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 0xc3f3d5ebb2b386bf80a2ae7555977b642ef47bf2f611f8a5d6eb79c6f27449a8. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5750460f-977a-493c-bcc5-fa034a4b1c90.json and https://artists.proofprofile.net/proofs/artist/5750460f-977a-493c-bcc5-fa034a4b1c90.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 0xab4d481912bf8baef7fd63cc3c35e84f5da36d6d636e6bff560ce5c7bb547736. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPP302400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c683681ba6947b1bcd7d8b2e42e68a569bdeb32db33b1165157f850908f463. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPG102300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8e68c34162bfe1b12ac407dbdb295facb5221a89d241353238c0b5de0b93f4. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/JPG102300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f3a80ee63b7b171b1f734ea4547ff44dafc9eaa8fc8d3f0dd4d1c71b41256d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f55f31a4c34e655355bf41d26cc51404ad5971a92519fadbc8e79961eba3a. 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/JPG102300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11913c26c3b5a927bacd926a53d8c0ec9fb5f4a42c768097ee2190c4f9fb928a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8e68c34162bfe1b12ac407dbdb295facb5221a89d241353238c0b5de0b93f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e05a9e27c6429dec932cd6712bc6ab021cff39a1838c7af34458e8024b5bf8e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102101534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23234f21fe8514ef5178a84b71e24a7e99fd1c597d65961fe06d469b488680a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102101535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a95d0b0a0671e05435546d8d25301ab71b92ece47e695151da9a6262f27c7a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPG102101536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408bf119d62345d2c7609beb655a3c33714b3c5cfcd52200a39be98b9f121337. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102101537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26766651b06fc5fd822ee90fd026ca2c02747785d6f4c80b0c31bbd758e539a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102101538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa973408bb63551e8ddde315dbf54ee8ab13d8d3f83f240c0353857a1dbcc5432. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102101539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98152d8253e21ba241b2a9dc73a483feacb702cdb6bf5c90534d056d9fe47f2f. 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/JPG102001048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b195d81511786fb985a2d481a88db060a96e0fa03d94e85c92e2c837fff678. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPG102001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaeb3250f257e18280a9f58377022aec14e265b644e83a52f778e1484ceda6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG102000744.