAX2330503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a419d79733b9cbcc3526c5cf4df5fed5554f6924fc3326b349132a80aca2cd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBF2311281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c4a81c380267c0403adce22ff1956cb98c4d34aebe5e6a14f85f3834e3452d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:42Z), 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/QZRP42410842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eaf7452a84c3086bd7a7905cfdf050da409e869575f846dc07c167ab6b5bfb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAS2442097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90965ad0bb35aafffe3828ddcd183fbcdce189696c3055104c65dd8fceddaa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:59:08Z), 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/QZTBC2450857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82829e177bfd0379c1ac88e15d154d5096f5407d213477dc809a166b2653a78d. 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/QZWFR2478445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe878b87fab05dec648885a49bc8e4ef2229794b1cd429d8847a5aa750b3c2fdf. 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/QZZ792405697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb05dcaa974e86c8a276722f7c3a1f8328b3b64fa0db96cd81339e09a9226411. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EX2415058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9679bb67b1b61e7cb6de1a77bd7bd2ba7288bc9b98dc0b3e75f4a6977289cf. 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/QZK6L2538681.