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 0x3a14c9bf0f50583bc538a0127b287259dfb0a25a747c3124c467bdab17522c77. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22125b52-a8ec-4898-be91-53cf7877f279.json and https://artists.proofprofile.net/proofs/artist/22125b52-a8ec-4898-be91-53cf7877f279.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 0x44fd95c684ee7d2fb5a7a68f9c4c9eaa24d1a71e35092572ef4dfaafcc31b631. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42546821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781526bb0ca5a05c9ae6ae15e854889b3c4fdb71c981365ac776f7180443d38. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:15Z), 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/QZK6J2556531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4bc13dc30e24431ee2ddf574ba77b455ec80a41914503d32b5a9b375679dfa. 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/QZZ782455322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc69f7b4b00f820d72369dbc833ffd56df41c8a41993bc2113415b510964f478. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFL2472152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3345190ce4475fb26973ccf66b85c6595ee6302a2558ec54fffe6490d144b953. 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/QZWFL2472154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053e60053e737fe99df95b517bccdda357ecd312b532129e287fc33dea324f38. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZWFL2472155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd4b246d29863f2455703f319d08bc70a4f720eff9f7c89fadbc6a63f0ea155. 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/QZWFL2472156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c8d1a588226218c982913aa63e1404e6c5fd5be12d7c96d25bba78b1d9ba96. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFL2472157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df096fcf59d06588df999015510136cc5b3068dce94b06f2df2ada495de547c. 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/QZWFL2472158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0fcc28b371ca82e54703db74d401d7c9189aa8e1520680bfbbef724c0ff7a4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:28Z), 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/QZWFL2472159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fd95c684ee7d2fb5a7a68f9c4c9eaa24d1a71e35092572ef4dfaafcc31b631. 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/QZDA42546821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff907528444c7788d4446c13f0d81ac33be02dedb0bb919f30370736debd88c5. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZWFL2472162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07475e9979f68547395ea53de3bd94996ca746d94de9c967179bc1f0506107f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFL2472163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59bdb4c7e88a9c0db57a0ecefdca3b254573b91efdba10605143baea4a30fd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ782445984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9ef6b18c94cfccb3cc483adecfe33c7bd58055e8806772c174523b1dd58c44. 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/QZNWT2587467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cf933e852388f70655a3859097b4be2d9c518ed1b0c3e5cca8d65c1a99a9b8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWT2587473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2917149c99485d036386c21369ff6d470f204804b64af8aafa93aa245708e11a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWT2587474.