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 0xa33706ca10c60d83d1f5fb6f0bf5bbba4acd052c5e504c9e76024a46c1a9a5c6. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf7d62c9-c278-4ee4-91c5-a17f08541507.json and https://artists.proofprofile.net/proofs/artist/bf7d62c9-c278-4ee4-91c5-a17f08541507.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 0x89c7afbc0c4f6d9d780bcb92141d535534b4417d5ef9e858dd00748f6efe2798. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAW2411202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9f32fb4f74d7fe54478ec1d03ec9b040c61d9b5f5362c90b41ffb1dc5691ae. 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/QZTAW2411203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33fa28f0a08fbaa07b0670450184510c8bc303b306027adca284709007b6961. 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/QZTAW2411204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df6129f6febffd8fa935b48243fb7ca5e6269c22e41b6c1b8eecba518a55f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAW2411205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f687011576bf38ed3f0c45eef8cf95507d7e761bc2776ebe9b2a06c3f5291f6. 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/QZTAW2411206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0a72a7832621da8532c7f3a0ec5948cd91c2eaccd8e2c18d245bf407c44e8c. 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/QZTAW2411207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10eceb4cfa4b6a581ef7b8384432ad5765dfa2456f5bc9ce9000a570429e708. 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/QZTAW2411208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edc0b626858a1e7696a715e867da5c449ba4096808cb13b7c462fbd0e49e6be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAW2411209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1dda1a4f4d29f8d2bba01e1716f1489392d97735550c31316b4cae998f99d7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:54:16Z), 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/QZTAW2411210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ad7528a426f333381c0e2d82c158a44f0a8b98fe73df3a4b5efd98ee7a458a. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZTAW2411211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2182d35c4ec81de4a742d64979d78f22610cfea19204e4696f0b94e30f3b001d. 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/QZTAW2411212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2893435a4fc7f799dd32bdbe830a8ab0df2e95c2056a72ecce078d3d4545427. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB62387187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed961e9718d285dd47af60e886a4ab9d650f51bd9c71ec0a1d99f7f8614ca9. 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/QZTB62387188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1173c1c3cf7db23f3e57d09437cbaa0c7e2e959495060db4260ff1b26c2273e7. 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/QZTB62387191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ff5583606290cbf4c17504622b6fd30925b77275877b466eab254038858c15. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTB62387185.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fcec0e2b424f5475b3a88a45a72caafa203f197449d0e2efefc9761902718c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTB62387186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6ba3da5ec174c922e5bd31fd127799dcd8e0021d95379e7e8a6bb5bf34de73. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTB62387190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d078c85389e7cced01d94bbc0de49f9bf86d824bf6bf173a2b203a5a59268e1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB62340058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf24badf687acbbb405e3adca980c69dd9cd838ea583a5359aa58572f44c8013. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB62340062.