thumb|right|260px|Seamus Blake performing with Aarhus Jazz Orchestra in Aarhus, Denmark, 2017 Seamus Blake (born December 8, 1970) is a British-born Canadian tenor saxophonist. Early life and educat
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 0x60695ba9f9c6ed7234b6f5dfb375f1da1d99df6de12631de27111cf083650f09. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c054612-6800-4a1e-8d0c-968c8e32acca.json and https://artists.proofprofile.net/proofs/artist/5c054612-6800-4a1e-8d0c-968c8e32acca.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 0x3951ec819c2e09e4b3a70a5de305208d716aafeee081a06e42f78460dabbf3cb. 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/NLGZ21600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d026646c7393b37ad29f4af6989d318521efd36365d2326be4b0ac45d96e864. 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/NLGZ21600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f17f7c6dc12098143e1fe3494b5134bca5cbfb77fed937bb96392224ea0b9cd. 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/NLGZ21600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae7bd5dd25f8c047a37f1b33579cdb75c9062c18349093f1ec0dc3ae71dac6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLGZ21600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b1f6d477cffb12017798630ee26b5acd8592a5a1ca0e244a002ab561bf9a4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLGZ21600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a881773067c7158943d448d68bdd5ecbd761ea86740ee26d366698a01e38f24. 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/NLGZ21600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7819949e48cf99dd8611e582966a8f4dfa2840ad0fd00c710fe87fc94ee46. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB4DA1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450d5dba0a9b8f4413d84eaa0d403ef60a43178e378b39abdc9f1e0e32b23a7e. 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/QZNWV2474464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7675848683a8ce856da597dcf88be0f42409926ed1b175713e6f29be4936f232. 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/QZNWV2474491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0584983ff6eb4d59aaf1110a2f28c37993829ded7d29fb9ec96b99c31139eb4b. 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/QZNWV2474492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358da4869d6e22d95fb4fb30d5d2bdd58564f8ec1c26d0f0fc3e6eb80f9d6c9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2474497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a92cfe3395a8f693a91ef4342d0c660993ec02ba399a4abec70d5cf88ae4d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2474498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493a6da3924b484018c43b812830423f4b525e416ac450d6178c9c286ac0f098. 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/QZNWV2474493.
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 0x9d78415580606fdd4ad6e75422a0a811b40336aaa32b37c4757569882cf6d2b2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWV2474494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8825b7bd84de8cc850f40941fb0bfc9d1b9fc5cef56986a90763c6e187f48854. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWV2474495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a6290560b9e2a1d6fc210abc354a564046fb69f8904117f034d77bdf86a4d9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNWV2474496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f0d99b9839b7fc4968a2fd0c7a340e36993e6ad00c7f8b4d36f85d106cdad2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNWV2474499.