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 0x70157629ff651646a96f17ec5c24bade0f20b5fdd93a7ba6d62f6bc32257417b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e14e8766-5786-496a-b67c-436dd5ff003d.json and https://artists.proofprofile.net/proofs/artist/e14e8766-5786-496a-b67c-436dd5ff003d.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 0x1993c85ea49193863bc1df92e3340d4e535265b76231964e6b26f588fd1b5ef6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES82516677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65a33578cfc8607b18af6c258439f50fcbc22d8974a380d88fd671c90a3ddc8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZES82516678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe03976f43b418b871aa6a7ca59a2c9f1c61b61975d20b816d55e3193a598d7a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:48Z), 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/QZES82516679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91abc8fb89895deb22ac5616d4938e8e5864e7ad94bfa8a814032f444c120a49. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNA2542902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e567e5e657e8f950a1cb12f1638a7abec06d865a124913a90565b19dd00080. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:08Z), 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/QZHNA2542903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9373e58df63ed07b1cdf88de9f037ed8feba79db7f70c38611227cb0c56e519. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNA2542904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e79c1cf0ac2d214630e50d423512dfe44249eaa3af6db4ac7c81ef12276dc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:38Z), 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/QZMEP2570843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828315261e52c84449ca50198e18ca45a91dbab3a364bd108ff6d6488d106e6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMEP2570844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dee781035ca830705f4f44d25ad60e6b4df96c49445729530d878ebf149b02. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:32Z), 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/QZMEP2570845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69910c83f73864fb1e357341d26917d31d4b8b98b10091c8ef73f1e188c8ebb9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:33:03Z), 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/QZMEP2570846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e26faafca6bdb50a73512d7cb58f4c4914b114a50d83ad9f95a99a72f819b7. 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/QZTAS2507396.