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 0x6d6fdead146682f7643b395487ec6a2acce84ec07a0ed429c37b530a310f7d1d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25a44280-f919-47ef-ba26-0787ba4b4795.json and https://artists.proofprofile.net/proofs/artist/25a44280-f919-47ef-ba26-0787ba4b4795.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 0xa2f1d85dafaa873951ab9bab3fe54f840adf2e245f631f0f9f8dec1b4ff5aaf8. 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/USANG2426227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60edf8a4caf83ddaa466125623f5e0c4b3613aba81e78a16f81352bdab0c0eb. 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/USANG2441726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf46a122cf76646532b6113fbe0a2e6b8f0d0d905798da1e21c831185d80f08. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USANG2445828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215a3f22e8bb56693932b9f6ec33bcd02ea7c072a63c4b914e18d9cc5c4082cd. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USANG2445829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc917abf4438baa829103e7881e171ae3d43b32ff1ff892026fb1b977b8e1af7a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USANG2445830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cbe00d9c1bf6dce54ec0a84a8abba7c9c8fd4761ae323eaf18246fde13c0e6. 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/USANG2445831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3683ca9a877b7bdeb1ba3e73a3135ebb8ea7e23e206e7d11cdefa326f7c827. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USANG2445832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa18deea633c074a9bff2687407ba970163f5dbe2e054506ac9527cf17eb98. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USANG2445833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39942ce73546471e7bf3b3d5e35391201a359943c56aede48d2dd8e4b84a0e9. 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/USANG2445834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd396703cff0dc972468461b3e9e582f6159de171d0ccf634f125fe27c23e7f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2445835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cdc97a75aa910bc0456ac90f2c3b81a744c3ac8601827096ddff13301af615. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USANG2445836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c79c28481bd8a384cf899ae90d2fd2c8bfce6bffeb596f721b19790899cb15c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2445837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52edeccef29c02900b5ef69547f5b73f7c3fcb1e49eaf9c3374d37f73bf2de7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:49Z), 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/USANG2452090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975c38eeaba96e1254f301e90a0543c6e5fc571273f74852b5ccb9a446ef804a. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USANG2472845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca67e742e44748e7b07797249dca500d408ad9c9dda53b0c27d1c198726940e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:34:40Z), 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/USANG2472846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e9a80da0efdce7b1b0e9bb5bfdd3b599116517b12c961ea55af900bd6de21f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US3DF2527407.