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 0x6b1d1ba1fdff3ee71f5ff0d3e502572072ea151549ac0e19079114bf892de560. Chain 2 (Bitcoin): anchored in block 954023 (2026-06-16T23:57:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/380437c4-3ac8-4476-83cd-e504670288fc.json and https://artists.proofprofile.net/proofs/artist/380437c4-3ac8-4476-83cd-e504670288fc.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 0x3eaae246f8a186e43b15d5de9113f248706fc447b96a939d06f6f94ed593c232. 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/JPCO07807450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76800c44300321fa62da2f8c30670bf692fbe0d49af35728fcf0486946d0bafa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPCO08396700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4656517b9b467d795bd4922dfc7d7a5b8c0c13455af799e7348d2f3582841e7. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/JPCO08804840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8b582c205ef55504401da8989860996dd5366019a200e396a52fe8bd2871e2. 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/JPCO08512060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c5e573e97d7666b9a8339f768f41544d9ccfd7ff59c35f61b41df7a57fc56c. 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/JPCO08113390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388d1a1326d81b698544e0ed9c8ef4add94fef470ca00bf1e44aa263ddd40851. 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/JPCO08529100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf09ce4b558fdb34a1f87ab06aafe91996246c48af6930bcb8b358f6aa848d86. 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/JPCO07903290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28e2a4f0462c882bf71758742b45b9fe203ed26cca42e70bf284f5e22d0ad82. 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/JPCO08018540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e1a45a96fee04920113d35654be7a1eb2227886df2ce68542febde5da832ac. 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/JPCO08070500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b56baf455c3fdc35d21b89ea6611a547ec177374b01bb40b46c4280633b0c. 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/JPCO08221160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d3acad273cd6a0ab8301fe6e86ac914cb1299b57e68e9d07688b7eea65176e. 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/JPCO07478940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe22e10d7270c8c1587c3a968babe831e5818a517f211f5b7c0304aa7d696876. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPCO08116460.
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
Nick Luscombe Selects: Better Days from Japan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5d63bb629f73a1cd144d9446dc4b168dc25801a41fc56b12398ae767d861e7. 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/JPCO08109450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9951dee2d56172b27e29c3a46ef1c39584ac0daff1affdaecb6341614f3ab7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPCO09419460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d8cc8c3355f722351f884403ae8b96dd8b593d524e7b5c9f227ba4591d967d. 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/JPCO08707280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff5998d4759cc57d7a2a769b19b2d2b6b2340216958867553544ca92c3e3df0. 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/JPCO08742850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda180c12a723b70555a2a18d1539576d0469c9db0798af41caec0e1f89e418a7. 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/JPCO08840720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0685c1ea94832de7d5b17161dd7ac360802a8c8e1fb3e9907ff2800529315b27. 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/JPCO00530920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d58c2bc57276411e265b809aa766f8372070522dcc237678e08def241f3a1c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/JPCO08116410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b87e4345435b92bbe048b6beaedbfb5b2dd28beefef447c25059e810a0626e. 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/JPCO07612340.